A method for quantitatively analyzing the coupling mechanism of ultra-deep gypsum-salt rock and dolomite

A quantitative analysis technology of gypsum-salt rock, applied in measuring devices, geophysical measurement, soil material testing, etc., can solve problems such as research, difficult analysis, strong heterogeneity of gypsum-salt rock and dolomite, and achieve complete analysis , rigorous logic, and the effect of improving the efficiency of identification work

Active Publication Date: 2021-06-08
CHENGDU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

However, the existing technical means have not conducted in-depth research on the close relationship between gypsum-salt rock and dolomite reservoirs, and due to the strong heterogeneity of gypsum-salt rock and dolomite, it is difficult to carry out accurate quantitative analysis

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Embodiment Construction

[0021] The present invention provides a method for quantitatively analyzing the coupling mechanism of ultra-deep gypsum-salt rock and dolomite, which takes the carbonate reservoir in the Sichuan Basin as an object to quantitatively analyze the coupling mechanism of ultra-deep gypsum-salt rock and dolomite, the reason The reason is that in the deep-ultra-deep carbonate formations in the Sichuan Basin, it is found that dolomite is developed and associated with evaporites such as gypsum salts, and gypsum salts exist above or below it. This phenomenon indicates that there is a certain coupling relationship between the development of dolomite and gypsum-salt deposition. In-depth analysis of the properties of dolomite diagenetic fluid in the gypsum-salt layer series can determine the temporal and spatial coupling relationship between gypsum-salt depositional fluid and dolomite diagenetic fluid, which can be the mechanism of dolomitization. Research lays the groundwork.

[0022] Rese...

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Abstract

The invention discloses a method for quantitatively analyzing the coupling mechanism of ultra-deep gypsum-salt rock and dolomite, including: (1) Taking the carbonate reservoir in the Sichuan Basin as the object, obtaining geological background data and classical field geological outcrop profile measurement respectively (2) According to the data obtained in step (1), use sedimentology, petroleum geology theory and various geochemical test analysis to clarify the basic geological characteristics of dolomite and determine the (3) According to the petrology and distribution laws of various types of dolomite, analyze the morphology and formation mechanism of various types of dolomite and the quantitative relationship with gypsum-salt rock, and finally Determine the coupling relationship. The present invention clarifies the source of dolomitization fluid in strata and quantifies the coupling relationship with gypsum-salt rock by judging the source of dolomitization fluid, seepage direction, path, etc., which has important guiding significance for oil and gas exploration.

Description

technical field [0001] The invention relates to a method for quantitatively analyzing the coupling mechanism of ultra-deep gypsum-salt rock and dolomite. Background technique [0002] In carbonate formations, high-quality oil and gas reservoirs often undergo dolomitization, and most oil and gas are rich in carbonate dolomite reservoirs. In the deep-ultra-deep carbonate formations in the Sichuan Basin, it was found that dolomite is developed and associated with evaporites such as gypsum salt, and gypsum salt exists above or below it. This phenomenon indicates that the development of dolomite is associated with the deposition of gypsum salt some sort of coupling. [0003] At present, most of the traditional technical means are to analyze the sealing conditions of gypsum-salt rock formations as oil and gas reservoirs. At the same time, the TSR reaction of gypsum-salt rock formations themselves will generate hydrogen sulfide, thereby improving the reservoir physical properties ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24
CPCG01N33/24G01V99/005G01V11/00
Inventor 文华国霍飞徐文礼罗涛魏研李璐萍
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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