Method and device for determining formation resistivity and polarizability
A technology of formation resistivity and polarizability, applied in the field of oil and gas exploration, can solve problems such as poor accuracy and slow processing speed, and achieve the effect of taking into account processing efficiency
Active Publication Date: 2020-01-07
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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[0089] 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 scope of protection of this application.
[0090] Considering that the existing determination method of formation resistivity and polarizability is usually to use the method of optimizing the objective function to determine an optimal solution as formation resistivity and polarizability by solving linear equations step by step and iteratively. However, limited by the implementatio...
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The embodiment of the present application provides a method and device for determining stratum resistivity and polarizability, wherein the method includes: acquiring time-frequency electromagnetic observation data and geological background data of a target region; determining a first parameter solution and a search trajectory parameter according to the geological background data; determining a second parameter solution according to the first parameter solution and the search trajectory parameter; modifying the search trajectory parameter according to the first parameter solution, the second parameter solution, and the time-frequency electromagnetic observation data, and determining the stratum resistivity and polarizability of the target region according to the modified search trajectory parameter. The method modifies the search trajectory parameter according to the second parameter solution determined based on the first parameter solution and the search trajectory parameter by using the mechanism of a stochastic differential algorithm, and then searches and determines the stratum resistivity and polarizability of the target region according to the modified search trajectory parameter, thereby solving the low processing speed and the poor accuracy in the existing method.
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 process 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 out the possible storage of oil and gas from the area. area. For example, the difference in polarization characteristics between areas where oil and gas are usually stored and surrounding rocks is significantly smaller than that between areas where metal deposits are stored and surrounding rocks. [0003] At present, in order to determine the formation resistivity and polarizability of the target area, the method of optimizing the objective function is often used to optimiz...
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IPC IPC(8): G01V3/38
CPCG01V3/38
Inventor 王志刚刘雪军张林
Owner BC P INC CHINA NAT PETROLEUM CORP