Method and device for determining fault displacement
A technology of faults and fault throws, which is applied in the field of oilfield exploration seismic data interpretation, and can solve problems such as the calculation of strike-slip faults that are difficult to strike-slip, and the vertical dislocation of strike-slip faults is not obvious.
Active Publication Date: 2018-02-02
PETROCHINA CO LTD
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Problems solved by technology
Since the vertical dislocation of strike-slip faults is not obvious, and the strike-slip throw of strike-slip faults is mainly the fault throw in the horizontal direction, the existing methods for determining fault throws may be difficult to determine the strike-slip fault throw based on structural maps. Accurate calculation of slip distance
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[0043] Embodiments of the present application provide a method and device for determining a fault throw.
[0044] 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.
[0045] The embodiment of the present application provides a method for determining a fault throw. The method provides seismic data for an interval of interest.
[0046] In this embodiment, the target interval may be an underground ...
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An embodiment of the invention discloses a method and device for determining fault displacement. The method provides seismic data of an objective interval, and comprises the following steps: based ona frequency range of the seismic data, carrying out spectral decomposition processing on the seismic data to obtain a plurality of seismic frequency division data of the objective interval, and obtaining specific seismic frequency division data from the plurality of seismic frequency division data, wherein the specific seismic frequency division data is used for reflecting fault information in theobjective interval; carrying out coherent processing on the specific seismic frequency division data to obtain coherent data, wherein the coherent data comprises a plurality of data points and coherent coefficients of the data points; based on the coherent data, determining cutting relationship between a fault in the objective interval and karst beads; and according to the cutting relationship, determining the fault displacement. According to the technical scheme, the method can improve accuracy in determining the fault displacement.
Description
technical field [0001] The present application relates to the technical field of oil field exploration seismic data interpretation, in particular to a method and device for determining fault throw. Background technique [0002] The strong pressure and tension generated during the crustal movement exceed the strength of the rock layer itself, causing the rock layer to break. At the same time, the structural form formed by the relative movement of the rock blocks on both sides of the rock layer along the fracture surface can be called a fault. In the early stage of fault formation, diagenetic fluids flowed and dissolved along faults to form fractured cave reservoirs, which became oil and gas storage spaces. Later, oil and gas migrated vertically along faults and finally formed reservoirs. Faults and their surrounding areas are usually the main distribution areas of oil and gas, and are favorable targets for oil and gas exploration and well deployment. It can be seen that faul...
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IPC IPC(8): G01V1/30
Inventor 宁超众姚子修李勇郭智刘立峰谭柱马源沈秉北曾经
Owner PETROCHINA CO LTD