Method and device for determining fault sealing property
A sealing and fault technology, applied in the field of oil and gas exploration, can solve the problems of low accuracy and achieve high certainty and high precision results
Active Publication Date: 2019-05-07
PETROCHINA CO LTD
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[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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[0058] In order to enable those skilled in the art to better understand the technical solutions in the application, the following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Obviously, the described The embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work should fall within the protection scope of this application.
[0059] Taking into account the existing pluggability determination methods, because the drilling data is usually used, and the drilling data is usually two-dimensional, the existing pluggability determination methods often can only be simple two-dimensional Data calculation and analysis cannot well meet the technical problems of exploration requirements. ...
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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 application relates to the field of oil and gas exploration technology, and in particular to a method and device for determining the plugging properties of faults. Background technique [0002] In the process of specific oil and gas exploration, it is often necessary to determine the fault sealability of the area to be tested. Among them, the analysis and evaluation technology of fault sealability is often related to the ability to accurately determine the hydrocarbon filling degree of the trap under the control of the fault. For fault block traps, the ability to accurately predict and predict the oil and gas charging degree of fault block traps is very important for improving the benefits of oil and gas exploration. Specifically, for example, in the process of oil and gas exploration, the sealing performance of general oil layers is relatively good. Furthermore, during construction, a target layer or area with relatively good sealing properties can b...
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IPC IPC(8): G01V1/30G01V1/40
CPCG01V1/306G01V1/40
Inventor 薛罗史忠生王天奇方乐华陈彬滔马轮何巍巍白洁马凤良王磊贾义蓉
Owner PETROCHINA CO LTD