CN104763401A - Shale gas exploitation well spacing method - Google Patents
Shale gas exploitation well spacing method Download PDFInfo
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- CN104763401A CN104763401A CN201510157650.1A CN201510157650A CN104763401A CN 104763401 A CN104763401 A CN 104763401A CN 201510157650 A CN201510157650 A CN 201510157650A CN 104763401 A CN104763401 A CN 104763401A
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- horizontal
- platform
- horizontal well
- well
- wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/30—Specific pattern of wells, e.g. optimizing the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimizing the spacing of wells comprising at least one inclined or horizontal well
Abstract
The invention discloses a shale gas exploitation well spacing method. The shale gas exploitation and well spacing method includes following steps: using a platform 1 as an origin of coordinates, setting the X axis along the maximum principal stress direction S1 in an area, and setting a rectangular plane coordinate system on a horizontal plane; setting positions of horizontal wells on the platform 1, disposing the horizontal wells along the Y axial direction S2, arranging each three horizontal wells in one row, disposing the horizontal wells in two directions of the platform 1, disposing the horizontal wells in two rows on the platform 1, and using the platform 1 to the utmost; setting the vertical distance from the near end of each horizontal well to the platform 1 as one half of the length of a horizontal segment; disposing a well group on a platform 2 following the above steps. The shale gas exploitation and well spacing method crosswise disposes the platform 1 and the platform 2, effectively employs underground resources, and reduces the number of the platforms on the ground by adjusting the layout of the platforms on the premise of controlling the underground resources to the utmost.
Description
Technical field
The present invention relates to shale gas development technique field, particularly relate to a kind of shale gas exploitation well-arranging procedure.
Background technology
Current domestic without extensive shale gas development block, without shaping exploitation well pattern.External shale gas exploitation is main adopts cluster well well pattern (Fig. 1), and namely a platform bores 3-4 mouth water horizontal well or super both direction brill 6-8 mouth well towards a direction, greatly can reduce workload and land occupation before boring.But due to certain displacement must be left in each platform well drilling process, so just cause subterranean resource waste, in order to avoid waste employing 2 platforms intersection well spacing turn increase working platform amount, cause the waste of ground resource, and be not suitable for domestic mountain region complicated earth surface platform selecting difficulty pattern.
Summary of the invention
The technical problem to be solved in the present invention is for defect of the prior art, provides a kind of shale gas to develop well-arranging procedure, uses this well-arranging procedure to adjust platform layout to reduce the shale gas that ground surface platform number at utmost can control again subterranean resource simultaneously.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of shale gas exploitation well-arranging procedure, comprises the following steps:
1) position of selected first platform, determine region biggest principal stress direction, with the first platform for the origin of coordinates, the direction along region biggest principal stress direction S1 arranges X-axis positive direction, arranges plane right-angle coordinate in the horizontal plane;
2) the horizontal well group of the first platform is disposed along Y direction, specific as follows:
2.1) arrange water horizontal well A along Y-axis positive direction, described horizontal well A in the horizontal plane be projected in Y-axis, near-end distance first platform of horizontal well A be more than or equal to 1/2 of the horizontal section length of horizontal well along Y direction distance;
2.2) parallelly with described horizontal well A be arranged side by side two mouthfuls of water horizontal wells, two mouthfuls of water horizontal wells are separately positioned on the both sides of horizontal well A; Shape Mitsui in a row;
2.3) arrange horizontal well B along Y-axis negative direction, horizontal well B and horizontal well A projection in the horizontal plane take X-axis as axis of symmetry symmetry, parallelly with described horizontal well B are arranged side by side two mouthfuls of water horizontal wells, and two mouthfuls of water horizontal wells are separately positioned on the both sides of horizontal well B; Shape Mitsui in a row; The horizontal well group finally obtaining the first platform is two row six wells;
3) the second platform is set in the midpoint of horizontal well A or horizontal well B projection in the horizontal plane;
4) dispose the horizontal well group of the second platform along Y direction, the horizontal well group of the second platform and the horizontal well group cross part of the first platform are affixed one's name to, specific as follows:
4.1) position between the horizontal well group well of the first platform, water horizontal well C is arranged along Y-axis positive direction, described horizontal well C in the horizontal plane be projected in Y-axis, the two ends of horizontal well C keep same distance with the horizontal well B of the first platform and horizontal well A adjacent end respectively;
4.2) parallelly with described horizontal well C be arranged side by side two mouthfuls of water horizontal wells, two mouthfuls of water horizontal wells are separately positioned on the both sides of horizontal well C; Shape Mitsui in a row;
4.3) according to step 4.2) formed one row Mitsui be arranged symmetrically with row's Mitsui at the opposite side of the second platform, formed two row six wells; These two rows, six wells are symmetrical in the dot center centered by the second platform of projection in the horizontal plane.
By such scheme, described step 2.1) in, near-end distance first platform of horizontal well A be greater than or equal to 1/2 of the horizontal section length of horizontal well along Y direction distance, and being less than 1/2 of the horizontal section length of horizontal well along Y direction distance and adding 100 meters of the near-end of horizontal well A distance the first platform.
The beneficial effect that the present invention produces is: be horizontal section length by the distance adjusted between two platforms, intersects well spacing, and 2 platforms can be implemented drilling well 4 and arrange, and platform is placed on the centre of middle 2 row's wells, and by the method well spacing, reserves exploitation rate is high, and platform utilization rate is high.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation of the embodiment of the present invention;
Fig. 2 is the structural representation of the embodiment of the present invention.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
A kind of shale gas exploitation well-arranging procedure, comprises the following steps:
1) position of selected first platform, determine region biggest principal stress direction, with the first platform for the origin of coordinates, the direction along region biggest principal stress direction S1 arranges X-axis positive direction, arranges plane right-angle coordinate in the horizontal plane;
2) the horizontal well group of the first platform is disposed along Y direction, as shown in Figure 1, specific as follows:
2.1) arrange water horizontal well A2B2 along Y-axis positive direction, described horizontal well in the horizontal plane be projected in Y-axis, near-end A2 distance first platform of horizontal well be more than or equal to 1/2 of the horizontal section length of horizontal well A2B2 along Y direction distance; Stock number is ensured again, being less than 1/2 of the horizontal section length of horizontal well along Y direction distance and adding 100 meters of near-end distance first platform of setting horizontal well A for the ease of construction.
2.2) parallelly with described horizontal well A2B2 be arranged side by side two mouthfuls of water horizontal wells A1B1, A3B3, two mouthfuls of water horizontal wells are separately positioned on the both sides of horizontal well A; Shape Mitsui in a row;
2.3) horizontal well A5B5 is arranged along Y-axis negative direction, horizontal well A5B5 and horizontal well A2B2 projection are in the horizontal plane that axis of symmetry is symmetrical with X-axis, parallelly with described horizontal well A5B5 be arranged side by side two mouthfuls of water horizontal wells A6B6, A4B4, two mouthfuls of water horizontal wells are separately positioned on the both sides of horizontal well A5B5; Shape Mitsui in a row; The horizontal well group finally obtaining the first platform is two row six wells; The horizontal section length of each horizontal well of two row's six wells is identical.
3) the second platform is set in the midpoint of horizontal well A or horizontal well B projection in the horizontal plane;
4) dispose the horizontal well group of the second platform along Y direction, the horizontal well group of the second platform and the horizontal well group cross part of the first platform are affixed one's name to, after deployment as shown in Figure 2, specific as follows:
4.1) position between the horizontal well group well of the first platform, arranges water horizontal well C2D2 along Y-axis positive direction, described horizontal well C2D2 in the horizontal plane be projected in Y-axis, two ends C2, D2 of horizontal well C2D2 meet A2D2=C2D5;
4.2) parallelly with described horizontal well C2D2 be arranged side by side two mouthfuls of water horizontal wells C1D1, C3D3, two mouthfuls of water horizontal wells are separately positioned on the both sides of horizontal well C2D2; Shape Mitsui in a row;
4.3) according to step 4.2) formed one row Mitsui be arranged symmetrically with row's Mitsui C4D4, C5D5, a C6D6 at the opposite side of the second platform, formed two row six wells; These two rows, six wells are symmetrical in the dot center centered by the second platform of projection in the horizontal plane.The horizontal section length of each horizontal well of two row's six wells is identical, consistent with the first plateau levels segment length.
According to the content of above invention, " shale gas field, Fuling burnt masonry dam block first phase Productivity Construction scheme " project is applied, achieves good effect.
(1) burnt masonry dam block Basic Geological Characteristics
1. burnt masonry dam is configured to by the complicated arch structure of tomography, and stratum southwester, northeastward topples.Main body section attitude of stratum (is less than 5 gently
0), northwestward attitude of stratum comparatively steep (32
0), main body section first phase Chan Jian district fracture agensis, buried depth is moderate, attitude of stratum is relatively mild.
2. five peaks-bottom, Longma small stream group stratum is dark-coloured carbonaceous, siliceous mud shale section (corresponding burnt page 1 well thickness 89m), 5 kinds of rock facies types can be divided, wherein 38m major pay section in bottom is mainly rich organic Silicon-rich shale phase, and in plane, distribution is stable, and thickness is suitable.
3. mud shale section from top to bottom organic hole and bedding seam be tending towards grow, pore throat radius is mainly distributed in 4-16nm, accounts for about 80%, and pore throat radius permeability being played to main contributions is mainly 6.3-16nm.Matrix average horizontal permeability 0.25mD.
4. cross according to quartz content and Factor of Brittleness, clay content, brittleness index and density cross result, and compressibility segmentation is obvious, and bottom overall merit, 38m major pay Duan Weiyi presses interval.
5. in gas component based on methane, secondly average content 98.27% is nitrogen, ethane etc.Not sulfide hydrogen, carbon monoxide and hydrogen.
6. burnt masonry dam area five peaks-Longma small stream group shale gas reservoir is continuity gas reservoir, does not have obvious border.Gas reservoir types is mid-deep strata, gas drive, high pressure shale gas reservoir.
(2) burnt masonry dam block developing value research
Longma small stream group shale gas first phase Chan Jian district of Fuling Prefecture upper Ordovician series five peak group-Lower Silurian Series Longma small stream group shale gas should adopt a set of straticulate exploration, blowdown mode is developed; Select group-Lower Silurian Series Longma small stream group No. 3 substratum middle and lower parts, upper Ordovician series five peak as Horizontal Well Targets window; Initil output increases with horizontal section length and increases, and consider engineering construction difficulty, horizontal section length is based on 1500m, and orientation is vertical with orientation of principal stress, 0 °, azimuth, and peak excursion angle is less than 30 °; Rational spacing between wells 600m.
(3) burnt masonry dam block development plan is disposed
Longma small stream group shale gas first phase Chan Jian district of Fuling Prefecture development plan is disposed: dispose area 262.7km
2, reserves 1951.1 × 10 in district
8m
3; Adopt this method to carry out well spacing, dispose 63 platforms, 253 mouthfuls of wells altogether, newly-built production capacity 50 × 10
8m
3.
According to external shale gas well pattern 1 platform 6 well, with reference to burnt masonry dam block developing value, calculate, control reserve 1581 × 108m3 according to employing area 262.7km2, contrast first phase produces scheme of building and reduces control reserve 369 × 108m3.
According to external shale gas well pattern 1 platform 3 well, with reference to burnt masonry dam block developing value, calculating, needing 97, newly-built platform according to employing area 262.7km2, contrast first phase produces scheme of building increases by 34, platform.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (2)
1. a shale gas exploitation well-arranging procedure, is characterized in that, comprise the following steps:
1) position of selected first platform, determine region biggest principal stress direction, with the first platform for the origin of coordinates, the direction along region biggest principal stress direction S1 arranges X-axis positive direction, arranges plane right-angle coordinate in the horizontal plane;
2) the horizontal well group of the first platform is disposed along Y direction, specific as follows:
2.1) arrange water horizontal well A along Y-axis positive direction, described horizontal well A in the horizontal plane be projected in Y-axis, near-end distance first platform of horizontal well A be greater than or equal to 1/2 of the horizontal section length of horizontal well along Y direction distance;
2.2) parallelly with described horizontal well A be arranged side by side two mouthfuls of water horizontal wells, two mouthfuls of water horizontal wells are separately positioned on the both sides of horizontal well A; Shape Mitsui in a row;
2.3) arrange horizontal well B along Y-axis negative direction, horizontal well B and horizontal well A projection in the horizontal plane take X-axis as axis of symmetry symmetry, parallelly with described horizontal well B are arranged side by side two mouthfuls of water horizontal wells, and two mouthfuls of water horizontal wells are separately positioned on the both sides of horizontal well B; Shape Mitsui in a row; The horizontal well group finally obtaining the first platform is two row six wells;
3) the second platform is set in the midpoint of horizontal well A or horizontal well B projection in the horizontal plane;
4) dispose the horizontal well group of the second platform along Y direction, the horizontal well group of the second platform and the horizontal well group cross part of the first platform are affixed one's name to, specific as follows:
4.1) position between the horizontal well group well of the first platform, water horizontal well C is arranged along Y-axis positive direction, described horizontal well C in the horizontal plane be projected in Y-axis, the two ends of horizontal well C keep same distance with the horizontal well B of the first platform and horizontal well A adjacent end respectively;
4.2) parallelly with described horizontal well C be arranged side by side two mouthfuls of water horizontal wells, two mouthfuls of water horizontal wells are separately positioned on the both sides of horizontal well C; Shape Mitsui in a row;
4.3) according to step 4.2) formed one row Mitsui be arranged symmetrically with row's Mitsui at the opposite side of the second platform, formed two row six wells; These two rows, six wells are symmetrical in the dot center centered by the second platform of projection in the horizontal plane.
2. shale gas exploitation well-arranging procedure according to claim 1, it is characterized in that, described step 2.1) in, near-end distance first platform of horizontal well A be greater than or equal to 1/2 of the horizontal section length of horizontal well along Y direction distance, and being less than 1/2 of the horizontal section length of horizontal well along Y direction distance and adding 100 meters of the near-end of horizontal well A distance the first platform.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111322056A (en) * | 2020-03-02 | 2020-06-23 | 中国石油大学(北京) | Continental facies shale gas development well type determination method and device |
| CN112943211A (en) * | 2021-05-06 | 2021-06-11 | 中国石油天然气股份有限公司青海油田分公司 | Horizontal well spacing method applied to carbonate reservoir |
| CN115478831A (en) * | 2021-05-31 | 2022-12-16 | 中国石油天然气股份有限公司 | Well spacing method and device for oil-gas resources in hydrocarbon source rock |
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| CN103216234A (en) * | 2013-04-23 | 2013-07-24 | 中国地质科学院勘探技术研究所 | Horizontal branch multi-well-group butted well and construction method thereof |
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| CN103216234A (en) * | 2013-04-23 | 2013-07-24 | 中国地质科学院勘探技术研究所 | Horizontal branch multi-well-group butted well and construction method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111322056A (en) * | 2020-03-02 | 2020-06-23 | 中国石油大学(北京) | Continental facies shale gas development well type determination method and device |
| CN111322056B (en) * | 2020-03-02 | 2021-06-11 | 中国石油大学(北京) | Continental facies shale gas development well type determination method and device |
| CN112943211A (en) * | 2021-05-06 | 2021-06-11 | 中国石油天然气股份有限公司青海油田分公司 | Horizontal well spacing method applied to carbonate reservoir |
| CN115478831A (en) * | 2021-05-31 | 2022-12-16 | 中国石油天然气股份有限公司 | Well spacing method and device for oil-gas resources in hydrocarbon source rock |
| CN115478831B (en) * | 2021-05-31 | 2023-08-22 | 中国石油天然气股份有限公司 | Well-arrangement method and device for oil-gas resources in hydrocarbon source rock |
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Application publication date: 20150708 |