NL2036925A - Method for Precisely Determining the Hydrocarbon Accumulation Timing in Volcaniclastic Rocks Based on Mineral Dating and Fluid Inclusion Synergy - Google Patents
Method for Precisely Determining the Hydrocarbon Accumulation Timing in Volcaniclastic Rocks Based on Mineral Dating and Fluid Inclusion Synergy Download PDFInfo
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- 239000011435 rock Substances 0.000 title claims abstract description 65
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 52
- 239000011707 mineral Substances 0.000 title claims abstract description 52
- 229930195733 hydrocarbon Natural products 0.000 title claims abstract description 45
- 150000002430 hydrocarbons Chemical class 0.000 title claims abstract description 45
- 239000004215 Carbon black (E152) Substances 0.000 title claims abstract description 43
- 238000009825 accumulation Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000012530 fluid Substances 0.000 title claims abstract description 26
- 238000004458 analytical method Methods 0.000 claims abstract description 32
- 239000010426 asphalt Substances 0.000 claims abstract description 18
- 238000005070 sampling Methods 0.000 claims abstract description 15
- 239000007787 solid Substances 0.000 claims abstract description 15
- 230000009897 systematic effect Effects 0.000 claims abstract description 11
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 9
- 238000009826 distribution Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 238000000100 multiple collector inductively coupled plasma mass spectrometry Methods 0.000 claims description 6
- 239000005416 organic matter Substances 0.000 claims description 6
- 238000001953 recrystallisation Methods 0.000 claims description 6
- 238000001069 Raman spectroscopy Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000011065 in-situ storage Methods 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 238000009933 burial Methods 0.000 claims description 3
- 238000005056 compaction Methods 0.000 claims description 3
- 238000012937 correction Methods 0.000 claims description 3
- 238000012921 fluorescence analysis Methods 0.000 claims description 3
- 238000007710 freezing Methods 0.000 claims description 3
- 230000008014 freezing Effects 0.000 claims description 3
- 238000000265 homogenisation Methods 0.000 claims description 3
- 238000000608 laser ablation Methods 0.000 claims description 3
- 238000012417 linear regression Methods 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 238000000197 pyrolysis Methods 0.000 claims description 3
- 229910001748 carbonate mineral Inorganic materials 0.000 claims 2
- 238000000227 grinding Methods 0.000 claims 2
- 238000012935 Averaging Methods 0.000 claims 1
- 238000001237 Raman spectrum Methods 0.000 claims 1
- 238000005530 etching Methods 0.000 claims 1
- 238000007873 sieving Methods 0.000 claims 1
- 239000010421 standard material Substances 0.000 claims 1
- 230000008878 coupling Effects 0.000 abstract description 5
- 238000010168 coupling process Methods 0.000 abstract description 5
- 238000005859 coupling reaction Methods 0.000 abstract description 5
- 230000004075 alteration Effects 0.000 description 6
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007773 growth pattern Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 229910021532 Calcite Inorganic materials 0.000 description 1
- 229910052656 albite Inorganic materials 0.000 description 1
- 229910052586 apatite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- IKNAJTLCCWPIQD-UHFFFAOYSA-K cerium(3+);lanthanum(3+);neodymium(3+);oxygen(2-);phosphate Chemical compound [O-2].[La+3].[Ce+3].[Nd+3].[O-]P([O-])([O-])=O IKNAJTLCCWPIQD-UHFFFAOYSA-K 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 229910052590 monazite Inorganic materials 0.000 description 1
- VSIIXMUUUJUKCM-UHFFFAOYSA-D pentacalcium;fluoride;triphosphate Chemical compound [F-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O VSIIXMUUUJUKCM-UHFFFAOYSA-D 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- UXBZSSBXGPYSIL-UHFFFAOYSA-N phosphoric acid;yttrium(3+) Chemical compound [Y+3].OP(O)(O)=O UXBZSSBXGPYSIL-UHFFFAOYSA-N 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000000476 thermogenic effect Effects 0.000 description 1
- 229910000164 yttrium(III) phosphate Inorganic materials 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
- G01N33/241—Earth materials for hydrocarbon content
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- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
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- General Health & Medical Sciences (AREA)
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- Investigating Or Analyzing Materials Using Thermal Means (AREA)
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Abstract
This invention presents a method for precisely determining the hydrocarbon accumulation timing in volcaniclastic rocks based on mineral dating and fluid inclusion synergy, includes: Step 1, systematic sampling; Step 2, diagenesis study; Step 3, temperature measurement and compositional analysis of fluid inclusions; Step 4, dating analysis; Step 5, analysis of solid bitumen characteristics; Step 6, determining the timing of hydrocarbon accumulation. In Step 2, sampled volcaniclastic rocks undergo laboratory analysis to assess mineral composition, structure, and tectonic features, identifying diagenesis types. The invention is based on correlating fluid inclusion properties and mineral dating, combined with mineral dating methods, accurately establishes hydrocarbon timing in volcaniclastic rocks, and improving methods for discerning diagenesis and accumulation condition couplings, and offering significant guidance and support for hydrocarbon enrichment research in such rocks.
Description
Method for Precisely Determining the Hydrocarbon Accumulation
Timing in Volcaniclastic Rocks Based on Mineral Dating and Fluid
Inclusion Synergy
The present invention relates to the field of petroleum exploration technology, specifically a method for precisely determining the hydrocarbon accumulation timing in volcaniclastic rocks based on mineral dating and fluid inclusion synergy.
Volcaniclastic rocks are an important component of volcanic sedimentary basins and are one of the main reservoir rocks for volcanic hydrocarbon deposits. They are characterized by a wide distribution over time, diverse mineral types, and complex types and distributions of reservoir spaces. In addition to primary minerals like albite, quartz, and calcite, volcaniclastic rock reservoirs also contain thermogenic accessory minerals such as xenotime, zircon, apatite, and monazite. These rocks are rich in fluid inclusions, often containing various types of hydrocarbon inclusions (gaseous hydrocarbons, liquid hydrocarbons, methane, bitumen, etc.). However, volcaniclastic rocks are significantly affected by later tectonic thermal events and diagenesis.
Traditional analytical methods are unable to accurately determine the phases and timing of gas reservoir formation, leading to unclear gas reservoir formation rules and severely impacting the exploration progress of volcanic gas reservoirs.
Content of the Invention
The objective of this invention is to provide a method for precisely determining the hydrocarbon accumulation timing in volcaniclastic rocks based on mineral dating and fluid inclusion synergy, addressing the issues raised in the aforementioned background.
To achieve this objective, the invention provides the following technical solutions:
a method for precisely determining the hydrocarbon accumulation timing in volcaniclastic rocks based on mineral dating and fluid inclusion synergy, including the following steps: Step 1, systematic sampling; Step 2, studying diagenesis; Step 3, temperature measurement and compositional analysis of fluid inclusions; Step 4, dating analysis; Step 5, analysis of solid bitumen characteristics; Step 6, determining the timing of hydrocarbon accumulation;
In Step 1, systematic sampling is conducted in the development layers of the volcaniclastic rocks;
In Step 2, the study of diagenesis and the sequence of hydrothermal mineral diagenesis is conducted;
In Step 3, temperature measurement and compositional analysis are performed on fluid inclusions in transparent minerals within the fill;
In Step 4, in-situ micro-area U-Pb dating analysis is conducted on carbonate rock minerals and other accessory minerals;
In Step 5, systematic analysis of characteristics such as the reflectance of solid bitumen is carried out;
In Step 6, by combining the tectonic history, burial-thermal evolution history, dating data, fluid inclusion and bitumen characteristics, the hydrocarbon accumulation timing in volcaniclastic rocks is precisely determined.
Preferably, in Step 1, representative sampling points are selected within the development layers of the volcaniclastic rocks, and systematic sampling is performed at specific intervals and depths to ensure that the samples contain a variety of volcaniclastic rock types, and the sampling depth and location information are recorded. The collected samples are then cleaned, dried, screened, and the samples meeting the requirements are numbered and stored.
Preferably, in Step 2, the sampled volcaniclastic rocks undergo laboratory analysis, including mineral composition, structural and tectonic features, to determine the types of diagenesis experienced by the volcaniclastic rocks, including compaction, cementation, and recrystallization.
Preferably, in Step 2, based on the growth patterns, structural features, and chemical composition of minerals in the volcaniclastic rocks, the types of hydrothermal alteration experienced by the clastic rocks, such as hydrothermal alteration, hydrothermal recrystallization, and hydrothermal replacement, are determined.
According to the analysis results, the types of diagenesis and hydrothermal alteration are combined to establish a sequence of hydrothermal mineral phases and diagenesis, and to analyze the symbiotic combinations, evolution, and formation mechanisms of minerals during diagenesis.
Preferably, in Step 3, transparent minerals are extracted from the fill and subjected to cleaning, drying, and preparation of fluid inclusion thin sections. Using a geological heating and cooling stage and fluorescence analysis, the location, shape, size, type, and distribution characteristics of fluid inclusions in the minerals are determined, and their homogenization temperatures and freezing point temperatures are measured. The salinity and pressure conditions are calculated, ultimately inferring the timing and environment of diagenesis and hydrothermal activity.
Preferably, in Step 3, the fluid inclusion thin section samples are placed in a laser
Raman spectrometer, and the characteristic Raman spectral peaks of the inclusions are measured to determine the composition of the inclusions.
Preferably, in Step 4, the LA-MC-ICPMS method is used for in-situ micro-area U-
Pb dating analysis of carbonate rock minerals and other accessory minerals.
Representative samples are selected, cut into thin sections, and fixed on a sample stage using conductive adhesive. Appropriate scanning intervals and times are set, and the laser ablation system is used to perform point-by-point scanning of the samples.
Preferably, in Step 4, the ablated sample gases are transferred to an MC-ICPMS instrument, where different isotopes of elements are separated by ionization, and their concentrations and ratios are measured. The data are subjected to isotope ratio calculations and error correction, and U-Pb ages are obtained based on the analysis results.
Preferably, in Step 5, the solid bitumen samples are crushed, ground, and dried.
Solid bitumen samples are prepared, and the reflectance is calculated using the method of calculating reflectance from organic matter grayscale values. First, a linear regression equation between the reflectance values and grayscale values of standard substances is obtained. Grayscale value data are collected using a polarizing microscope, and the reflectance is calculated from the average grayscale values. At the same time, the type, content, and pyrolysis temperature characteristics of the organic matter are analyzed.
Preferably, in Step 6, the measured data are integrated, combined with the regional tectonic evolution history, burial history, and thermal evolution history, especially the timing and characteristics of volcanic and tectonic movements, to determine the formation background and timing of the volcaniclastic rock hydrocarbon reservoirs. Furthermore, a dynamic coupling model of the evolution and hydrocarbon accumulation process of volcaniclastic rock reservoirs is constructed to further determine the hydrocarbon accumulation timing in volcaniclastic rocks.
Compared to existing technologies, the beneficial effects of this invention are as follows: This invention is based on the analysis of properties and characteristics of mineral components such as fluid inclusions in minerals, combined with mineral dating methods. It can precisely determine the hydrocarbon accumulation timing in volcaniclastic rocks, effectively improving the reliability of methods for discerning the coupling relationship between diagenesis and hydrocarbon accumulation conditions 5 in volcaniclastic rocks. This provides significant methodological guidance and technical support for the study of hydrocarbon enrichment patterns in volcaniclastic rock reservoirs.
FIG.1: flowchart of the method provided by this invention.
Specific Embodiments
The following is a clear and complete description of the technical solutions in the embodiments of this invention, in conjunction with the drawings in these embodiments. Obviously, the described embodiments are just a part of the embodiments of this invention and not all of them. Based on these embodiments of this invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of this invention.
Please refer to FIG.1, an embodiment provided by this invention: A method for precisely determining the hydrocarbon accumulation timing in volcaniclastic rocks based on mineral dating and fluid inclusion synergy, includes the following steps: Step 1, systematic sampling; Step 2, studying diagenesis; Step 3, temperature measurement and compositional analysis of fluid inclusions; Step 4, dating analysis; Step 5, analysis of solid bitumen characteristics; Step 6, determining the timing of hydrocarbon accumulation;
In Step 1, representative sampling points are selected within the development layers of the volcaniclastic rocks for systematic sampling to ensure that the samples contain a variety of volcaniclastic rock types. Sampling depth and location information are recorded, followed by cleaning, drying, and screening of the collected samples.
Samples meeting the requirements are numbered and stored.
In Step 2, the sampled volcaniclastic rocks undergo laboratory analysis, including mineral composition, structural and tectonic features, to determine the types of diagenesis experienced by the volcaniclastic rocks, including compaction, cementation, and recrystallization. Based on the growth patterns, structural features, and chemical composition of minerals in the volcaniclastic rocks, the types of hydrothermal alteration experienced, such as hydrothermal alteration, hydrothermal recrystallization, and hydrothermal replacement, are determined. The diagenesis types and hydrothermal alteration types are combined to establish a sequence of hydrothermal mineral diagenesis, analyzing the symbiotic combinations, evolution, and formation mechanisms of minerals during diagenesis.
In Step 3, temperature measurement and compositional analysis are performed on fluid inclusions in transparent minerals within the fill. Transparent minerals are extracted from the fill and subjected to cleaning, drying, and preparation of fluid inclusion thin sections. Using a geological heating and cooling stage, and fluorescence analysis, the location, shape, size, type, and distribution characteristics of fluid inclusions in the minerals are determined. Their homogenization temperatures and freezing point temperatures are measured, and the salinity and pressure conditions are calculated, ultimately inferring the timing and environment of diagenesis and hydrothermal activity. The fluid inclusion thin section samples are placed in a laser
Raman spectrometer to determine the composition of the inclusions by measuring the characteristic Raman spectral peaks of the inclusions.
In Step 4, in-situ micro-area U-Pb dating analysis is conducted on carbonate rock minerals and other accessory minerals using the LA-MC-ICPMS method.
Representative samples are selected, cut into thin sections, and fixed on a sample stage using conductive adhesive. Appropriate scanning intervals and times are set, and the laser ablation system is used to perform point-by-point scanning of the samples.
The ablated sample gases are transferred to an MC-ICPMS instrument to separate different isotopes of elements by ionization, measuring their concentrations and ratios.
Data are subjected to isotope ratio calculations and error correction to obtain U-Pb ages.
In Step 5, systematic analysis of characteristics such as the reflectance of solid bitumen is conducted. Solid bitumen samples are crushed, ground, and dried. The solid bitumen is made into sample slices, and the reflectance is calculated using the method of calculating reflectance from organic matter grayscale values. First, a linear regression equation between the reflectance values and grayscale values of standard substances is obtained. Grayscale value data are collected using a polarizing microscope, and the reflectance is calculated from the average grayscale values. The type, content, and pyrolysis temperature characteristics of the organic matter are also analyzed.
In Step 6, the measured data are integrated, combined with the regional tectonic evolution history, burial history, and thermal evolution history, especially the timing and characteristics of volcanic and tectonic movements, to determine the formation background and timing of the volcaniclastic rock hydrocarbon reservoirs. Furthermore, a dynamic coupling model of the evolution and hydrocarbon accumulation process of volcaniclastic rock reservoirs is constructed to further determine the hydrocarbon accumulation timing in volcaniclastic rocks.
Based on the above, the advantages of this invention are as follows: This invention analyzes the temperature, environmental pressure, and specific composition of fluid inclusions in minerals, thereby understanding the characteristics and patterns of diagenesis and the sequence of hydrothermal mineral diagenesis. it further determines the diagenesis and the sequence of hydrothermal mineral diagenesis, more effectively identifying high-quality reservoirs and hydrocarbon deposits,
determining the location and depth of potential hydrocarbon reservoirs, and inferring the distribution patterns and characteristics of hydrocarbon reservoirs. By conducting
U-Pb dating on the micro-areas of minerals, high-precision geological age data can be obtained, revealing the formation and evolutionary history of volcaniclastic rocks. By analyzing characteristics such as the reflectance of solid bitumen, the maturation and evolution patterns of solid bitumen can be further confirmed. Integrating and systematically analyzing these data, the hydrocarbon accumulation timing in volcaniclastic rocks can be precisely determined, effectively improving the reliability of methods for discerning the coupling relationship between diagenesis and hydrocarbon accumulation conditions in volcaniclastic rocks, providing significant methodological guidance and technical support for the study of hydrocarbon enrichment patterns in volcaniclastic rock reservoirs.
For those skilled in the art, it is clear that this invention is not limited to the details of the above exemplary embodiments and can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention.
Therefore, in any respect, the embodiments should be considered as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the above description, thus intending to include all changes that fall within the meaning and range of equivalency of the claims within the invention. Any reference numerals in the claims should not be regarded as limiting the involved claims.
Claims (10)
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|---|---|---|---|
| NL2036925A NL2036925B1 (en) | 2024-01-30 | 2024-01-30 | Method for Precisely Determining the Hydrocarbon Accumulation Timing in Volcaniclastic Rocks Based on Mineral Dating and Fluid Inclusion Synergy |
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| NL2036925A NL2036925B1 (en) | 2024-01-30 | 2024-01-30 | Method for Precisely Determining the Hydrocarbon Accumulation Timing in Volcaniclastic Rocks Based on Mineral Dating and Fluid Inclusion Synergy |
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| NL2036925B1 NL2036925B1 (en) | 2024-09-26 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106323924A (en) * | 2016-08-09 | 2017-01-11 | 西安石油大学 | Method for determining oil and gas reservoir-forming age |
| CN108663719A (en) * | 2017-03-31 | 2018-10-16 | 中国石油化工股份有限公司 | The method and system that reservoir historical relics restore |
| CN109425911A (en) * | 2017-08-31 | 2019-03-05 | 中国石油化工股份有限公司 | The method for determining oil gas main accumulation period |
| CN112782206A (en) * | 2019-11-08 | 2021-05-11 | 中国石油天然气股份有限公司 | Method for tracing deep natural gas reservoir forming process |
| CN114034838A (en) * | 2020-10-21 | 2022-02-11 | 核工业北京地质研究院 | Oil-gas dissipation and sandstone-type uranium ore body space positioning method in multi-energy basin |
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- 2024-01-30 NL NL2036925A patent/NL2036925B1/en active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106323924A (en) * | 2016-08-09 | 2017-01-11 | 西安石油大学 | Method for determining oil and gas reservoir-forming age |
| CN108663719A (en) * | 2017-03-31 | 2018-10-16 | 中国石油化工股份有限公司 | The method and system that reservoir historical relics restore |
| CN109425911A (en) * | 2017-08-31 | 2019-03-05 | 中国石油化工股份有限公司 | The method for determining oil gas main accumulation period |
| CN112782206A (en) * | 2019-11-08 | 2021-05-11 | 中国石油天然气股份有限公司 | Method for tracing deep natural gas reservoir forming process |
| CN114034838A (en) * | 2020-10-21 | 2022-02-11 | 核工业北京地质研究院 | Oil-gas dissipation and sandstone-type uranium ore body space positioning method in multi-energy basin |
Non-Patent Citations (3)
| Title |
|---|
| CONG FUYUN ET AL: "In-situ calcite U-Pb ages and absolute timing of oil charge events: A case study of ultra-deep carbonate reservoirs in the Shunbei oilfield, Tarim basin, Northwest China", JOURNAL OF ASIAN EARTH SCIENCES, vol. 259, 29 October 2023 (2023-10-29), AMSTERDAM, NL, pages 105904, XP093186742, ISSN: 1367-9120, DOI: 10.1016/j.jseaes.2023.105904 * |
| FERREIRO MÄHLMANN RAFAEL ET AL: "Vitrinite and vitrinite like solid bitumen reflectance in thermal maturity studies: Correlations from diagenesis to incipient metamorphism in different geodynamic settings", INTERNATIONAL JOURNAL OF COAL GEOLOGY, ELSEVIER, AMSTERDAM, NL, vol. 157, 21 December 2015 (2015-12-21), pages 52 - 73, XP029472829, ISSN: 0166-5162, DOI: 10.1016/J.COAL.2015.12.008 * |
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