CN102914530A - Raman spectrum gas detection system as well as detection method and application thereof - Google Patents
Raman spectrum gas detection system as well as detection method and application thereof Download PDFInfo
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- CN102914530A CN102914530A CN2011102247096A CN201110224709A CN102914530A CN 102914530 A CN102914530 A CN 102914530A CN 2011102247096 A CN2011102247096 A CN 2011102247096A CN 201110224709 A CN201110224709 A CN 201110224709A CN 102914530 A CN102914530 A CN 102914530A
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Abstract
The invention belongs to the field of petroleum exploration and development and particularly relates to a system and a method for detecting by applying a Raman spectrum technology in the gas detection process of oil-gas logging. A Raman spectrum gas detection system comprises a sample pretreatment device, a Raman gas analyzer, a data signal processing module, a data communication module, a signal output display unit and a master control unit, wherein the sample pretreatment device is connected with the Raman gas analyzer and is used for inputting the pretreated gas in the Raman gas analyzer for analyzing components; the Raman gas analyzer is used for inputting the analyzed result to the data signal processing module; the data signal processing module is used for outputting the analysis result to the signal output display unit through the data communication module; and the master control unit is used for controlling the inputting of sample gas.
Description
Technical field
The invention belongs to oil exploration and development fields, relate in particular to the gas testing process in the oil gas well logging, use the system and method that Raman spectroscopy detects.
Background technology
Well logging is exploratory development " eyes ".Gas detection technology is the gordian technique of well logging, and the purpose one that mud logging gas detects is directly to find hydrocarbon zone, the 2nd, carry out the monitoring and warning of toxic and harmful, and the 3rd, find the non-hydrocarbon gases mineral reserve.
Normal hydrogen flame color spectrum SK-3Q04 and the infrared spectrum technology of adopting in the prior art during hydro carbons detects.And the problem that adopts the hydrogen flame color to compose SK-3Q04 is only to detect hydrocarbon gas; Auxiliary device is many, gas circuit is complicated, and the analyzing influence many factors is prone to fault; Component can not continuous monitoring; Detection speed and accuracy of detection can not reach efficient unification.And infrared spectrum technology spectrum unscrambling difficulty is large, and the component degree of separation is low; Few with the machine testing multiple gases; Accuracy of detection is lower, narrow range.
Prior art was used thermal conductance chromatogram SK-3R03 or the logical H2S detector of Green during hydro carbons detected.Thermal conductance chromatogram SK-3R03 generally detects H
2And CO
2Precision is low; Sulfurated hydrogen detection needs special-purpose detector.Nonhydrocarbon detector existing problems are basically corresponding a kind of detecting instruments of a kind of gas.
It is to detect hydrocarbon gas to terse integrated development, to the real-time analysis development with to various gas complete detection development by all kinds of detecting instrument combined types detections, the analysis of component sense cycle formula, emphasis that mud logging gas detects development trend.
Summary of the invention
The inventor utilizes Raman spectroscopy through studying for a long period of time.Its Raman spectrum principle: in the scattering spectrum of transparent medium, the composition that frequency is identical with incident light frequency v0 is called Rayleigh scattering.The composition v0-Δ v that frequency is less is called Stokes line.The composition v0+ Δ v that frequency is larger is called anti-stockes line.Spectral line or bands of a spectrum v0 ± Δ v that frequency is symmetrically distributed in the v0 both sides are Raman spectrum.(such as Fig. 1)
The present invention has researched and developed a kind of system and method that utilizes Raman spectrum to carry out analyzing and testing in order to solve the technical matters that exists in the prior art.
A kind of Raman spectrum gas detecting system, described system comprises sample pretreatment apparatus, Raman gas analyser, data-signal processing module, data communication module, signal output display unit and main control unit;
Described sample pretreatment apparatus be connected the Raman gas analyser and connect, be used for the pretreated gas input of described process Raman gas analyser is carried out constituent analysis; Described sample pretreatment apparatus is for being used for the dry decontamination process of flow process, dust in the preliminary filtering gas of 30 order core filter bulbs, again drying and the dry detected gas of condenser by in-built discolour silica gel drying agent.
Result after described Raman gas analyser will be analyzed inputs to described data-signal processing module; Described data-signal processing module is exported to described signal output display unit by described data communication module with analysis result; Described main control unit is used for the input of control sample gas.
In concrete application, described Raman gas analyser comprises admission line, exhaust line, sample gas analysis cavity, helium-neon laser plasma cell, optical instrument group and optical sensor;
Described admission line links to each other with sample gas analysis cavity entrance point, is provided with one group of optical sensor in described sample gas analysis cavity, and each optical sensor respectively corresponding its detects the gas of analyzing; Described helium-neon laser plasma cell produces laser beam, and by the acting in conjunction of optical instrument group sample gas is detected; Gas after the described detection is discharged by described exhaust line.
Comprise a particulate filter in the described Raman gas analyser on the admission line, refer to filter the filtrator of diameter＜0.2 μ m particle, be provided with pressure transducer at described exhaust line, flow sensor and pump detect and control the gas of discharging.
Described optical instrument group comprises catoptron, and totally two of prism and polariscopes, catoptron are positioned at the two ends of laser detector, and polariscope, each a slice of prism are positioned at the outer two ends of sample gas analysis cavity.The effect of catoptron, prism and polarizer is exactly to change laser direction, the effect of amplifying laser energy.See Fig. 2
Second inventive point of the present invention is, utilizes the Raman spectrum gas detecting system to carry out the method that gas detects,
The step that described detection method comprises is as follows: detection gas is methane, ethane, propane, isobutane, normal butane, CXHY (other hydro carbons mixed gass), hydrogen, carbon dioxide.
1, detect beginning, main control unit sends instruction;
2, the sample gas pre-treatment step;
3, Raman sample gas analytical procedure;
4, the analysis result data pre-treatment step.
1, the little current signal of gas sensor amplifies through the internal amplifier signal.2, built-in A/D capture card pick-up transducers amplifying signal is converted into concentration numerical value with electric signal according to demarcation by the master control acquisition software.3, the OPC service routine stores data into database, sends to other users by UDP, RS232, opc server.4, according to arranging and needs, by control devices such as other switches that need of built-in I/O card control, valve, relays.
5, data result output.
6, finish.
7, the present invention is applied in described Raman system in the field of gas detection of well logging.
The invention effect that the present invention realizes:
1, the fingerprint vibrational spectra is accurately identified gaseous species;
2, required sample size is few, does not need pre-service;
3, simultaneously Non-Destructive Testing of multicomponent sample;
4, analyze fast high spatial resolution;
5, substantially without utility appliance, failure rate is low.
6, can detect all kinds of gases except inert gas.Can realize quick, simple, undamaged quantitative and qualitative analysis.All has clear superiority at aspects such as continuity, reliability, accuracy, sensitivitys.
7, be used for steel-making, oil refining, chemical industry, heat treatment process gas on-line analysis and monitoring field.
Description of drawings
Fig. 1 is the Raman spectroscopy principle schematic
Fig. 2 is core instrument Raman analysis measuring device figure of the present invention
Fig. 3 is Raman gas analyser workflow diagram
Fig. 4 the present invention and 3Q04 show of oil and gas 1-2 layer comparison diagram
The 3rd layer of comparison diagram of Fig. 5 the present invention and 3Q04 show of oil and gas
Fig. 6 the present invention and 3Q04 practicality comparison diagram
Describe in connection with summary of the invention and embodiment
Embodiment
1, experiment contrast: in order more intuitively to understand the performance of raman laser gas analyzer, the present invention and upper sea God are opened the 3Q04 chromatogram test and contrast, see Table 1.
Table 1 Raman gas analyser and 3Q04 chromatographic performance laboratory experiment contrast table
2, on-the-spot contrast test:
Test method: simultaneously the present invention and 3Q04 chromatograph carry out the site mud logging operation, and whole process is carried out the oil gas monitoring.The test pit master data: new husky X well, the well type: horizontal well, test pit section: 0-3168.00m, test period: 61 days, 22 layers of show of oil and gas were explained in the Raman gas analysis altogether, show of oil and gas well section, explained that the number of plies is consistent with the 3Q04 chromatogram.See Fig. 3,4,5.
3, practicality contrast
1. Raman analysis instrument auxiliary device is few, failure rate is low, good stability.In 61 days site test, never break down; The 3Q04 chromatogram needs the equipment such as hydrogen generator, air compressor, and failure rate is relatively high; Therefore the Raman analysis instrument more can be guaranteed the discovery of show of oil and gas than the 3Q04 chromatogram.See Fig. 6.
2. 3Q04 chromatogram: component is periodicity analysis, and the relative total hydrocarbon of component lags behind, and influential to the identification of on-the-spot oil gas water, Raman spectrum: total hydrocarbon and component are one-to-one relationships, really accomplishes in real time, continuous detecting and analysis.
The present invention adopts the raman laser gas analyzer, has the ability that detects simultaneously hydro carbons and non-hydrocarbon gas, and the detection technique index meets the industry standard requirement, and the detection effect of hydrocarbon gas has been surpassed prior art.
System run all right of the present invention, failure rate is low, oil and gas anomaly find in time, data accurately and reliably, safety and environmental protection can satisfy on-the-spot gas detection logging requirement.The present invention is applied to the well logging scene with the raman laser gas analysis technology, is the once important exploration of domestic gas logging technology, for promoting the gas logging technology innovation positive role is arranged.
Claims (7)
1. a Raman spectrum gas detecting system is characterized in that, described system comprises sample pretreatment apparatus, Raman gas analyser, data-signal processing module, data communication module, signal output display unit and main control unit;
Described sample pretreatment apparatus be connected the Raman gas analyser and connect, be used for the pretreated gas input of described process Raman gas analyser is carried out constituent analysis; Result after described Raman gas analyser will be analyzed inputs to described data-signal processing module; Described data-signal processing module is exported to described signal output display unit by described data communication module with analysis result; Described main control unit is used for the input of control sample gas;
Described Raman gas analyser comprises admission line, exhaust line, sample gas analysis cavity, helium-neon laser plasma cell, optical instrument group and optical sensor;
The sample gas analysis cavity, the helium-neon laser plasma cell, this four part of optical instrument group and optical sensor belongs to laser detector, is the core apparatus of Raman spectrum gas detecting system;
Described admission line links to each other with sample gas analysis cavity entrance point, is provided with one group of optical sensor in described sample gas analysis cavity, and each optical sensor respectively corresponding its detects the gas of analyzing; Described helium-neon laser plasma cell produces laser beam, and by the acting in conjunction of optical instrument group sample gas is detected; Gas after the described detection is discharged by described exhaust line.
2. a kind of Raman spectrum gas detecting system according to claim 1, it is characterized in that, comprise a particulate filter in the described Raman gas analyser on the admission line, it filters the filtrator of diameter＜0.2 μ m particle, be provided with pressure transducer at described exhaust line, flow sensor and pump detect and control the gas of discharging.
3. a kind of Raman spectrum gas detecting system according to claim 1 is characterized in that, described optical instrument group comprises catoptron, and prism and polariscope are for the change laser direction of catoptron, prism and polarizer, amplifying laser energy.
4. a kind of Raman spectrum gas detecting system according to claim 1, it is characterized in that, described sample pretreatment apparatus is used for the clean hot-temperedization process of flow process, dust in the preliminary filtering gas of 30 order core filter bulbs, the drier detected gas of the drying by in-built discolour silica gel drying agent and condenser.
5. the Raman spectrum gas detecting system such as one of claim 1-4 carries out the method that gas detects, it is characterized in that,
The step that described detection method comprises is as follows:
1, detect beginning, main control unit sends instruction
2, the sample gas pre-treatment step;
3, Raman sample gas analytical procedure;
4, the analysis result data pre-treatment step:
Comprise, the little current signal of (1) gas sensor amplifies through the internal amplifier signal;
(2) built-in A/D capture card pick-up transducers amplifying signal is converted into concentration numerical value with electric signal according to demarcation by the master control acquisition software;
(3) the OPC service routine stores data into database, sends to other users by UDP, RS232, opc server;
(4) according to arranging and needs, by control devices such as other switches that need of built-in I/O card control, valve, relays;
5, data result output;
6, finish.
6. Raman spectrum gas detection method as claimed in claim 5 is characterized in that,
Detection gas is methane, ethane, propane, isobutane, normal butane, CXHY (other hydro carbons mixed gass), hydrogen, carbon dioxide.
7. application rights requires one of 1-4 described Raman spectrum gas detecting system, it is characterized in that, described Raman system is applied in the field of gas detection of well logging.
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Cited By (8)
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|---|---|---|---|---|
| CN103837520A (en) * | 2014-03-03 | 2014-06-04 | 上海理工大学 | Optic travelling wave cavity enhanced laser raman gas concentration detection device |
| CN104155286A (en) * | 2014-08-29 | 2014-11-19 | 四川九高科技有限公司 | Spectrum generator |
| CN104198461A (en) * | 2014-09-10 | 2014-12-10 | 宁波海恩光电仪器有限责任公司 | Industrial process gas analyzer based on Raman effect |
| CN104267019A (en) * | 2014-10-27 | 2015-01-07 | 武汉四方光电科技有限公司 | Gas concentration calibrating and detecting method for laser Raman gas analyzer |
| CN105784002A (en) * | 2016-05-16 | 2016-07-20 | 北京科技大学 | Temperature and pressure measuring device and testing method |
| CN106932378A (en) * | 2017-03-29 | 2017-07-07 | 浙江大学 | The on-line detecting system and method for a kind of sour gas composition based on Raman spectrum |
| CN108316920A (en) * | 2017-01-16 | 2018-07-24 | 中石化石油工程技术服务有限公司 | Downhole drill gas detection logging test device |
| CN113376096A (en) * | 2021-05-26 | 2021-09-10 | 商丘睿控仪器仪表有限公司 | Spectrum measurement while drilling system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103837520A (en) * | 2014-03-03 | 2014-06-04 | 上海理工大学 | Optic travelling wave cavity enhanced laser raman gas concentration detection device |
| CN103837520B (en) * | 2014-03-03 | 2017-05-03 | 上海理工大学 | Optic travelling wave cavity enhanced laser raman gas concentration detection device |
| CN104155286A (en) * | 2014-08-29 | 2014-11-19 | 四川九高科技有限公司 | Spectrum generator |
| CN104198461A (en) * | 2014-09-10 | 2014-12-10 | 宁波海恩光电仪器有限责任公司 | Industrial process gas analyzer based on Raman effect |
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| CN105784002A (en) * | 2016-05-16 | 2016-07-20 | 北京科技大学 | Temperature and pressure measuring device and testing method |
| CN105784002B (en) * | 2016-05-16 | 2018-04-03 | 北京科技大学 | A kind of temperature, pressure measurement apparatus and method of testing |
| CN108316920A (en) * | 2017-01-16 | 2018-07-24 | 中石化石油工程技术服务有限公司 | Downhole drill gas detection logging test device |
| CN106932378A (en) * | 2017-03-29 | 2017-07-07 | 浙江大学 | The on-line detecting system and method for a kind of sour gas composition based on Raman spectrum |
| CN113376096A (en) * | 2021-05-26 | 2021-09-10 | 商丘睿控仪器仪表有限公司 | Spectrum measurement while drilling system |
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Application publication date: 20130206 |