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Ancient fluid comprehensive analysis method related to oil and gas accumulation

A technology for comprehensive analysis and oil and gas accumulation, applied in the field of oil and gas exploration and research, it can solve the problems of lack of chronological information, single tracer method, strong subjectivity of interpretation, etc., and achieves short test period, simple preprocessing, and high spatial resolution. Effect

Inactive Publication Date: 2021-03-12
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

[0006] In view of this, the present invention provides a comprehensive analysis method for paleofluids related to oil and gas accumulation. The method takes hydrocarbon-bearing calcite related to oil and gas accumulation as the research object, and can not only determine the activity age of hydrocarbon-bearing fluids and hydrocarbon-containing components , and the temperature and source of hydrocarbon-containing fluids can be ascertained, which can effectively solve the problems of lack of age information, single tracer method, and strong subjectivity of interpretation in the prior art

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  • Ancient fluid comprehensive analysis method related to oil and gas accumulation
  • Ancient fluid comprehensive analysis method related to oil and gas accumulation
  • Ancient fluid comprehensive analysis method related to oil and gas accumulation

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Embodiment 1

[0036] refer to figure 1 , Embodiment 1 of the present invention provides a method for comprehensive analysis of ancient fluids related to oil and gas accumulation, comprising the following steps:

[0037] Step S1, collection and screening of calcite samples: one piece of calcite vein sample was collected from the Gucheng area of ​​the Tarim Basin. Calcite was produced in the form of veins in carbonate reservoirs and was a product of later fluid activities.

[0038] Step S2, cathodoluminescence analysis: Polish the collected calcite vein sample to a thickness of 0.05mm on both sides, make a thin slice of the calcite vein sample, use a Leica DM4500P polarizing microscope for mineralogy observation, and observe the calcite vein sample through the cathodoluminescence analysis of the calcite vein sample The veins are red to dark red under a polarizing microscope, indicating that they are the products of single-stage paleofluid filling; the cathodoluminescence images of calcite vei...

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Abstract

The invention belongs to the field of oil and gas exploration and research, and particularly provides an ancient fluid comprehensive analysis method related to oil and gas accumulation. The method comprises the main steps of calcite sample collection and screening, cathodoluminescence analysis, hydrocarbon-containing fluid inclusion identification, fluid inclusion uniform temperature measurement,fluid inclusion laser Raman analysis, laser in-situ calcite vein U-Pb dating, calcite and surrounding rock C-O isotope analysis, calcite and surrounding rock Sr isotope analysis and the like. According to the method, the hydrocarbon-containing calcite related to oil and gas accumulation serves as a research object, the activity age and hydrocarbon-containing components of the hydrocarbon-containing fluid can be determined, the temperature and source of the hydrocarbon-containing fluid can be found out, and the problems that in the prior art, age information is lost, a tracing method is single,and interpretation subjectivity is high can be effectively solved.

Description

technical field [0001] The invention relates to the field of oil and gas exploration research, in particular to a comprehensive analysis method for ancient fluids related to oil and gas accumulation. Background technique [0002] Basin fluid is the most active geological force in petroleum basins, participating in almost all geological processes in sedimentary basins, such as oil and gas accumulation, diagenesis, reservoir reformation, etc. Fluid activity causes source rocks to mature and generate hydrocarbons, which changes reservoir properties and carries oil and gas to migrate to suitable locations for accumulation. Therefore, conducting comprehensive research on paleofluids in petroleum-bearing basins, determining the source and temperature of basins, and finding out the age of fluid activity in basins are crucial to revealing the diagenesis and accumulation processes of basins and the law of oil and gas enrichment. [0003] Basin fluids can be divided into two categori...

Claims

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Application Information

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IPC IPC(8): G01N21/65G01N27/62
CPCG01N21/65G01N27/62
Inventor 刘恩涛赵建新陈思谷志宇
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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