Pulse circulation hydrofracture pump injection frequency selection method and device

A hydraulic fracturing and pulse cycle technology, applied in the field of rock hydraulic fracturing, can solve the problems of low efficiency of pulse cycle hydraulic fracturing, not pulse pressure frequency, etc.

Active Publication Date: 2020-10-20
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
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  • Claims
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Problems solved by technology

These methods of selecting pulse pressure frequency are not supported by corresponding theoretical basis, and the selected pulse pressure frequ

Method used

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  • Pulse circulation hydrofracture pump injection frequency selection method and device
  • Pulse circulation hydrofracture pump injection frequency selection method and device
  • Pulse circulation hydrofracture pump injection frequency selection method and device

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Embodiment Construction

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present specification in combination with the drawings in the embodiments of the present specification. Obviously, the described embodiments are only some of the embodiments of the present specification, not all of them. Based on the embodiments in this specification, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of this specification.

[0022] In the embodiment of this specification, the pulse cycle hydraulic fracturing is a fracturing method, which is characterized in that a certain frequency of pulse pressure is applied to the reservoir, under the action of the pulse pressure, fatigue damage occurs to the rock, and then complex seam. The pump injection frequency is the pulse pressure frequency provided by the pulse pump.

[0023] The existing method for selecting the pulse pressu...

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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...

Claims

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Application Information

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IPC IPC(8): E21B43/26F04B49/06
CPCE21B43/26F04B49/065
Inventor 侯亚南彭岩陈掌星刘一杉马智骁王一博张柯蒋佩佳
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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