Method and apparatus for determining sealing property of fault

Abstract

The embodiment of the application provides a method and apparatus for determining a sealing property of a fault. The method comprises: determining an inversion lithological data volume according to post-stack seismic data and logging data in a target fault research area; according to post-stack seismic data, determining spatial fracture surface distribution of the target fault; carrying out spatial fracture surface distribution meshing and thus determining inclination angles of all mesh points; on the basis of the loaded inversion lithological data volume as well as the inclination angles of all mesh points, determining overburden pressures of all mesh points of the target fault fracture surface; and determining whether the sealing properties of all mesh points reach a preset requirement in the spatial fracture surface of the target fault based on the overburden pressures of all mesh points. Because the influence on the sealing property by the stress is taken into consideration and the sealing property of the target fault is determined based on seismic data, technical problems that only a two-dimensional analysis is carried out and the accuracy is low according to the existing fault dealing property determination method can be solved; and thus a technical effect of determining the three-dimensional sealing property of the target fault with high precision can be realized.

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 fault sealing performance. Background technique [0002] In the process of specific oil and gas exploration, it is often necessary to determine the fault sealing property of the area to be tested. Among them, the fault sealing analysis and evaluation technology is often related to whether the oil and gas charging degree of the trap controlled by the fault can be accurately judged. As for fault-block traps, it is very important to accurately judge and predict the degree of oil and gas charging in fault-block traps to improve the benefits of oil and gas exploration. Specifically, for example, in the process of oil and gas exploration, the plugging performance of generally oil layers is relatively good. Furthermore, during construction, the target layer or area with relatively good sealing performance can be selected fo...

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Problems solved by technology

[0005] The embodiment of the present application provides a method and device for determining the sealing capacity of a fault to solve the technical problems existing in the existing determination method of sealing capacity that only two-dimensional analysis can be performed and the accuracy of determining the sealing capacity is not high

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