Method, device and apparatus for evaluating sealability of geological faults

Abstract

An embodiment of the present invention provides a method, device and apparatus for evaluating sealability of geological faults. By simulating the formation process of faults in the target geological layer, For each state formed by geological simulation layer in the simulation process, the fault distance of fault in geological simulation layer and the thickness of mudstone smeared simulation layerin fault are obtained, and the functional relationship between the fault distance of fault in geological simulation layer and the thickness of mudstone smeared simulation layer in fault is further obtained. According to the fault distance and function relation of the target geological layer, the thickness of mudstone smeared layer in the target geological layer is obtained, and the sealing property of the target geological layer is evaluated according to the thickness of mudstone smeared layer. The evaluation method, device and device fit the parameters corresponding to a plurality of states in the formation process of the fault in the geological simulation layer to the functional relationship, avoid the defect of randomness, improve the accuracy of the prediction of the thickness of the mudstone smeared layer in the fault, and improve the accuracy of the evaluation of the sealing property of the fault.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of geology, and more specifically, to a method, device and equipment for evaluating the sealing performance of geological faults. Background technique [0002] In geology, the seal of a fault refers to the nature of preventing fluid from continuing to flow due to the difference in displacement pressure between the rocks on the upper and lower walls of the fault or the fault zone and the rocks on the upper and lower walls of the fault, allowing them to gather to form a new physical and pressure system. In space, it is manifested as lateral closure and vertical closure. Faults play a dual role in the process of oil and gas migration and accumulation. The opening of faults provides channels for oil and gas migration, and the sealing of faults provides shelter for the formation of oil and gas reservoirs. The evaluation of fault sealing is of great significance to oil and gas exploration...

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Problems solved by technology

[0004] Measuring the thickness of the mudstone smear layer in the actual geological layer, on the one hand, it is difficult to determine the location of the fault, and on the other hand, there is too much randomness, which makes it difficult to measure the thickness of the mudstone smear layer obtained through actual measurement. , and the measurement accuracy is not high, resulting in inaccurate evaluation of the sealing of geological faults

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