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Method for determining abnormal high pressure waves and range of basin by utilizing sterane isomerization parameters

A technology with abnormal high pressure and parameter determination, which is applied in earthwork drilling and production, wellbore/well components, etc. It can solve the problems that sampling and testing are easily limited by actual conditions, and the inclusion method has many solutions.

Active Publication Date: 2016-06-08
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

The main methods of paleopressure research include numerical simulation, inclusion method, etc. Of course, these methods also have certain limitations: the numerical simulation method is limited by many geological conditions, and requires the verification of geological data; the inclusion method has multiple solutions. Large, sampling and testing are also easily limited by actual conditions

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  • Method for determining abnormal high pressure waves and range of basin by utilizing sterane isomerization parameters
  • Method for determining abnormal high pressure waves and range of basin by utilizing sterane isomerization parameters
  • Method for determining abnormal high pressure waves and range of basin by utilizing sterane isomerization parameters

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Embodiment Construction

[0018] In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments are listed below and described in detail in conjunction with the accompanying drawings.

[0019] Such as figure 1 as shown, figure 1 It is a flow chart of the method for determining the range of abnormal high pressure in the basin by using the sterane isomerization parameters of the present invention.

[0020] In step 101, effective source rocks are determined in units of sags or sags. Typical biomarkers were selected for each set of source rocks in the sag, combined with the biomarker characteristics of hydrocarbons in each reservoir, and compared with the two to determine the source rocks of hydrocarbons in each reservoir. In one embodiment, for a continental faulted basin, the main biomarkers used are gammacerane, Pr / Ph, 4-methylsterane, dinosterane, etc. to determine effective source rocks. The process goes to step 102.

[002...

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Abstract

The invention provides a method for determining abnormal high pressure waves and range of a basin by utilizing sterane isomerization parameters. The method comprises the following steps: determining the change rule, evolving with the sterane isomerization parameters, in hydrocarbon source rocks, and drawing a sterane isomerization parameter evolving curve of the hydrocarbon source rocks; establishing variation tendency with depth of the sterane isomerization parameters of a monophyletic oil deposit; determining the variation tendency of the sterane isomerization parameters in a transportation process from the hydrocarbon source rocks to the oil deposit; determining hydrocarbon expulsion threshold of the hydrocarbon source rocks, calibrating and dividing a sterane isomerization parameter boundary line between abnormal high pressure and a buoyancy effect interval; carrying pressure characteristic analysis on continuous reservoir and hydrocarbon accumulation in a single well; and according to the sterane isomerization parameter boundary line, separately dividing waves and range of power on a profile and a plane. The method for determining abnormal high pressure waves and range of the basin by utilizing sterane isomerization parameters realizes quantitative characterization of power conditions of an oil-gas hydrocarbon accumulation period, defines the pressure structure, in the hydrocarbon accumulation period, of the basin, and provides technical support for quantitative research on oil-gas hydrocarbon accumulation.

Description

technical field [0001] The invention relates to the technical field of oilfield development, in particular to a method for determining the sweeping range of abnormally high pressure in a basin by using sterane isomerization parameters. Background technique [0002] The process of oil and gas migration and accumulation is the core of oil and gas geology research, and it is also one of the key issues restricting current oil and gas exploration. The dynamic analysis of the accumulation process is the most important link. Due to the lack of effective quantitative characterization methods, the It has also become a hot spot and bottleneck of research at home and abroad. The main methods of paleopressure research include numerical simulation, inclusion method, etc. Of course, these methods also have certain limitations: the numerical simulation method is limited by many geological conditions, and requires the verification of geological data; the inclusion method has multiple soluti...

Claims

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Application Information

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IPC IPC(8): E21B49/00
Inventor 张守春王学军徐兴友王秀红刘军宋长玉刘华夏包友书王宇蓉李钜源刘庆张蕾吴连波
Owner CHINA PETROLEUM & CHEM CORP
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