A Research Method for Salinity Evolution History of Formation Paleofluids
A technology of paleo-fluid and evolution history, applied in the research field of formation paleo-fluid salinity evolution history, can solve problems such as cumbersome operation, difficulty in establishing paleo-fluid salinity evolution history, and investing more time and energy, and achieve simple operation Effect
Active Publication Date: 2020-06-30
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology
This research method is difficult to establish a continuous paleo-fluid salinity evolution history, and it is necessary to obtain the formation time of each inclusion separately in combination with the burial history, which is cumbersome to operate and requires a lot of time and energy to realize.
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Embodiment Construction
[0034] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0035] Taking the depiction of the salinity evolution history of paleofluids in the Ma55 submember of the Majiagou Formation in the Jingxi area of the Ordos Basin as an example, figure 1 It is a flow chart of a research method for formation paleo-fluid salinity evolution history according to an embodiment of the present invention. The method contains the following steps:
[0036] S1. The screening of formation rock cement samples specifically includes the following steps:
[0037] S11, comprising the following steps:
[0038] S111. For the core samples of the Mawu 5th member of the Majiagou Formation in the Jingxi area, make casting thin sections and inclusion thin sections;
[0039] S112. Using a microscope to observe the development characteristics of the cement in the rock pores and the fluid inclusions in the cement;
[0040] S113. Record the s...
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The present invention provides a method for researching the evolution history of salinity of formation paleofluids, comprising the following steps: S1, judging the sequence of formation rock cements, and screening samples that develop multi-stage cements and are rich in fluid inclusions; S2, select fluids of different sequences Inclusions, conduct uniform temperature and salinity tests, and obtain multiple uniform temperature and salinity data; S3, combined with burial history, determine the corresponding relationship between geothermal evolution and geological time, according to the obtained uniform temperature and salinity of multiple fluid inclusions The salinity data can be used to draw the trend line of salinity change with geological time, so as to obtain the evolution history of paleo-fluid salinity. An easy-to-operate research method capable of establishing a continuous history of paleo-fluid salinity evolution was established, and a relationship chart with temperature and geological time as the double abscissa and salinity as the ordinate was proposed to describe the salinity of paleo-fluids evolutionary history.
Description
technical field [0001] The invention relates to the field of oil and gas geological exploration, in particular to a research method for the evolution history of formation ancient fluid salinity. Background technique [0002] In petroleum basins, formation paleofluids often control tectonic activities and reservoir diagenesis, and play an important role in the formation and evolution of reservoirs and the process of hydrocarbon accumulation. At present, the research on the characteristics of formation paleofluids mainly adopts analysis methods such as inclusions, elements, and isotopes. Among them, the uniform temperature and salinity characteristics of inclusions are the key points in the study of paleofluids. is of great significance. In terms of the characterization of the salinity evolution history of paleofluids, previous studies have firstly measured the temperature and salt of multiple inclusions, and then analyzed the formation geological time of each inclusion accor...
Claims
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IPC IPC(8): G01N21/84
CPCG01N21/84
Inventor 刘景东蒋有录刘华
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)