CN1294415C - Method for indicating natural gas exploration using drill well liquid tank top gas combining gas phase chromatography logging well - Google Patents
Method for indicating natural gas exploration using drill well liquid tank top gas combining gas phase chromatography logging well Download PDFInfo
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- CN1294415C CN1294415C CNB2004100779341A CN200410077934A CN1294415C CN 1294415 C CN1294415 C CN 1294415C CN B2004100779341 A CNB2004100779341 A CN B2004100779341A CN 200410077934 A CN200410077934 A CN 200410077934A CN 1294415 C CN1294415 C CN 1294415C
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- 239000007789 gas Substances 0.000 title claims abstract description 111
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000003345 natural gas Substances 0.000 title abstract description 15
- 239000007788 liquid Substances 0.000 title abstract 4
- 238000004587 chromatography analysis Methods 0.000 title abstract 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 69
- 238000005553 drilling Methods 0.000 claims abstract description 31
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 27
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 25
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 25
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000001307 helium Substances 0.000 claims abstract description 11
- 229910052734 helium Inorganic materials 0.000 claims abstract description 11
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000011156 evaluation Methods 0.000 claims abstract description 10
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 7
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 5
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims abstract description 3
- 239000011435 rock Substances 0.000 claims description 60
- 229910052757 nitrogen Inorganic materials 0.000 claims description 34
- 239000012530 fluid Substances 0.000 claims description 28
- 239000001257 hydrogen Substances 0.000 claims description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
- 239000000306 component Substances 0.000 claims description 2
- -1 normal heptane hydrocarbon Chemical class 0.000 claims description 2
- 230000032696 parturition Effects 0.000 claims description 2
- 229910001873 dinitrogen Inorganic materials 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 abstract 1
- 238000004458 analytical method Methods 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 8
- 238000004817 gas chromatography Methods 0.000 description 5
- 238000013508 migration Methods 0.000 description 5
- 230000005012 migration Effects 0.000 description 5
- 238000005336 cracking Methods 0.000 description 4
- 239000005416 organic matter Substances 0.000 description 4
- 241000272525 Anas platyrhynchos Species 0.000 description 3
- GMACPFCYCYJHOC-UHFFFAOYSA-N [C].C Chemical compound [C].C GMACPFCYCYJHOC-UHFFFAOYSA-N 0.000 description 3
- 239000012159 carrier gas Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005119 centrifugation Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000011234 economic evaluation Methods 0.000 description 2
- 229910001872 inorganic gas Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002808 molecular sieve Substances 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- VTZXIIRJVXXXBO-UHFFFAOYSA-N C(=O)=O.[N].CC.C Chemical compound C(=O)=O.[N].CC.C VTZXIIRJVXXXBO-UHFFFAOYSA-N 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000000274 adsorptive effect Effects 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000011157 data evaluation Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012252 genetic analysis Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen(.) Chemical compound [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
Abstract
The present invention discloses a method for indicating natural gas exploration. The method comprises the following steps: step 1, the chromatographic analysis is adopted to detect the relative amount of organic gaseous components and inorganic gaseous components in tank top gas of drilling liquid in an oil gas showing section of a well so as to determine main hydrocarbon components and main nonhydrocarbon components in natural gas and evaluate the natural gas; step 2, sources of the main components of the natural gas are respectively analyzed so as to determine a terrane position of a hydrocarbon source generated by the natural gas; step 3, the exploration of regional natural gas is guided according to the terrane position of the hydrocarbon source generated by the natural gas and an evaluation result of the natural gas, wherein in the step 1, the organic gaseous components and the inorganic gaseous components which can be detected include hydrocarbon components within the range from firedamp to normal heptane, nitrogen gas, carbon dioxide, helium gas, hydrogen gas and hydrogen sulfide. The invention adopts the gas phase chromatographic geochemical logging technology from the tank top gas of the drilling liquid to detect the relative amount of the organic gaseous components and the inorganic gaseous components in the drilling liquid in the oil gas showing section of the well, evaluate the natural gas, and determine the main source of the gas, which has important significance in indicating regional natural gas exploration and reducing the risk of exploration.
Description
Technical field
The invention belongs to oil and gas well drilling engineering field,, thereby determine that rock gas type and source instruct the method for gas prospecting particularly by analysis to organic and inorganic gaseous component relative content in the show of oil and gas well section drilling fluid in creeping into.
Background technology
Drilling fluid is the blood of oil and gas well drilling engineering and the carrier of cutting carring, wash away at drilling fluid, resident fluid such as cutting carring returns in the surface process, material under actings in conjunction such as stratum and wellbore pressure, temperature in landwaste and the drilling fluid adsorbs exchange mutually, be a dynamic process, as shown in Figure 1.
When the content of organic matter is high in the drilling fluid, can pollute landwaste, and organic matter also can be carried absorption by drilling fluid in the landwaste, therefore, the mensuration of organic equal size and variation characteristic in the drilling fluid are geological syntheses well logging identification resident fluid and evaluating reservoir and show of oil and gas standard feature.Conventional technique of geochemical logging such as rock pyrolysis, landwaste head space gas lighter hydrocarbons etc., be detected object mainly then with organic matter in landwaste and the rock core, come evaluating hydrocarbon primary rock producing hydrocarbon ability and reservoir rock oil-gas possibility by organic absolute content and variation characteristic in the mensuration landwaste, often ignore detection to drilling fluid, do not detect the detection method of organic and inorganic gas component in the drilling fluid, thereby organic in the drilling fluid and inorganic gas component concentration there is not record, lack the method for estimating rock gas and source, and the height of non-hydrocarbon gas content is the important indicator of exploration economic evaluation in the rock gas.
The innovation and creation content
The purpose of this invention is to provide a kind of method that instructs gas prospecting from drilling fluid tank deck gas composition gas chromatography logging data evaluation rock gas.
The present invention instructs the method for gas prospecting, may further comprise the steps:
Step 1: organic and inorganic gaseous component relative content in the show of oil and gas well section drilling fluid tank deck gas during chromatograph detects and creeps into, determine main hydrocarbon component and non-hydrocarbon component in the rock gas, carry out the rock gas evaluation;
Step 2: rock gas key component source is analyzed respectively, determined the hydrocarbon source rock position of its Cheng Sheng;
Step 3: the hydrocarbon source rock position and the rock gas evaluation result of giving birth to according to natural pneumatolytic instruct regional gas prospecting.
In the above-mentioned method that instructs gas prospecting, the organic and inorganic gaseous component that can detect in the step 1 is that methane is to normal heptane hydrocarbon component, nitrogen, carbon dioxide, helium, hydrogen and sulfuretted hydrogen.
In the above-mentioned method that instructs gas prospecting, the described rock gas evaluation criterion of step 1 is: what methane accounted for hydrocarbon gas component in the rock gas is dry gas more than 95%, it below 95% moisture, helium content was greater than 0.1% o'clock in the described rock gas, from rock gas, separate helium commercial value is arranged, described rock gas nitrogen, carbon dioxide content height, then the gas industry using value is low.
The present invention utilizes drilling fluid tank deck gas to form the gas chromatography technique of geochemical logging, organic and inorganic gaseous component relative content in the show of oil and gas well section drilling fluid during detection is crept into, determine the gas main source, to instruct this area's gas prospecting, to reduce exploration risk significant.
Description of drawings
Fig. 1 is the material absorption exchange synoptic diagram in landwaste and the drilling fluid
Embodiment
Below in conjunction with specific embodiment in detail the present invention is described in detail.
1, sample collecting and processing
Creep into drilling fluid and must gather 90% of jar cumulative volume with sampling jar (with the landwaste head space gas) before shaking screen, the collection spacing is the same with the landwaste head space gas or definite as required.
Adopting draining to get the gas method takes out drilling fluid tank deck gas.
2, analytical approach
Drilling fluid tank deck gas is formed gas chromatography respectively by following condition analysis.
(1) O
2, N
2, CH
4, the CO component analysis: detecting device TCD, bridge stream 150mA, 70 ℃; Carrier gas: He, flow 30mL/min; Chromatographic column: long 2000mm, internal diameter 3mm, fill 40 ℃ of 5A molecular sieve, column temperatures.
(2) H
2, the He component analysis: carrier gas: N
2, flow 30mL/min; Chromatographic column: long 2000mm, internal diameter 3mm, fill 40 ℃ of 5A molecular sieve, column temperatures; Detecting device TCD, bridge stream 100mA, 30 ℃ of temperature.
(3) hydro carbons, CO
2, H
2Component analyses such as S: carrier gas He, flow 30mL/min; Chromatographic column: long 3000mm, internal diameter 3mm, fill PorapaQ, 60 ℃ of post initial temperatures, constant temperature 2min, be raised to 240 ℃ with 8 ℃/min; Detecting device TCD, bridge stream 150mA, 70 ℃ of temperature.
(4) qualitative and quantitative: adopt standard specimen, retention time etc. qualitative; Adopt area normalization standard measure (deduction air).
3, drilling fluid tank deck gas component color analysis of spectrum dynamic monitoring
Monitor at Qaidam the northern fringe duck dark 1 dark preparatory reconnaissance borehole, drilling fluid tank deck gas is formed chromatogram analysis data and is seen Table 1, find out that therefrom component concentration variation range methane is 8.009%～61.128%, ethane 0.000%～0.080%, nitrogen 38.573%～90.505%, carbon dioxide 0.007%～1.777%, hydrogen 0.000%～0.622%.As seen, this well rock gas key component is methane and nitrogen.
Table 1 drilling fluid tank deck gas is formed chromatogram analysis data %
| Well section m | Layer position | Methane | Ethane | Nitrogen | Carbon dioxide | Hydrogen | Density g/cm 3 |
| 2518～2520 | N 2 2 | 8.009 | 0.031 | 91.505 | 0.007 | 0.358 | 0.9307 |
| 3184～3186 | N 2 1 | 57.718 | 0.017 | 41.207 | 1.057 | / | 0.7349 |
| 4236-4241 | N 2 1 | 61.128 | 0.080 | 38.573 | 0.053 | 0.166 | 0.7137 |
| 4626-4629 | N 1 | 47.101 | / | 51.122 | 1.777 | / | 1.0116 |
| 4890-4892 | N 1 | 49.225 | 0.026 | 49.892 | 0.236 | 0.622 | 0.7598 |
| 4948-4949 | N 1 | 9.661 | 0.007 | 89.357 | 0.617 | 0.358 | 0.9277 |
4, rock gas evaluation and genetic analysis
Pyrolysis origin cause of formation gas evaluation criterion: what methane accounted for hydrocarbon gas component is dry gas more than 95%, is moisture below 95%.It is generally acknowledged in the natural gas of industry helium content greater than 0.1% o'clock, separating helium from rock gas just has commercial value, and nitrogen, then the gas industry using value is low for carbon dioxide content height (especially nitrogen).Therefore, the height of non-hydrocarbon gas content is the important indicator of exploration economic evaluation in the rock gas.Form chromatogram analysis data (table 1) from drilling fluid tank deck gas of the present invention and learn that the dark 1 well rock gas of duck is rich nitrogen or natural gas with high nitrogen, hydrogen richness is higher relatively, and nitrogen does not detect, C
1/ C
2＞700, methane accounts for more than 99% of hydrocarbon gas component, belongs to dry gas.
This well 3517.5m, 4626-4629m, 4861-4866m gas constituent isotopes δ
13C
1Be respectively-23.4 ‰ ,-33.3 ‰ ,-26.5 ‰, to join 3 well rock gas Methane Carbon Isotope values approaching with contiguous duck, and these well section rock gases have post-mature coal-related gas feature, infer hydrocarbon source rock Ro thus greater than 3.0%, and source of the gas is the deep layer Jurassic source rocks.
Nitrogen is one of modal non-hydrocarbon component in the rock gas, and content is generally less than 10%, and three kinds of organic origins, the atmosphere origin cause of formation, magmatic origin have been it is generally acknowledged in the source of nitrogen in the rock gas.Organic origin is the main source of nitrogen in the rock gas, promptly generates at the biological chemistry transformation process of the nitride of rock disseminated organic matter or oil nitride or thermocatalysis transformation process, and the relative petroliferous gas of biogas more is rich in nitrogen; The atmosphere origin cause of formation be because surface water and phreatic ringing, bring into the nitrogen in the atmosphere underground, and separate out and enter gas reservoir or reservoir, the nitrogen of this class origin cause of formation often is enriched in the superficial part stratum, in addition, rock gas in the coal seam (generally all at 200-800m) nitrogen content height, high reaches more than 90%, generally also belongs to the atmosphere origin cause of formation; Magmatogene rich nitrogen or high nitrogen rock gas often with the positive correlation of high helium content.
Helium content is very low in this well rock gas, and institute's sample thief does not all detect, and explanation is not a magmatic origin thus; From by shallow-layer to deep layer nitrogen content, the possibility of the atmosphere origin cause of formation is little; According to Zhang Yuenian (1999) result of study, deposition is organic, and (temperature is above 300 ℃ in the post-mature stage, Ro is greater than 3.0%) nitrogen that produces of cracking is the main source of natural gas with high nitrogen (nitrogen is greater than 50%), because rock is big to the adsorptive power of nitrogen and methane and the dissolubility difference in water, after their mixed gas is migrated through 1000m, nitrogen gas concn can improve 6%-18% than methane concentration, rock gas is by migration, the concentration maximum of nitrogen can improve 22-25%, this shows, the formation of natural gas with high nitrogen is except possessing organic cracking condition, and effective geochromatography centrifugation takes place the long distance migration of rock gas is main cause; It is declared and knows sign, and to be producing region Methane Carbon Isotope value that post-mature hydrocarbon source rock, association arranged be-30 ‰～-20 ‰ etc., and this well natural air-air source is a Jurassic source rocks, organic Ro greater than 2.0%, the Methane Carbon Isotope value is-33.3 ‰～-23.4 ‰, migration distance judges that thus nitrogen is that the organic cracking of Jurassic source rocks, long distance migration produce in the rock gas more than 10000m.In addition, mud additive (especially ammonium salt) interacts under formation condition and produces nitrogen, sneaks into institute and gets in the gas sample, makes nitrogen content height in the gas sample, also is one of reason.
The present invention utilizes drilling fluid tank deck gas to form the gas chromatography technique of geochemical logging, detected and crept into organic and inorganic gaseous component relative content in the middle show of oil and gas well section drilling fluid, think that this well rock gas belongs to rich nitrogen or high nitrogen rock gas, mainly from the deep layer Jurassic source rocks; Rich nitrogen or high nitrogen rock gas mainly are because the long distance migration of organic cracking of deep layer Jurassic source rocks and rock gas takes place due to the effective geochromatography centrifugation, this to instruct this area's gas prospecting, to reduce exploration risk significant.
Claims (1)
1, a kind of method that instructs gas prospecting may further comprise the steps:
Step 1: organic and inorganic gaseous component relative content in the show of oil and gas well section drilling fluid tank deck gas during chromatograph detects and creeps into, determine main hydrocarbon component and non-hydrocarbon component in the rock gas, described organic and inorganic gaseous component is that methane is to normal heptane hydrocarbon component, nitrogen, carbon dioxide, helium, hydrogen and sulfuretted hydrogen; Carry out the rock gas evaluation with the rock gas evaluation criterion, described rock gas evaluation criterion is: what methane accounted for hydrocarbon gas component in the rock gas is dry gas more than 95%, it below 95% moisture, helium content was greater than 0.1% o'clock in the described rock gas, from rock gas, separate helium commercial value is arranged, described rock gas nitrogen, carbon dioxide content height, then the gas industry using value is low.
Step 2: rock gas key component source is analyzed respectively, determined the hydrocarbon source rock position of its Cheng Sheng;
Step 3: the hydrocarbon source rock position and the rock gas evaluation result of giving birth to according to natural pneumatolytic instruct regional gas prospecting.
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|---|---|---|---|
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|---|---|---|---|
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|---|---|
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| CN1294415C true CN1294415C (en) | 2007-01-10 |
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| CN102998406A (en) * | 2012-10-12 | 2013-03-27 | 苏州金宏气体股份有限公司 | Method for detecting content of carbon dioxide in natural gas |
| CN104730595B (en) * | 2015-04-16 | 2015-11-04 | 中国石油大学(华东) | A kind of deep layer Foregone pool fills direction and approach tracing method |
| CN105866294A (en) * | 2016-06-01 | 2016-08-17 | 中国石油天然气股份有限公司 | Method for identifying organic and inorganic causes and sources of N2 |
| CN107392505A (en) * | 2017-08-24 | 2017-11-24 | 中国石油集团渤海钻探工程有限公司 | Natural gas hydrate exploration develops well logging engineering comprehensive explanation evaluating method |
| CN110470762B (en) * | 2019-08-22 | 2021-11-02 | 陕西延长石油(集团)有限责任公司研究院 | Method for improving accuracy of quantitative evaluation of maturity of hydrocarbon source rock by aromatic hydrocarbon parameters |
| CN111398557A (en) * | 2020-03-26 | 2020-07-10 | 太原理工大学 | Method for accurately identifying residual coal gas extraction proportion of mining area |
| CN115182724A (en) * | 2021-03-26 | 2022-10-14 | 中国石油天然气股份有限公司 | Shale gas potential prediction method and device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2854396A (en) * | 1954-11-24 | 1958-09-30 | Jersey Prod Res Co | Petroleum prospecting |
| US3196664A (en) * | 1959-07-15 | 1965-07-27 | Nat Lead Co | Process of employing frontal analysis chromatography in well logging |
| US4765182A (en) * | 1986-01-13 | 1988-08-23 | Idl, Inc. | System and method for hydrocarbon reserve evaluation |
| RU2183335C1 (en) * | 2001-08-21 | 2002-06-10 | Копилевич Ефим Абрамович | Geophysical prospecting method for determining oil-yielding types of geological profile |
| CN1162698C (en) * | 2002-04-11 | 2004-08-18 | 海城市石油化工仪器厂 | Drilling mud and crumb hydrocarbon analysis method |
| RU2236030C1 (en) * | 2003-09-04 | 2004-09-10 | Закрытое акционерное общество Моделирование и мониторинг геологических объектов им. В.А.Двуреченского | Geophysical prospecting method for evaluating oil productivity of porous reservoirs in croswell space |
-
2004
- 2004-09-20 CN CNB2004100779341A patent/CN1294415C/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2854396A (en) * | 1954-11-24 | 1958-09-30 | Jersey Prod Res Co | Petroleum prospecting |
| US3196664A (en) * | 1959-07-15 | 1965-07-27 | Nat Lead Co | Process of employing frontal analysis chromatography in well logging |
| US4765182A (en) * | 1986-01-13 | 1988-08-23 | Idl, Inc. | System and method for hydrocarbon reserve evaluation |
| RU2183335C1 (en) * | 2001-08-21 | 2002-06-10 | Копилевич Ефим Абрамович | Geophysical prospecting method for determining oil-yielding types of geological profile |
| CN1162698C (en) * | 2002-04-11 | 2004-08-18 | 海城市石油化工仪器厂 | Drilling mud and crumb hydrocarbon analysis method |
| RU2236030C1 (en) * | 2003-09-04 | 2004-09-10 | Закрытое акционерное общество Моделирование и мониторинг геологических объектов им. В.А.Двуреченского | Geophysical prospecting method for evaluating oil productivity of porous reservoirs in croswell space |
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Effective date of registration: 20220105 Address after: Heilongjiang Province, Daqing City Ranghulu District 163453 Patentee after: Daqing Oilfield Co.,Ltd. Patentee after: PetroChina Company Limited Address before: Daqing Ranghulu District 163453 in Heilongjiang Province Patentee before: Daqing Oilfield Co.,Ltd. |
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Granted publication date: 20070110 |