A Discrimination Method for Structurally Ordered Dolomite

A technology with orderly structure and method of discrimination, applied in material analysis using radiation diffraction, instrumentation, material analysis using wave/particle radiation, etc. and other problems, to achieve the effect of simple discrimination method

Active Publication Date: 2022-08-02
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

During the test of order degree, the test result is easily disturbed by the trace amount of iron ions contained in it, resulting in poor test accuracy
Therefore, it is easy to misjudge effective dolomite reservoirs as structurally disordered non-reservoirs by using test results.

Method used

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  • A Discrimination Method for Structurally Ordered Dolomite
  • A Discrimination Method for Structurally Ordered Dolomite
  • A Discrimination Method for Structurally Ordered Dolomite

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Embodiment Construction

[0025] In order to have a clearer understanding of the technical features, purposes and beneficial effects of the present invention, the technical solutions of the present invention are now described in detail below with reference to the following specific examples, but should not be construed as limiting the scope of implementation of the present invention.

[0026] In order to solve the above problems, the embodiment of the present invention provides a method for discriminating structurally ordered dolomite, wherein the method includes the following steps:

[0027] (1) Drill two or more cylindrical rock samples from the core to be tested, number them in sequence, clean them and dry them to constant weight;

[0028] (2) Measure the porosity value of each cylindrical rock sample by the helium method;

[0029] (3) pulverizing the cylindrical rock samples whose porosity has been measured in step (2) in turn, and then carrying out the whole rock mineral content test on the pulver...

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Abstract

The present invention provides a method for discriminating structurally ordered dolomite, wherein the method comprises the following steps: (1) Drilling two or more cylindrical rock samples from the core to be tested, numbering them in sequence, cleaning and drying to constant weight; (2) measuring the porosity value of each cylindrical rock sample; (3) crushing the cylindrical rock samples whose porosity has been measured in step (2) in turn, and then crushing the crushed rock samples. (4) Take the dolomite content as the abscissa and the porosity value as the ordinate, and select the relevant relationship points to generate the characteristic map; (4) 5) Identifying dolomite with an ordered structure according to the feature plate. The method for discriminating the structurally ordered dolomite provided by the invention can identify the structurally ordered dolomite according to the characteristic plate, and the method is simple and fast, and can provide a basis for searching for high-quality dolomite reservoirs and analyzing the depositional environment.

Description

technical field [0001] The invention relates to a method for discriminating structurally ordered dolomite, in particular to a method for identifying a complete structurally ordered dolomite capable of forming high-quality reservoirs, and belongs to the technical field of reservoir evaluation of lacustrine diaciate. Background technique [0002] From a global perspective, most of the oil and gas reservoirs with large reserves and high production are carbonate oil and gas reservoirs. More than 63 lacustrine carbonate oil and gas fields have been proven in my country, and the total proven oil in place has exceeded 6 100 million tons (Yuan Jianying et al., Carbon and oxygen isotopic characteristics and paleoenvironmental significance of dolomite in salinized lake basins—taking the Eocene Lower Ganchaigou Formation in the western Qaidam Basin as an example, Geochemistry, v44, n3, p.254-266, 2015 ). The three major carbonate reservoirs are all related to dolomitization, and dolomit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24G01N15/08G01N23/2005
CPCG01N33/24G01N15/088G01N23/20
Inventor 黄成刚李红哲杨巍吴梁宇常海燕
Owner PETROCHINA CO LTD
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