摘要：Hydraulic fracturing is an important stimulation treatment to create an enhanced geothermal system. Accurate interpretation of the breakdown pressure (the critical pressure at which "breakdown" takes place in hydraulic fracturing) can assist engineers to better performing hydraulic fracture treatment designs. The breakdown pressure is known to exhibit a dependence on wellbore size, pressurization rate, fluid viscosity, fluid infiltration, and fluid compressibility. Determination of breakdown pressure has been the subject of intense study for several decades. However, little attention has been drawn to effect of non-linear fluid compressibility on breakdown pressure. Here, we modified the Ito's tensile failure criterion by replacing the Terzaghi effective stress with a general effective stress and developed a breakdown criterion that accounts for fluid type and state. The present model gives good agreement with experimental data. Sensitivity studies are conducted to investigate the influences of fluid compressibility, fluid viscosity, and pressurization rate on the breakdown pressure. It indicates that 1) the non-linear compressibility effect inhibits the propagation of pore pressure perturbation, and 2) for inviscid fluid, the breakdown pressure is a constant, which corresponds to the lower limit of the breakdown pressure. The proposed model can provide some theoretical support in hydraulic fracturing treatment design.
Copyright © ARMA-CUPB Geothermal International Conference 2019.All rights reserved.

发表日期：2020-01-01

期刊分区（SCI为中科院分区）：无

收录情况：EI（工程索引）

发表期刊名称：ARMA-CUPB Geothermal International Conference 2019

通讯作者：张潘潘,张潘潘

第一作者：田守嶒,盛茂

论文类型：会议论文

论文概要：张潘潘,田守嶒,盛茂,张潘潘，Effect of fluid compressibility on hydraulic fracture breakdown pressure，ARMA-CUPB Geothermal International Conference 2019，2020，

论文题目：Effect of fluid compressibility on hydraulic fracture breakdown pressure