Pulse circulation hydrofracture pump injection frequency selection method and device

Abstract

The embodiment of the invention provides a pulse circulation hydrofracture pump injection frequency selection method and device. The method comprises the steps of conducting performance test on fracturing fluid to obtain fracturing fluid parameters, wherein the fracturing fluid parameters include the density and elasticity modulus of the fracturing fluid; determining pump injection environmental parameters according to the position of a pulse pump, wherein the pump injection environmental parameters include crack parameters representing the physical property of a crack or mineshaft parametersrepresenting the physical property of a mineshaft; solving the multi-order inherent frequency of a liquid column in the mineshaft or the crack of a fracturing well according to the fracturing fluid parameters and the pump injection environmental parameters based on the output mode of the pulse pump; simulating the conditions of the pulse pressure changing over time at the tail end of the mineshaftor the top of the crack through a preset model when the pump injection frequencies belong to different orders of inherent frequencies; and selecting the inherent frequency corresponding to the maximum pulse pressure amplitude value within the preset time according to the conditions of the pulse pressure changing over time as the pump injection frequency. Thus, the fracturing pump injection construction efficiency is improved.

Description

technical field [0001] The embodiments of this specification relate to the field of hydraulic fracturing of rocks, and in particular to a method and device for selecting pumping frequency of pulse circulation hydraulic fracturing. Background technique [0002] With the deepening of oil field development, the development of oil and gas reservoirs is becoming more and more difficult. In order to fully exploit oil and gas wells, the reservoir usually refers to the oil layer or gas layer to be treated by fracturing. In the field of petroleum, fracturing refers to a method of using hydraulic action to form cracks in oil and gas layers during the process of oil or gas recovery. The most common fracturing method is hydraulic fracturing. Fracturing is to artificially create fractures in the formation, improve the flow environment of oil underground, increase the production of oil wells, and play an important role in improving the flow conditions at the bottom of oil wells, slowing d...

AI Technical Summary

Problems solved by technology

These methods of selecting pulse pressure frequency are not supported by corresponding theoretical basis, and the selected pulse pressure frequency is often not the optimal pulse pressure frequency, which makes the fracturing efficiency of pulse circulation hydraulic fracturing not high

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