CN105952446A - Measurement method for component content of petroleum and natural gas reservoir - Google Patents
Measurement method for component content of petroleum and natural gas reservoir Download PDFInfo
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- CN105952446A CN105952446A CN201610262683.7A CN201610262683A CN105952446A CN 105952446 A CN105952446 A CN 105952446A CN 201610262683 A CN201610262683 A CN 201610262683A CN 105952446 A CN105952446 A CN 105952446A
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 112
- 239000003209 petroleum derivative Substances 0.000 title claims abstract description 21
- 239000003345 natural gas Substances 0.000 title abstract description 6
- 238000000691 measurement method Methods 0.000 title abstract 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 112
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 56
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 55
- 238000012360 testing method Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 60
- 238000004458 analytical method Methods 0.000 claims description 16
- 238000003556 assay Methods 0.000 claims description 16
- 238000004364 calculation method Methods 0.000 claims description 12
- 238000002474 experimental method Methods 0.000 claims description 9
- 238000009530 blood pressure measurement Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 64
- 238000005070 sampling Methods 0.000 abstract 1
- 238000011161 development Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004445 quantitative analysis Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000004836 empirical method Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000004868 gas analysis Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000011158 quantitative evaluation Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
- E21B47/07—Temperature
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a measurement method for component content of a petroleum and natural gas reservoir capable of increasing precision of a content calculating result. The method comprises following steps: S1, sampling downhole gas in a high temperature and high pressure gas reservoir; S2, obtaining multiple groups of data such as volume density parameters, methane and carbon dioxide content, temperature parameters and pressure parameters; S3, fitting multiple groups of data in order to construct a primary calculating model of methane and carbon dioxide content changing with gas volume density, temperature and pressure; S4, selecting stratum pressure-testing data in gas reservoir sections and selecting different depths to measure stratum pressure, calculate pressure gradients and converting to volume density value; actually measuring in order to obtain temperature value of gas layer sections and substituting them into a content-calculating model in order to obtain content of methane and carbon dioxide in a high-temperature high-pressure stratum.
Description
Technical field
The present invention relates to the logging evaluation technology during a kind of oil-gas exploration, particularly relate to a kind of petroleum gas gas-bearing formation component content assay method.
Background technology
In High Temperature High Pressure gas-bearing formation, the quantitative assessment of methane (CH4) and carbon dioxide (CO2) content is one of key technology of THE WESTERN SOUTH CHINA SEA basin High Temperature High Pressure natural gas reservoir exploration and development.
Utilize the research methods innovation that in stratum pressure measurement data quantitative Analysis High Temperature High Pressure gas-bearing formation, methane (CH4) and carbon dioxide (CO2) content belong in natural gas exploration and development field, mainly by stratum pressure measurement data and gas analysis sample experimental data, research methane (CH4) and carbon dioxide (CO2) content are to gas volume density, dependency relation between temperature and pressure, finally set up High Temperature High Pressure gas-bearing formation methane (CH4) and carbon dioxide (CO2) content quantitative evaluation model, thus quickly, accurately calculate methane (CH4) and carbon dioxide (CO2) content, test layer bit decisions foundation is provided for natural gas exploration and development, gas field exploration is instructed to develop.
Existing methane (CH4) and carbon dioxide (CO2) content method mostly are region empirical method, use neutron, density curve to construct corresponding computation model.But neutron, density curve are affected by factors such as lithology, borehole condition, mud immersions simultaneously, thus result in directly utilize these methods calculate gas-bearing formation methane (CH4) with carbon dioxide (CO2) contain accuracy of measurement relatively low, through statistics, gas-bearing formation gas content is up to more than 50% with test sample analysis result absolute error, produces to the construction of natural gas fields and brings the biggest difficulty.
Summary of the invention
Not enough for prior art, the technical problem to be solved in the present invention is to provide and a kind of can improve the petroleum gas gas-bearing formation component content assay method of methane and carbon dioxide content quantitative Analysis result precision in High Temperature High Pressure gas-bearing formation.
In order to overcome prior art not enough, the technical solution used in the present invention is: a kind of petroleum gas gas-bearing formation component content assay method, for measuring methane and the content of carbon dioxide in petroleum gas, described petroleum gas gas-bearing formation component content assay method comprises the following steps:
S1, High Temperature High Pressure gas-bearing formation mine gas are sampled: utilize sample apparatus to choose from well site, High Temperature High Pressure gas field and organize gaseous sample more, measure the pressure and temperature of sample position simultaneously；
S2, acquisition many groups test experiments data: the temperature actual according to gas sample gas-bearing formation section and design of pressure experiment condition, gaseous sample is carried out the determination test of bulk density and methane with carbon dioxide content, obtains the multi-group data being made up of with carbon dioxide content, temperature parameter and pressure parameter bulk density parameter, methane；
S3, structure primary calculations model: utilize the data fitting analyzing method in mathematical statistics category, above-mentioned multi-group data is carried out parameter fitting, respectively obtain the primary calculations model that methane changes with gas volume density, temperature and pressure with carbon dioxide content；
S4, acquisition High Temperature High Pressure gas-bearing formation section methane and carbon dioxide content: enroll stratum pressure measurement data in High Temperature High Pressure gas-bearing formation section, acquired gas-bearing formation section formation pressure data is processed, choose different depth and measure obtained formation pressure data, calculate pressure relative depth straight slope as barometric gradient, andConversionObtain gas-bearing formation section gas volume density value；The temperature of High Temperature High Pressure gas-bearing formation is carried out actually detected, obtains the temperature value of gas-bearing formation section, gas volume density, temperature, value formation pressure are updated to methane and calculate in model with CO2 meter, obtains methane and carbon dioxide content in High Temperature High Pressure gas-bearing formation.
A kind of improvement as the technical scheme of petroleum gas gas-bearing formation component content assay method of the present invention, in step 3, described primary calculations model is: X=146.5*xep (-5.51* (den*log (T/P)/log (P))), Y=64.782*ln (den*log (T/P)/log (P))+142.35；Wherein, X is the methane content that experimental analysis obtains, unit be %, Y be the carbon dioxide content that experimental analysis obtains, unit is %；Den is that experimental analysis obtains gas volume density value, and unit is g/cm3；T is temperature value, and unit is DEG C；P is force value, and unit is MPa.
As a kind of improvement of the technical scheme of petroleum gas gas-bearing formation component content assay method of the present invention, in step 2, fluid volume penetron is used to measure the bulk density of gaseous sample；The content of methane and carbon dioxide is measured by gas component spectroanalysis instrument.
As a kind of improvement of the technical scheme of petroleum gas gas-bearing formation component content assay method of the present invention, in step 2, altogether obtain 40 ~ 50 groups of test experiments data.
The invention has the beneficial effects as follows: the present invention is when utilizing the aforementioned two kinds of gas contents of stratum pressure measurement data quantitative Analysis, avoid Logging Curves such as density, neutron data easily to be affected by factors such as lithology, borehole condition, slurry compounding and cause gas content computational accuracy problem on the low side, within making High Temperature High Pressure gas-bearing formation methane (CH4) be reduced to 10% with test sample analysis result absolute error by existing 50% with carbon dioxide (CO2) content quantitative result of calculation.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the present invention a kind of petroleum gas gas-bearing formation component content assay method.
Fig. 2 is methane content primary calculations illustraton of model in the present invention.
Fig. 3 is carbon dioxide content primary calculations illustraton of model in the present invention.
Detailed description of the invention
Below embodiments of the present invention are specifically described.
With reference to the flow chart shown in Fig. 1, figure illustrates one petroleum gas gas-bearing formation component content assay method of the present invention, for measuring methane and the content of carbon dioxide in petroleum gas, described petroleum gas gas-bearing formation component content assay method comprises the following steps:
S1, High Temperature High Pressure gas-bearing formation mine gas are sampled: utilize sample apparatus to choose from well site, High Temperature High Pressure gas field and organize gaseous sample more, measure the pressure and temperature of sample position simultaneously.
S2, acquisition many groups test experiments data: the temperature actual according to gas sample gas-bearing formation section and design of pressure experiment condition, gaseous sample is carried out the determination test of bulk density and methane with carbon dioxide content, obtains the multi-group data being made up of with carbon dioxide content, temperature parameter and pressure parameter bulk density parameter, methane.
S3, structure primary calculations model: utilize the data fitting analyzing method in mathematical statistics category, above-mentioned multi-group data is carried out parameter fitting, respectively obtain the primary calculations model that methane changes with gas volume density, temperature and pressure with carbon dioxide content.
Specifically comprise the following steps that to state the Changing Pattern between methane (CH4) and carbon dioxide (CO2) content and bulk density, temperature and pressure more preferably, more accurately, take to optimize data Fitting Analysis, first temperature, pressure parameter are carried out Treatment Analysis, respectively obtain the scatterplot being combined into X-coordinate with methane (CH4) and carbon dioxide (CO2) content and bulk density, temperature and pressure three parameter group.In a particular embodiment, experimental data is processed, being combined into abscissa, methane (CH4) with bulk density, temperature and pressure three parameter group is that vertical coordinate sets up scatterplot with carbon dioxide (CO2) content, as shown in Figure 2 and Figure 3, wherein, X is methane (CH4) content that experimental analysis obtains, and unit is (%), Y is carbon dioxide (CO2) content that experimental analysis obtains, and unit is (%)；Den is that experimental analysis obtains gas volume density value, and unit is (g/cm3)；T is temperature value, and unit is (DEG C)；P is force value, and unit is (MPa)；In figure, R2 represent each fitting formula correlation coefficient square, the dependency of the biggest representation formula of this value is the best.
S4, acquisition High Temperature High Pressure gas-bearing formation section methane and carbon dioxide content: enroll stratum pressure measurement data in High Temperature High Pressure gas-bearing formation section, acquired gas-bearing formation section formation pressure data is processed, choose different depth and measure obtained formation pressure data, calculate pressure relative depth straight slope as barometric gradient, andConversionObtain gas-bearing formation section gas volume density value.On pressure with depth section, same pressure system, different depth are measured obtained formation pressure data, the most linear, the slope of straight line is the barometric gradient of this pressure system, and barometric gradient i.e. can get reservoir fluid bulk density value by simple conversion.The temperature of High Temperature High Pressure gas-bearing formation is carried out actually detected, obtains the temperature value of gas-bearing formation section, gas volume density, temperature, value formation pressure are updated to methane and calculate in model with CO2 meter, obtains methane and carbon dioxide content in High Temperature High Pressure gas-bearing formation.
More preferably, step 3, primary calculations model is: X=146.5*xep (-5.51* (den*log (T/P)/log (P))), Y=64.782*ln (den*log (T/P)/log (P))+142.35；Wherein, X is the methane content that experimental analysis obtains, unit be %, Y be the carbon dioxide content that experimental analysis obtains, unit is %；Den is that experimental analysis obtains gas volume density value, and unit is g/cm3；T is temperature value, and unit is DEG C；P is force value, and unit is MPa.
More preferably, in step 2, fluid volume penetron is used to measure the bulk density of gaseous sample；Measured the content of methane and carbon dioxide by gas component spectroanalysis instrument, obtain content data more accurately, thus set up model and summit mensuration offer foundation for follow-up.
More preferably, in step 2,40 ~ 50 groups of test experiments data are altogether obtained so that the model of foundation is more accurate, more closing to reality, thus promotes accuracy.
The above disclosed the preferred embodiments of the present invention that are only, certainly can not limit the interest field of the present invention, the equivalent variations therefore made according to scope of the present invention patent with this, still belong to the scope that the present invention is contained.
Claims (4)
1. a petroleum gas gas-bearing formation component content assay method, for measuring methane and the content of carbon dioxide in petroleum gas, it is characterised in that described petroleum gas gas-bearing formation component content assay method comprises the following steps:
S1, High Temperature High Pressure gas-bearing formation mine gas are sampled: utilize sample apparatus to choose from well site, High Temperature High Pressure gas field and organize gaseous sample more, measure the pressure and temperature of sample position simultaneously；
S2, acquisition many groups test experiments data: the temperature actual according to gas sample gas-bearing formation section and design of pressure experiment condition, gaseous sample is carried out the determination test of bulk density and methane with carbon dioxide content, obtains the multi-group data being made up of with carbon dioxide content, temperature parameter and pressure parameter bulk density parameter, methane；
S3, structure primary calculations model: utilize the data fitting analyzing method in mathematical statistics category, above-mentioned multi-group data is carried out parameter fitting, respectively obtain the primary calculations model that methane changes with gas volume density, temperature and pressure with carbon dioxide content；
S4, acquisition High Temperature High Pressure gas-bearing formation section methane and carbon dioxide content: enroll stratum pressure measurement data in High Temperature High Pressure gas-bearing formation section, acquired gas-bearing formation section formation pressure data is processed, choose different depth and measure obtained formation pressure data, calculate pressure relative depth straight slope as barometric gradient, andConversionObtain gas-bearing formation section gas volume density value；The temperature of High Temperature High Pressure gas-bearing formation is carried out actually detected, obtains the temperature value of gas-bearing formation section, gas volume density, temperature, value formation pressure are updated to methane and calculate in model with CO2 meter, obtains methane and carbon dioxide content in High Temperature High Pressure gas-bearing formation.
Petroleum gas gas-bearing formation component content assay method the most according to claim 1, it is characterized in that: in step 3, described primary calculations model is: X=146.5*xep (-5.51* (den*log (T/P)/log (P))), Y=64.782*ln
(den*log(T/P)/log(P))+142.35；Wherein, X is the methane content that experimental analysis obtains, unit be %, Y be the carbon dioxide content that experimental analysis obtains, unit is %；Den is that experimental analysis obtains gas volume density value, and unit is g/cm3；T is temperature value, and unit is DEG C；P is force value, and unit is MPa.
Petroleum gas gas-bearing formation component content assay method the most according to claim 1, it is characterised in that: in step 2, use fluid volume penetron to measure the bulk density of gaseous sample；The content of methane and carbon dioxide is measured by gas component spectroanalysis instrument.
Petroleum gas gas-bearing formation component content assay method the most according to claim 1, it is characterised in that: in step 2, altogether obtain 40 ~ 50 groups of test experiments data.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110722469A (en) * | 2019-11-25 | 2020-01-24 | 郑州磨料磨具磨削研究所有限公司 | Large thickness-diameter ratio grinding tool forming pressure gradient measuring device |
| CN111173506A (en) * | 2019-12-31 | 2020-05-19 | 中国矿业大学(北京) | Carbon dioxide leakage monitoring method and device |
| CN113866380A (en) * | 2021-09-29 | 2021-12-31 | 中海石油(中国)有限公司 | High-coal-rank coal seam free gas content determination device and determination method |
| CN117310812A (en) * | 2023-09-27 | 2023-12-29 | 广东海洋大学 | Methane fluid longitudinal wave time difference skeleton parameter acquisition method |
| CN117969337A (en) * | 2024-03-28 | 2024-05-03 | 深圳市晶湖科技有限公司 | High-precision detection method and system for alkane content in natural gas |
| CN118248252A (en) * | 2024-04-12 | 2024-06-25 | 中海石油(中国)有限公司湛江分公司 | Carbon dioxide content parameter calculation method based on alkane carbon isotope |
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| CN118248252A (en) * | 2024-04-12 | 2024-06-25 | 中海石油(中国)有限公司湛江分公司 | Carbon dioxide content parameter calculation method based on alkane carbon isotope |
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