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Method for determining diagenesis fluid evolution history

A fluid and history technology, applied in the field of determining the evolution history of diagenetic fluids, can solve the problems of inability to correctly and efficiently identify the characteristics of diagenetic fluids in marine carbonate rocks, and the evolution history of diagenetic fluids

Pending Publication Date: 2022-01-11
PETROCHINA CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0003] This application provides a method for determining the evolution history of diagenetic fluids, which can solve the problem that the characteristics of diagenetic fluids and the evolution history of diagenetic fluids in marine carbonate rocks cannot be correctly and efficiently identified

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  • Method for determining diagenesis fluid evolution history
  • Method for determining diagenesis fluid evolution history
  • Method for determining diagenesis fluid evolution history

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Embodiment Construction

[0040] In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0041] Before explaining the embodiment of the present application in detail, the application scenario of the embodiment of the present application will be described first.

[0042] Carbonate rocks are easily modified by multi-type and multi-stage diagenesis during the diagenesis process. Generally, when carbonate rocks are just diagenetic, the original pores in carbonate rocks will no longer be the main storage spaces and migration channels for fluids, and the pores, holes, and fractures formed during diagenesis Pores, caves and fractures formed during diagenesis are more important to oil and gas reservoirs. For example, after sedimentary carbonate undergoes complicated diagenesis, the original solid part and the fluid-occupied...

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Abstract

The invention discloses a method for determining diagenesis fluid evolution history, and belongs to the field of petroleum and natural gas exploration. The method comprises the following steps: grinding a plurality of rock slices with different types at the same position of a rock sample, and obtaining the diagenesis period of each rock slice in the plurality of rock slices; selecting the multiple rock slices with different diagenesis periods for geochemical analysis to obtain diagenesis fluid information and fluid sources of the multiple rock slices; obtaining the uniform temperature of the fluid inclusion captured in the multiple rock slices with different diagenesis periods, and determining the diagenesis fluid activity time of the multiple rock slices based on the uniform temperature; and determining the diagenetic fluid evolution history embodied by the rock sample based on the diagenetic period, the diagenetic fluid information, the fluid source and the diagenetic fluid activity time. Therefore, the diagenetic fluid characteristics and diagenetic fluid evolution history of the marine carbonate rock can be simply, conveniently and accurately constructed.

Description

technical field [0001] The present application relates to the field of oil and gas exploration, in particular to a method for determining the evolution history of diagenetic fluids. Background technique [0002] Marine carbonate rocks contain more than 50% of the world's oil and gas resources, and are important targets for oil and gas exploration at home and abroad. Among them, the main component of marine carbonate rocks is CaCO 3 (calcite) and MgCa[CO 3 ] 2 (dolomite). Because carbonate rocks are chemical sedimentary rocks, they are susceptible to multi-stage dissolution of fluids in geological history, which will form a large number of pores, holes, and cracks in the rocks, and will also precipitate in the holes, holes, and cracks Multi-stage diagenetic minerals. Correctly judging the formation stages of multi-stage diagenetic minerals can correctly and efficiently identify the characteristics of diagenetic fluids and the evolution history of diagenetic fluids in mar...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/84G01N23/2254G01N27/62G01N21/64G01N25/00G01N33/24G01N23/2206
CPCG01N21/84G01N23/2254G01N27/628G01N21/6458G01N25/00G01N33/24G01N23/2206G01N2223/071G01N2223/08G01N2223/102G01N2223/616
Inventor 罗冰陈聪张玺华汪华袁海锋张亚梁大庆陈双玲谢忱高兆龙朱联强杨雨然张晓丽林怡任纪博
Owner PETROCHINA CO LTD
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