Post-pressurization capacity evaluation method based on microseism interpretation results

Abstract

The invention discloses a post-pressurization capacity evaluation method based on microseism interpretation results in the technical field of microseisms. The evaluation method comprises the followingsteps that microseism event information is monitored in real time through a plurality of detector arrays; the microseism event information is detected in real time; according to a microseism detection result, a discrete fracture network model is established by combining geological information and wellhead pressure monitoring information; the post-pressurization capacity is evaluated according tothe discrete fracture network model. The method can greatly improve the detection capability of weak earthquake events, not only can evaluate the fracturing effect, but also can feed back the real-time monitoring result to hydraulic fracturing construction to achieve the optimal fracturing effect at lower cost.

Description

technical field [0001] The invention discloses a post-fracture production capacity evaluation method based on microseismic interpretation results, specifically in the field of microseismic technology. Background technique [0002] When new wells of oil, gas and water wells are put into production or undergone hydraulic fracturing, at the perforation position, when the rapidly rising wellbore pressure exceeds the compressive strength of the rock, the rock is destroyed, cracks are formed, and when the cracks expand, a series of The propagating microseismic waves are received by multiple monitoring substations arranged around the fracturing well. According to the arrival time difference of the microseismic waves at each substation, the location of the microseismic source can be determined through calculation, and then the orientation of the fracture distribution, Geological parameters such as length, height, and in-situ stress direction can be combined with wellhead pressure mo...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a post-fracture productivity evaluation method based on microseismic interpretation results to solve the weak detection ability of the current microseismic source temporal and spatial distribution monitoring information proposed in the above background technology. In addition, the current microseismic monitoring can only evaluate the fracturing effect , unable to provide feedback on hydraulic fracturing construction issues

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