Method and device for determining formation resistivity and polarizability
A technology of formation resistivity and polarizability, which is applied in the field of oil and gas exploration, can solve the problems of poor accuracy and slow processing speed, and achieves the problem of taking into account processing efficiency, solving slow processing speed, and accurately determining formation resistivity and polarizability. Effect
Active Publication Date: 2020-02-14
BC P INC CHINA NAT PETROLEUM CORP +1
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[0005] The embodiment of the present application provides a method and device for determining formation resistivity and polarizability to solve the technical problems of slow processing speed and poor accuracy existing in existing methods, and to achieve both processing efficiency and accurate determination of the target area Technical Effects of Formation Resistivity and Polarizability
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[0057] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.
[0058] Considering the existing determination methods of formation resistivity and polarizability, it is often to use the method of optimizing the objective function to determine an optimal solution as the formation resistivity and polarizability by solving linear equations step by step and iteratively. However, limited by the implementation...
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An embodiment of the invention provides a formation resistivity and polarizability determination method and device. The method comprises the following steps: obtaining time-frequency electromagnetic observation data and geologic background data of a target area; according to the geologic background data, generating a first sample data set by utilizing a uniform distribution random function; and according to the time-frequency electromagnetic observation data, carrying out clustering analysis on the first sample data set to determine formation resistivity and polarizability of the target area.The scheme is characterized by generating random sample data to establish the first sample data set by utilizing the uniform distribution random function, and determining the formation resistivity andpolarizability of the target area meeting requirements in the first sample data set through clustering analysis, thereby solving the technical problems of slow processing speed and poor accuracy in the existing methods, and achieving a technical effect of considering processing efficiency and accurately determining the formation resistivity and polarizability of the target area.
Description
technical field [0001] The present application relates to the technical field of oil and gas exploration, in particular to a method and device for determining formation resistivity and polarizability. Background technique [0002] In the field of oil and gas exploration, it is often necessary to determine the formation resistivity and polarizability of the target area first, and then according to the differences in the formation resistivity and polarizability of different areas in the target area, find possible oil and gas storage in the target area. Area. For example, usually the difference in polarization characteristics between areas where oil and gas are stored and surrounding rocks is significantly smaller than that between areas where metal deposits are stored and surrounding rocks, so oil and gas areas can be found based on the above differences. [0003] At present, in order to determine the formation resistivity and polarizability of the target area, most of the co...
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IPC IPC(8): G01V3/38
CPCG01V3/38
Inventor 王志刚陶德强张林何展翔
Owner BC P INC CHINA NAT PETROLEUM CORP