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Method and system for simulating and analyzing shale reservoir diagenetic evolution process

An evolutionary process, mud shale technology, applied in the field of geological exploration, can solve the problem that experimental research work is rarely carried out

Active Publication Date: 2014-03-12
PETROCHINA CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

The above examples show that most of the diagenetic simulation experiments carried out at home and abroad are acid dissolution experiments of sandstone and hydrocarbon generation simulation experiments of mud shale. There are few experimental studies on the division of stratodiagenetic stages, the content changes of brittle minerals, and the formation temperature and pressure of authigenic minerals.

Method used

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  • Method and system for simulating and analyzing shale reservoir diagenetic evolution process

Examples

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Embodiment 1

[0047] Such as figure 1 As shown, it is a flowchart of a simulation and analysis method for the diagenetic evolution process of a mud shale reservoir in this embodiment, including the following steps:

[0048] Step 101, obtaining actual geological parameters, said actual geological parameters include: geothermal gradient and pressure, formation burial mode and reservoir diagenetic fluid characteristics, clay mineral types and contents in mud, rock mineral components and contents, and sandstone reservoir rocks crumb components;

[0049] Wherein, the type and content of clay minerals in the mud, rock mineral components and content are determined according to the total amount of clay minerals in sedimentary rocks and the X-ray diffraction quantitative analysis method of common non-clay minerals.

[0050] Step 102, preparing a mud sample according to the type and content of clay minerals in the mud, rock mineral components and content;

[0051] Step 103, preparing a sandy sample...

Embodiment 2

[0070] Such as figure 2 As shown, it is a structural diagram of a simulation and analysis system of a shale reservoir diagenetic evolution process of the present invention, including:

[0071] The actual geological parameter survey unit 201 is used to obtain actual geological parameters, which include: geothermal gradient and pressure, stratum burial mode and reservoir diagenetic fluid characteristics, types and contents of clay minerals in mud, rock mineral components and content and composition of sandstone reservoir rock clastics;

[0072] A mud sample preparation unit 202, configured to prepare a mud sample according to the type and content of clay minerals in the mud, rock mineral components and content;

[0073] It is also used to determine the type and content of clay minerals, rock mineral components and content in the mud sample according to the total amount of clay minerals in sedimentary rocks and the quantitative analysis method of X-ray diffraction of common non...

Embodiment 3

[0092] Such as image 3 As shown, it is a schematic flow chart of an analysis method for simulating mudstone diagenesis stages and authigenic mineral evolution under the constraints of geological processes in this embodiment, including the following steps:

[0093] Step 301, analysis of geological process elements;

[0094] Analysis of elements of the actual geological process, including geothermal gradient and pressure in the study area, formation burial methods, and characteristics of reservoir diagenetic fluids, etc. (diagenetic fluids are generally divided into two types: weakly alkaline fluids and weakly acidic fluids. The composition of the reservoir fluid can be obtained by various means, and it can be determined as weakly alkaline fluid or weakly acidic fluid according to the composition; the burial methods include long-term shallow burial-later rapid deep burial, long-term shallow burial-later rapid deep burial-uplift and normal burial Compaction and other methods, t...

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Abstract

The invention provides a method and system for simulating and analyzing a shale reservoir diagenetic evolution process. A diagenesis simulation system is utilized to carry out simulation and analyzing of shale evolution, and under simulation of compaction approaching to actual geological conditions, shale reservoir diagenetic evolution stage division, brittle mineral content variation and the forming temperature and pressure of authigenic mineral are determined.

Description

technical field [0001] The invention relates to the field of geological exploration, in particular to a method and system for simulating and analyzing the diagenetic evolution process of mud shale reservoirs. Background technique [0002] At present, there are few units at home and abroad that have devices for diagenetic simulation. Generally, they are only small devices assembled according to certain experimental requirements, and most of them are acid-dissolution experiments of sandstone. For example, in the simulation experiments of Chengdu University of Technology and Changqing Oilfield, five minerals (anorthite, ordinary pyroxene, diopside, actinolite and amphibole) were selected for acetic acid dissolution experiments under four different temperature and pressure conditions. . The results show that the dissolution process of feldspar-type aluminosilicate minerals is slow, and the amount of ion migration is very small. The dissolved amount of aluminosilicate mineral io...

Claims

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Application Information

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IPC IPC(8): E21B49/00G01D21/02
Inventor 高志勇崔京钢朱如凯罗忠冯佳睿
Owner PETROCHINA CO LTD
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