Method for discriminating dolomite with ordered structure

A technology with orderly structure and discriminant method, which is applied in the direction of material analysis, instrumentation, suspension and porous material analysis using radiation diffraction, and can solve problems such as poor test accuracy, misjudgment of dolomite reservoirs, and interference of test results , to achieve the effect of a simple discriminant method

Active Publication Date: 2020-06-19
PETROCHINA CO LTD
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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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  • Method for discriminating dolomite with ordered structure
  • Method for discriminating dolomite with ordered structure
  • Method for discriminating dolomite with ordered structure

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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 solution of the present invention will be described in detail below in conjunction with the following specific examples, but it should not be construed as limiting the scope of the present invention.

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

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

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

[0029] (3) crushing the cylindrical rock samples whose porosity has been measured in step (2) successively, and then carrying out the whole rock mineral content test to the crushed rock sample...

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Abstract

The invention provides a method for judging dolomite with an ordered structure, which comprises the following steps of: (1) drilling more than two cylindrical rock samples from a rock core to be detected, numbering in sequence, cleaning and drying to constant weight; (2) measuring the porosity value of each cylindrical rock sample; (3) sequentially crushing the cylindrical rock samples of which the porosity is measured in the step (2), and testing the total rock mineral content of the crushed rock samples so as to obtain dolomite content data of each rock sample; (4) with the dolomite contentas an abscissa and the porosity value as an ordinate, carrying out correlation relationship plumbing to generate a feature plate; and (5) identifying the dolomite with theordered structure according to the feature plate. According to the discrimination method of the structured ordered dolomite provided by the invention, the structured ordered dolomite can be identified according to the feature plate, the method is simple and quick, and a basis can be provided for searching a high-quality dolomite reservoir stratum and analyzing a deposition environment.

Description

technical field [0001] The invention relates to a method for discriminating structurally ordered dolomite, in particular to a method for identifying dolomite with complete structural order capable of forming high-quality reservoirs, and belongs to the technical field of lacustrine mixed rock reservoir evaluation. Background technique [0002] From a global perspective, the oil and gas reservoirs with large reserves and high production are mostly 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 geological reserves have exceeded 6 Yitun (Yuan Jianying et al., Carbon and oxygen isotope characteristics of dolomite in saline lake basin and its paleoenvironmental significance—a case study of the Eocene Lower Ganchaigou Formation in Western Qaidam Basin, Geochemistry, v44, n3, p.254-266, 2015 ). The three major carbonate reservoirs are all related to dolomitization, and dolomitization is o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24G01N15/08G01N23/20
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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