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Methdo for determining clastic rock basin fluid activity age

A clastic rock and basin technology, applied in the field of oil and gas exploration, can solve the problems of inability to develop authigenic illite, small particle size of authigenic illite, long test period, etc., and achieve the effects of short test period, low test cost and good application prospect.

Inactive Publication Date: 2021-03-16
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Regarding the choice of dating methods for authigenic illite, there are 40 Ar- 39 Two methods of Ar and Rb-Sr dating are available, 40 Ar- 39 Ar dating requires nuclear irradiation before testing, so this dating method has a long test cycle and high test costs, and the particle size of authigenic illite is small (usually less than 0.5 microns). 40 Ar- 39 There will be serious nuclear recoil during Ar dating, although the use of vacuum packaging technology can effectively avoid nuclear recoil, but the vacuum tube has a greater risk in the nuclear irradiation process
Constrained by these factors, China's current 40 Ar- 39 The Ar geochronology laboratory is not yet able to develop authigenic illite 40 Ar- 39 Ar dating

Method used

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  • Methdo for determining clastic rock basin fluid activity age
  • Methdo for determining clastic rock basin fluid activity age
  • Methdo for determining clastic rock basin fluid activity age

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Embodiment 1

[0031] Please refer to figure 1 Embodiment 1 of the present invention provides a method of determining a fluid activity agenta of a debris basin, including the following steps:

[0032] Step S1, the sample collection: Select the South China Sea North Bay Basin as the research area, and the drilling sandstone samples of the Rhagle Port of the Seabass Group in the west of the study area are research objects. The sandstone sample is mainly distributed in large-scale deposits - US Taiwan breaks, Crude sandstone is the main research object.

[0033] Step S2, Rock Frame Analysis: A rock flakes were prepared using the collected sandstone sample, and the rock flakes were subjected to a microscope sample from the raw sandstone sample of Yili, and the rock flake analysis showed the enrichment of Ili, which developed in quartz. In the long stone pores, there is a form of a mesh or zero-star shape, and the interference color is a grade yellow, and it is preliminarily determined that it is se...

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Abstract

The invention belongs to the technical field of oil and gas exploration, and particularly provides a method for determining a clastic rock basin fluid activity age. The method mainly comprises the steps of sample collection, rock slice analysis, scanning electron microscope analysis, authigenic illite separation and maximum particle size determination, separation of authigenic illite minerals withdifferent particle sizes, sample dissolution and chemical separation, Rb and Sr isotope composition test, basin fluid activity age determination and the like. The method provided by the invention hasthe advantages of wide application range, easily available samples, short test period, low test cost and the like, and can simultaneously determine the multi-stage fluid activity age experienced by the basin.

Description

Technical field [0001] The present invention relates to the field of oil and gas exploration, in particular, to a method of determining a fluid activity of a debris basin. Background technique [0002] Basin fluid refers to all fluids occupying or passing the rock pores in the basin, and the effect of substance migration and energy transmission during basin evolution. The fluid is the most active geological effort in the oil-containing basin, participating in almost all geological processes in the deposited basin, and is closely related to the generation, migration, and completion of oil in the deposited basin. Fluid activity leads to hydrocarbon source rocks to hydrocarbons, affecting the rocking process and changing reservoir, carrying oil and gas migration in a suitable site to form an oil and gas. Therefore, the basin fluid study is one of the most important contents of the oil-containing basin analysis. In terms of fluid activity in Basin, researchers have completed a large ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/207G01N27/62G01N1/28
CPCG01N1/2813G01N23/207G01N27/62
Inventor 刘恩涛王华严德天张子傲
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)