CN103015995A - Method and device for measuring stratigraphic dip by resistivity device with tilt coil - Google Patents
Method and device for measuring stratigraphic dip by resistivity device with tilt coil Download PDFInfo
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- CN103015995A CN103015995A CN2012105505018A CN201210550501A CN103015995A CN 103015995 A CN103015995 A CN 103015995A CN 2012105505018 A CN2012105505018 A CN 2012105505018A CN 201210550501 A CN201210550501 A CN 201210550501A CN 103015995 A CN103015995 A CN 103015995A
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Abstract
The invention discloses a method and a device for measuring a stratigraphic dip by a resistivity device with a tilt coil. The method comprises the following steps: a first magnetic moment and a second magnetic moment are acquired; a first phase difference P1 and a first amplitude ratio A1 are computed; a second phase difference P2 and a second amplitude ratio A2 are computed; a third phase difference P and a third amplitude ratio A are acquired; resistivity R is computed according to P and A; the corresponding relation between R and an azimuth angle of the resistivity device is acquired; and the current stratigraphic dip corresponding to the azimuth angle is determined according to R and the corresponding relation. According to the method and the device disclosed by the invention, because the corresponding relation between the azimuth angle and the resistivity is acquired, an azimuth angle corresponding to an extremum resistivity can be obtained, and the current stratigraphic dip can be obtained according to the azimuth angle corresponding to the extremum resistivity, i.e. the stratigraphic dip is measured without the need of other devices, and the cost is reduced.
Description
Technical field
The present invention relates to the exploration field, in particular to a kind of by stratigraphic dip measuring method and device with the resistivity equipment of tilt coil.
Background technology
The Electromagnetic Wave Propagation resistivity apparatus is substantially the most also to be one of most important device in the well logging during, what do not measure with the Electromagnetic Wave Propagation resistivity apparatus of tilt coil is conventional not with the formation information in orientation, the geosteering function of this device the polarizing angle phenomenon occurs according to device resistivity response when the stratigraphic boundary and realizes, but owing to there not being directionality, so that the polarizing angle of equidirectional all appears in equipment near coboundary or lower boundary at oil reservoir, therefore can only judge whether near the border, therefore can't tell coboundary or lower boundary, can't determine also that this adjusting device moves upward or moves downward.In order to address this problem, improved Electromagnetic Wave Propagation resistivity apparatus has appearred in prior art, two receiving coils are tilted, the signal that measures so just has directionality, so that this device can pick out the present position near coboundary or lower boundary when geosteering, but this device can't record current stratigraphic dip.
Problem for can't record current stratigraphic dip in the prior art with tilt coil Electromagnetic Wave Propagation resistivity apparatus not yet proposes effective solution at present.
Summary of the invention
The invention provides a kind of by stratigraphic dip measuring method and device with the resistivity equipment of tilt coil, to solve at least the problem that can't record current stratigraphic dip in the prior art with tilt coil Electromagnetic Wave Propagation resistivity apparatus.
To achieve these goals, according to an aspect of the present invention, provide a kind of by the stratigraphic dip measuring method with the resistivity equipment of tilt coil.
Comprise by the stratigraphic dip measuring method with the resistivity equipment of tilt coil according to of the present invention: obtain the first magnetic moment and the second magnetic moment, wherein, the first magnetic moment is the magnetic moment of the first transmitting coil, the second magnetic moment is the magnetic moment of the second transmitting coil, and the first transmitting coil and the second transmitting coil are arranged at the two ends with the Electromagnetic Wave Propagation resistivity apparatus of tilt coil; Calculate first-phase potential difference P1 and the first Amplitude Ratio A1, wherein, the phase difference of P1 the first induced electromotive force that to be the first transmitting coil produce at the first receiving coil and the second induced electromotive force of producing at the second receiving coil, A1 is the Amplitude Ratio of the first induced electromotive force and the second induced electromotive force, the first receiving coil and the second receiving coil are between the first transmitting coil and the second transmitting coil, the first induced electromotive force and the first magnetic moment satisfy preset relation, and the second induced electromotive force and the first magnetic moment satisfy preset relation; Calculate second-phase potential difference P2 and the second Amplitude Ratio A2, wherein, the phase difference of P2 the 3rd induced electromotive force that to be the second transmitting coil produce at the first receiving coil and the 4th induced electromotive force that produces at the second receiving coil, A2 is the Amplitude Ratio of the 3rd induced electromotive force and the 4th induced electromotive force, the 3rd induced electromotive force and the second magnetic moment satisfy preset relation, and the 4th induced electromotive force and the second magnetic moment satisfy preset relation; Obtain third phase potential difference P and the 3rd Amplitude Ratio A, wherein, P=(P1+P2)/2, A=(A1+A2)/2; According to P and A calculated resistance rate R, wherein, resistivity equipment is the different R of correspondence when different orientations; Obtain azimuthal corresponding relation of R and resistivity equipment; Determine the current stratigraphic dip that the azimuth is corresponding according to R and corresponding relation.
Further, obtain the first magnetic moment and the second magnetic moment comprises: obtain preset value and be 1 the first magnetic moment and the second magnetic moment.
Further, comprise according to P and A calculated resistance rate R: obtain third phase potential difference or the 3rd amplitude than the value of obtaining R according to default corresponding relation.
Further, the azimuthal corresponding relation that obtains R and resistivity equipment comprises: obtain R with reference to azimuthal corresponding relation, wherein, with reference to the azimuth take formation plane as 0 ° of angle; Obtain the corresponding relation at R and true bearing angle, wherein, the true bearing angle is take horizontal plane as 0 ° of angle.
Further, determine that according to R and corresponding relation current stratigraphic dip corresponding to azimuth comprises: obtain the extreme value among a plurality of R in preset range, wherein, extreme value comprises minimum value Rmin or maximum value Rmax; Determine that true bearing angle that extreme value is corresponding and the difference of reference azimuth are current stratigraphic dip.
To achieve these goals, according to another aspect of the present invention, provide a kind of by the stratigraphic dip measurement mechanism with the resistivity equipment of tilt coil, this device be used for carrying out provided by the invention any one by the stratigraphic dip measuring method with the resistivity equipment of tilt coil.
According to a further aspect in the invention, provide a kind of by the stratigraphic dip measurement mechanism with the resistivity equipment of tilt coil.This device comprises: the first acquiring unit, be used for obtaining the first magnetic moment and the second magnetic moment, wherein, the first magnetic moment is the magnetic moment of the first transmitting coil, the second magnetic moment is the magnetic moment of the second transmitting coil, and the first transmitting coil and the second transmitting coil are arranged at the two ends with the Electromagnetic Wave Propagation resistivity apparatus of tilt coil; The first computing unit, be used for calculating first-phase potential difference P1 and the first Amplitude Ratio A1, wherein, the phase difference of P1 the first induced electromotive force that to be the first transmitting coil produce at the first receiving coil and the second induced electromotive force of producing at the second receiving coil, A1 is the Amplitude Ratio of the first induced electromotive force and the second induced electromotive force, the first receiving coil and the second receiving coil are between the first transmitting coil and the second transmitting coil, the first induced electromotive force and the first magnetic moment satisfy preset relation, and the second induced electromotive force and the first magnetic moment satisfy preset relation; The second computing unit, be used for calculating second-phase potential difference P2 and the second Amplitude Ratio A2, wherein, the phase difference of P2 the 3rd induced electromotive force that to be the second transmitting coil produce at the first receiving coil and the 4th induced electromotive force that produces at the second receiving coil, A2 is the Amplitude Ratio of the 3rd induced electromotive force and the 4th induced electromotive force, the 3rd induced electromotive force and the second magnetic moment satisfy preset relation, and the 4th induced electromotive force and the second magnetic moment satisfy preset relation; Second acquisition unit is used for obtaining third phase potential difference P and the 3rd Amplitude Ratio A, wherein, and P=(P1+P2)/2, A=(A1+A2)/2; The 3rd acquiring unit is used for root according to P and A calculated resistance rate R, and wherein, resistivity equipment is the different R of correspondence when different orientations; The 4th acquiring unit is for the azimuthal corresponding relation that obtains R and resistivity equipment; Determining unit is used for determining the current stratigraphic dip that the azimuth is corresponding according to R and corresponding relation.
Further, the first acquiring unit comprises: first obtains subelement, is used for obtaining preset value and is 1 the first magnetic moment and the second magnetic moment.
Further, determining unit is also for obtaining third phase potential difference or the 3rd amplitude according to default corresponding relation than the value of obtaining R.
Further, the 4th acquiring unit comprises: second obtains subelement, be used for obtaining R with reference to azimuthal corresponding relation, wherein, with reference to the azimuth take formation plane as 0 ° of angle; The 3rd obtains subelement, is used for obtaining the corresponding relation at R and true bearing angle, and wherein, the true bearing angle is take horizontal plane as 0 ° of angle.
Further, determining unit comprises: the 4th obtains subelement, is used for obtaining in preset range the extreme value of a plurality of R, and wherein, extreme value comprises minimum value Rmin or maximum value Rmax; Determine subelement, being used for true bearing angle corresponding to definite extreme value and the difference of reference azimuth is current stratigraphic dip.
By the present invention, owing to having obtained the corresponding relation of azimuth and resistivity, thereby can be in the hope of the corresponding azimuth of extreme value resistivity, can be in the hope of current stratigraphic dip according to the azimuth that extreme value resistivity is corresponding, therefore solved the problem that can't record current stratigraphic dip in the prior art with tilt coil Electromagnetic Wave Propagation resistivity apparatus, namely do not need to measure stratigraphic dip by other equipment, reduced cost.
Description of drawings
The accompanying drawing that consists of the application's a part is used to provide a further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 a is the structured flowchart with the stratigraphic dip measurement mechanism of the resistivity equipment of tilt coil of passing through according to the embodiment of the invention;
Fig. 1 b is the schematic diagram according to the conversion plate of the phase difference of the embodiment of the invention and resistivity;
Fig. 1 c is the schematic diagram according to the conversion plate of the amplitude ratio of the embodiment of the invention and resistivity;
Fig. 2 is the schematic diagram according to the resistivity equipment of the embodiment of the invention;
Fig. 3 is the flow chart with the stratigraphic dip measuring method of the resistivity equipment of tilt coil of passing through according to the embodiment of the invention;
Fig. 4 a is the schematic diagram according to the corresponding relation of the phase difference apparent resistivity of the embodiment of the invention and reference azimuth;
Fig. 4 b is according to the amplitude of the embodiment of the invention schematic diagram than the corresponding relation of apparent resistivity and reference azimuth;
Fig. 5 is the schematic diagram according to the corresponding relation at the phase difference apparent resistivity of the embodiment of the invention and true bearing angle.
The specific embodiment
Need to prove, in the situation that do not conflict, embodiment and the feature among the embodiment among the application can make up mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
It is a kind of by the stratigraphic dip measurement mechanism with the resistivity equipment of tilt coil that the embodiment of the invention provides, and below the stratigraphic dip measurement mechanism of passing through of providing of the embodiment of the invention with the resistivity equipment of tilt coil is introduced.
Fig. 1 a is the structured flowchart with the stratigraphic dip measurement mechanism of the resistivity equipment of tilt coil of passing through according to the embodiment of the invention.
As shown in Figure 1a, this device comprises the first acquiring unit 11, the first computing unit 12, the second computing unit 13, second acquisition unit 14, the 3rd acquiring unit 15, the 4th acquiring unit 16 and determining unit 17.
The first acquiring unit 11 is used for obtaining the first magnetic moment and the second magnetic moment, wherein, the first magnetic moment is the magnetic moment of the first transmitting coil, and the second magnetic moment is the magnetic moment of the second transmitting coil, and the first transmitting coil and the second transmitting coil are arranged at the two ends with the Electromagnetic Wave Propagation resistivity apparatus of tilt coil.
The first computing unit 12 is used for calculating first-phase potential difference P1 and the first Amplitude Ratio A1, wherein, the phase difference of P1 the first induced electromotive force that to be the first transmitting coil produce at the first receiving coil and the second induced electromotive force of producing at the second receiving coil, A1 is the Amplitude Ratio of the first induced electromotive force and the second induced electromotive force, the first receiving coil and the second receiving coil are between the first transmitting coil and the second transmitting coil, the first induced electromotive force and the first magnetic moment satisfy preset relation, and the second induced electromotive force and the first magnetic moment satisfy preset relation.
The second computing unit 13 is used for calculating second-phase potential difference P2 and the second Amplitude Ratio A2, wherein, the phase difference of P2 the 3rd induced electromotive force that to be the second transmitting coil produce at the first receiving coil and the 4th induced electromotive force that produces at the second receiving coil, A2 is the Amplitude Ratio of the 3rd induced electromotive force and the 4th induced electromotive force, the 3rd induced electromotive force and the second magnetic moment satisfy preset relation, and the 4th induced electromotive force and the second magnetic moment satisfy preset relation.
The 3rd acquiring unit 15 is used for according to P and A calculated resistance rate R, and wherein, resistivity equipment is the different R of correspondence when different orientations.
The 4th acquiring unit 16 is used for obtaining azimuthal corresponding relation of R and resistivity equipment.
Determining unit 17 is used for determining the current stratigraphic dip that the azimuth is corresponding according to R and corresponding relation.
In the present embodiment, owing to having obtained the corresponding relation of azimuth and resistivity, thus can be in the hope of the corresponding azimuth of extreme value resistivity, can be in the hope of current stratigraphic dip according to the azimuth that extreme value resistivity is corresponding, namely do not need to measure stratigraphic dip by other equipment, reduced cost.
As a kind of preferred implementation, the first acquiring unit comprises: first obtains subelement, is used for obtaining preset value and is 1 the first magnetic moment and the second magnetic moment.
Particularly, determining unit can be obtained third phase potential difference or the 3rd amplitude than the value of obtaining resistivity and change plate R according to the default corresponding relation of following basis.
Default corresponding relation can be resistivity conversion plate, Fig. 1 b is the schematic diagram according to the conversion plate of the phase difference of the embodiment of the invention and resistivity, Fig. 1 c is the schematic diagram according to the conversion plate of the amplitude ratio of the embodiment of the invention and resistivity, this conversion plate is to draw according to the data that record early stage to form, particularly, curve in the plate be the corresponding relation of resistivity and phase difference and Amplitude Ratio, can obtain corresponding resistivity value with obtaining phase difference and Amplitude Ratio interpolation in plate.We claim this value to be apparent resistivity value.
In order to reduce amount of calculation, can be with formation plane as 0 ° of azimuth, preferably, the 4th acquiring unit comprises: second obtains subelement, be used for obtaining R with reference to azimuthal corresponding relation, wherein, with reference to the azimuth take formation plane as 0 ° of angle.The 3rd obtains subelement, is used for obtaining the corresponding relation at R and true bearing angle, and wherein, the true bearing angle is take horizontal plane as 0 ° of angle.
In order further to reduce amount of calculation, with extreme value, as a reference point such as Rmin or Rmax, determining unit comprises: the 4th obtains subelement, is used for obtaining in preset range the extreme value of a plurality of R, wherein, extreme value comprises minimum value Rmin or maximum value Rmax, and preset range can be in positive and negative 90 ° of scopes, only has an extreme value in this scope, this extreme value both may be Rmin, also may be Rmax; Determine subelement, being used for true bearing angle corresponding to definite this extreme value and the difference of reference azimuth is current stratigraphic dip.
Fig. 2 is the schematic diagram according to the resistivity equipment of the embodiment of the invention, as shown in Figure 2, T1, T2 are with point-symmetric transmitting coil among R1 and the R2, R1 and R2 are two inclination receiving coils, the angle that these two tilt coils tilt can be arbitrary size, but can not be ± 90 °, and the angle that tilts to equate, take the angle of T1, T2 coil as 0 degree.This kind equipment can have a plurality of and T1, the different symmetrical transmitting coil in T2 position, and mandrel M is the metal non magnetic drill collar.
It is a kind of by the stratigraphic dip measuring method with the resistivity equipment of tilt coil that the embodiment of the invention also provides, and the method can be carried out based on above-mentioned device.
Fig. 3 is the flow chart with the stratigraphic dip measuring method of the resistivity equipment of tilt coil of passing through according to the embodiment of the invention.
As shown in Figure 3, the method comprises that following step S302 is to step S314.
Step S302, obtain the first magnetic moment and the second magnetic moment, wherein, the first magnetic moment is the magnetic moment of the first transmitting coil, the second magnetic moment is the magnetic moment of the second transmitting coil, and the first transmitting coil and the second transmitting coil are arranged at the two ends with the Electromagnetic Wave Propagation resistivity apparatus of tilt coil.
Because the variation of magnetic moment can't affect the value of phase difference and the Amplitude Ratio of calculating, can not affect follow-up other yet and calculate, therefore can suppose that the value of magnetic moment is 1, that is, in this step, obtain preset value and be 1 the first magnetic moment and the second magnetic moment.
Step S304, calculate first-phase potential difference P1 and the first Amplitude Ratio A1, wherein, the phase difference of P1 the first induced electromotive force that to be the first transmitting coil produce at the first receiving coil and the second induced electromotive force of producing at the second receiving coil, A1 is the Amplitude Ratio of the first induced electromotive force and the second induced electromotive force, the first receiving coil and the second receiving coil are between the first transmitting coil and the second transmitting coil, the first induced electromotive force and the first magnetic moment satisfy preset relation, and the second induced electromotive force and the first magnetic moment satisfy preset relation.
Step S306, calculate second-phase potential difference P2 and the second Amplitude Ratio A2, wherein, the phase difference of P2 the 3rd induced electromotive force that to be the second transmitting coil produce at the first receiving coil and the 4th induced electromotive force that produces at the second receiving coil, A2 is the Amplitude Ratio of the 3rd induced electromotive force and the 4th induced electromotive force, the 3rd induced electromotive force and the second magnetic moment satisfy preset relation, and the 4th induced electromotive force and the second magnetic moment satisfy preset relation.
Transmitting coil T1 and T2 launch respectively hundreds of kHz to the electromagnetic wave of a few MHz frequencies among Fig. 2, electromagnetic wave can produce respectively induced electromotive force V1 and V2 after through the propagation on stratum on receiving coil R1 and R2, after measuring, can calculate two phase difference P and Amplitude Ratio A between the receiving coil electromotive force, P1 and A1 represent phase difference and the Amplitude Ratio that the T1 transmitting coil produces at receiving coil, and P2 and A2 represent phase difference and the Amplitude Ratio that the T2 transmitting coil produces at receiving coil.
Take equipment axis as rectangular coordinate system z axle, the direction vertical with equipment axis is the x axle, the incline direction of tilt coil is in the xz plane of coordinate axes, and the induced electromotive force on receiving coil under such coordinate system has directionality, and the formula of concrete induced electromotive force is as follows:
In (1) formula, M
TBe the magnetic moment of transmitting coil,
Be the Green's function that z direction magnetic dipole produces in the x direction, the meaning of all the other similar expression formulas should be understood that θ mutually by this rule
TBe the angle of inclination of transmitting coil, θ
RBe the angle of inclination of receiving coil, φ is the azimuth of equipment.(1) can easily be found out from formula, if θ
T=θ
R=0, i.e. conventional electromagnetic resistivity equipment, then all items relevant with φ are zero, illustrate that the electromotive force and the φ that measure have nothing to do, and do not have directionality.The device model as shown in Figure 2 that relates to for the present embodiment is because the inclination of receiving coil, i.e. θ
T=0, θ
R≠ 0, then just contain sin θ
TItem be zero, the item relevant with the orientation that namely contains cos (2 φ) and sin (2 φ) is zero, and it is non-vanishing to contain the item of cos (φ) and sin (φ).But equipment just creeps in the xz plane, then Green's function
Only surplus cos (φ) of the electromotive force of this moment item relevant with the orientation, obviously, the bearing signal of this moment is cosine function, signal maximum when 0 ° and 180 °.
Step S308 obtains third phase potential difference P and the 3rd Amplitude Ratio A, wherein, and P=(P1+P2)/2, A=(A1+A2)/2.
Step S310, according to P and A calculated resistance rate R, wherein, resistivity equipment is the different R of correspondence when different orientations.
Phase difference and Amplitude Ratio result that T1, T2 are measured compensate, the phase difference P=(P1+P2)/2 after the compensation, A=(A1+A2)/2.Utilize the conversion plate between phase difference, Amplitude Ratio and the resistivity can convert apparent resistivity R to phase difference and Amplitude Ratio after the compensation, the resistivity in the present embodiment is also referred to as apparent resistivity.Along with the rotation of equipment, equipment obtains different apparent resistivity values under different orientations.
Particularly, can obtain third phase potential difference or the 3rd amplitude than the value of obtaining R according to default corresponding relation, corresponding relation is shown in Fig. 1 b and Fig. 1 c.
Step S312 obtains azimuthal corresponding relation of R and resistivity equipment.
Particularly, on the one hand, obtain R with reference to azimuthal corresponding relation, wherein, with reference to the azimuth take formation plane as 0 ° of angle; On the other hand, obtain the corresponding relation at R and true bearing angle, wherein, the true bearing angle is take horizontal plane as 0 ° of angle.
Particularly, according to device coordinate direction and 0 ° of azimuthal direction of definition, device orientation information is the varies with cosine relation with the variation relation in orientation, sees formula (1) for details, be that the azimuth information of orientation when being 0 ° and 180 ° is maximum, this rule will be the important prerequisite that obtains stratigraphic dip.
When resistivity equipment rotates, can obtain apparent resistivity response with the change curve in orientation in oil reservoir, see Fig. 4.No matter be that phase difference apparent resistivity or the form of Amplitude Ratio apparent resistivity curve always change between the form of sine and cosine, and maximum discovery is the orientation that the peak value of curve all appears at 0 ° and 180 °, and this rule can be utilized to the orientation of true bearing and definition is mated just.
Fig. 4 a is the schematic diagram according to the corresponding relation of the phase difference apparent resistivity of the embodiment of the invention and reference azimuth, and Fig. 4 b is according to the amplitude of the embodiment of the invention schematic diagram than the corresponding relation of apparent resistivity and reference azimuth.The operating frequency of equipment is 2MHz among Fig. 4 a and Fig. 4 b, be transmitted into two receiving coil Point Sources apart from being 30in, two receiving coil spacings are 8in, and two receiving coils tilt 45 °, equipment relatively inclination layer is 30 °, and survey mark is that two receiving coil mid points are at the target zone mid point.Model up and down shoulder-bed resistivity (SBR) is 1.0Ohmm, and isotropism and horizontal resistivity that target zone minute horizontal and vertical resistivity is 10.0Ohmm are that 10.0Ohmm, vertical resistivity are two kinds of situations of anisotropy of 50.0Ohmm, bed thickness 2m.
In actual measurement, direction setting in the time of can the xz plane of equipment is vertical with the earth horizontal plane is 0 ° in the orientation of actual measurement, if the stratum is parallel with horizontal plane, what then the peak value of equipment measured curve will be with Fig. 4 a is consistent, appear at 0 ° and 180 °, can be easy to judge stratigraphic dip this moment is 0 °.But it is uneven with horizontal plane that a lot of situation sub-surfaces are arranged in the reality, the bearing range that changes is between-90 ° to 90 °, therefore the peak value of the apparent resistivity curve that changes with the orientation of actual measurement should also can occur between-90 ° to 90 °, and be unique, corresponding measured direction is exactly 0 ° that defines in 2 find peak value in this interval after, namely, stratigraphic dip, Fig. 5 is the schematic diagram according to the corresponding relation at the phase difference apparent resistivity of the embodiment of the invention and true bearing angle, all stratum and device parameter among Fig. 5 are identical with Fig. 4 a, and the stratigraphic dip of this moment is 30 °.As shown in Figure 5,0 ° of orientation of actual measurement is not peak value, seeks the log response data and find to have occurred peak value in-90 ° to 90 ° in the time of 30 °.
Step S314 determines the current stratigraphic dip that the azimuth is corresponding according to R and corresponding relation.
In this step, at first can obtain the extreme value among a plurality of R in preset range, wherein, extreme value comprises minimum value Rmin or maximum value Rmax, then can determine that true bearing angle that extreme value is corresponding and the difference of reference azimuth are current stratigraphic dip, preset range can be between positive and negative 90 °.
In Fig. 4 a, corresponding 0 ° of Rmin, in Fig. 5, corresponding 30 ° of Rmin, 30 ° are this moment by the current stratigraphic dip of apparent resistivity information acquisition.And the value of this current stratigraphic dip upgrades once along with equipment whenever rotates a circle, therefore can fast monitored to the variation of stratigraphic dip.
As can be seen from the above description, the embodiment of the invention does not need to measure stratigraphic dip by other equipment, has reduced cost.
Need to prove, can in the computer system such as one group of computer executable instructions, carry out in the step shown in the flow chart of accompanying drawing, and, although there is shown logical order in flow process, but in some cases, can carry out step shown or that describe with the order that is different from herein.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and be carried out by calculation element, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. one kind by the stratigraphic dip measuring method with the resistivity equipment of tilt coil, it is characterized in that, comprising:
Obtain the first magnetic moment and the second magnetic moment, wherein, described the first magnetic moment is the magnetic moment of the first transmitting coil, and described the second magnetic moment is the magnetic moment of the second transmitting coil, and described the first transmitting coil and described the second transmitting coil are arranged at the two ends with the Electromagnetic Wave Propagation resistivity apparatus of tilt coil;
Calculate first-phase potential difference P1 and the first Amplitude Ratio A1, wherein, the phase difference of described P1 the first induced electromotive force that to be the first transmitting coil produce at the first receiving coil and the second induced electromotive force of producing at the second receiving coil, described A1 is the Amplitude Ratio of described the first induced electromotive force and the second induced electromotive force, described the first receiving coil and described the second receiving coil are between described the first transmitting coil and described the second transmitting coil, described the first induced electromotive force and described the first magnetic moment satisfy preset relation, and described the second induced electromotive force and described the first magnetic moment satisfy preset relation;
Calculate second-phase potential difference P2 and the second Amplitude Ratio A2, wherein, the phase difference of described P2 the 3rd induced electromotive force that to be the second transmitting coil produce at described the first receiving coil and the 4th induced electromotive force that produces at described the second receiving coil, described A2 is the Amplitude Ratio of described the 3rd induced electromotive force and described the 4th induced electromotive force, described the 3rd induced electromotive force and described the second magnetic moment satisfy preset relation, and described the 4th induced electromotive force and described the second magnetic moment satisfy preset relation;
Obtain third phase potential difference P and the 3rd Amplitude Ratio A, wherein, P=(P1+P2)/2, A=(A1+A2)/2;
According to described P and described A calculated resistance rate R, wherein, resistivity equipment is the different R of correspondence when different orientations;
Obtain azimuthal corresponding relation of R and described resistivity equipment;
Determine the current stratigraphic dip that described azimuth is corresponding according to described R and described corresponding relation.
2. method according to claim 1 is characterized in that, obtains the first magnetic moment and the second magnetic moment comprises:
Obtain preset value and be 1 described the first magnetic moment and described the second magnetic moment.
3. method according to claim 1 is characterized in that, comprises according to described P and described A calculated resistance rate R:
Obtain described third phase potential difference or described the 3rd amplitude than the value of obtaining described R according to default corresponding relation.
4. method according to claim 1 is characterized in that,
The azimuthal corresponding relation that obtains R and described resistivity equipment comprises:
Obtain described R with reference to azimuthal corresponding relation, wherein, described with reference to the azimuth take formation plane as 0 ° of angle;
Obtain the corresponding relation at described R and true bearing angle, wherein, described true bearing angle is take horizontal plane as 0 ° of angle.
5. method according to claim 4 is characterized in that, determines that according to described R and described corresponding relation current stratigraphic dip corresponding to described azimuth comprises:
Obtain the extreme value among a plurality of described R in preset range, wherein, described extreme value comprises minimum value Rmin or maximum value Rmax;
Determine that described true bearing angle that described extreme value is corresponding and the difference of described reference azimuth are current stratigraphic dip.
6. one kind by the stratigraphic dip measurement mechanism with the resistivity equipment of tilt coil, it is characterized in that, comprising:
The first acquiring unit, be used for obtaining the first magnetic moment and the second magnetic moment, wherein, described the first magnetic moment is the magnetic moment of the first transmitting coil, described the second magnetic moment is the magnetic moment of the second transmitting coil, and described the first transmitting coil and described the second transmitting coil are arranged at the two ends with the Electromagnetic Wave Propagation resistivity apparatus of tilt coil;
The first computing unit, be used for calculating first-phase potential difference P1 and the first Amplitude Ratio A1, wherein, the phase difference of described P1 the first induced electromotive force that to be the first transmitting coil produce at the first receiving coil and the second induced electromotive force of producing at the second receiving coil, described A1 is the Amplitude Ratio of described the first induced electromotive force and the second induced electromotive force, described the first receiving coil and described the second receiving coil are between described the first transmitting coil and described the second transmitting coil, described the first induced electromotive force and described the first magnetic moment satisfy preset relation, and described the second induced electromotive force and described the first magnetic moment satisfy preset relation;
The second computing unit, be used for calculating second-phase potential difference P2 and the second Amplitude Ratio A2, wherein, the phase difference of described P2 the 3rd induced electromotive force that to be the second transmitting coil produce at described the first receiving coil and the 4th induced electromotive force that produces at described the second receiving coil, described A2 is the Amplitude Ratio of described the 3rd induced electromotive force and described the 4th induced electromotive force, described the 3rd induced electromotive force and described the second magnetic moment satisfy preset relation, and described the 4th induced electromotive force and described the second magnetic moment satisfy preset relation;
Second acquisition unit is used for obtaining third phase potential difference P and the 3rd Amplitude Ratio A, wherein, and P=(P1+P2)/2, A=(A1+A2)/2;
The 3rd acquiring unit is used for root according to described P and described A calculated resistance rate R, and wherein, resistivity equipment is the different R of correspondence when different orientations;
The 4th acquiring unit is for the azimuthal corresponding relation that obtains R and described resistivity equipment;
Determining unit is used for determining the current stratigraphic dip that described azimuth is corresponding according to described R and described corresponding relation.
7. device according to claim 6 is characterized in that, described the first acquiring unit comprises:
First obtains subelement, is used for obtaining preset value and is 1 described the first magnetic moment and described the second magnetic moment.
8. device according to claim 6 is characterized in that,
Described determining unit is also for obtaining described third phase potential difference or described the 3rd amplitude according to default corresponding relation than the value of obtaining described R.
9. device according to claim 6 is characterized in that, described the 4th acquiring unit comprises:
Second obtains subelement, be used for obtaining described R with reference to azimuthal corresponding relation, wherein, described with reference to the azimuth take formation plane as 0 ° of angle;
The 3rd obtains subelement, is used for obtaining the corresponding relation at described R and true bearing angle, and wherein, described true bearing angle is take horizontal plane as 0 ° of angle.
10. device according to claim 6 is characterized in that, described determining unit comprises:
The 4th obtains subelement, is used for obtaining in preset range the extreme value of a plurality of described R, and wherein, described extreme value comprises minimum value Rmin or maximum value Rmax;
Determine subelement, being used for described true bearing angle corresponding to definite described extreme value and the difference of described reference azimuth is current stratigraphic dip.
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