Finite element simulation of dynamic fracture in hydraulic fracturing

被引：0

作者：

Zhao, Yizhong ^{[1
]}

Cheng, Yuanfang ^{[1
]}

Qu, Lianzhong ^{[1
]}

Wang, Jingyin ^{[1
]}

Shen, Haichao ^{[1
]}

机构：

[1] College of Petroleum Engineering, China University of Petroleum, Dongying 257061, China

来源：

Shiyou Xuebao/Acta Petrolei Sinica | 2007年 / 28卷 / 06期

关键词：

Finite element method - Fluids - Fracture - Geometry - Hydraulic fracturing - Mathematical models - Mechanical permeability - Porous materials - Solids - Velocity;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

A finite element simulation model for dynamic fracture creation was established on the basis of the fluid-solid coupling theory for porous media. The creation of dynamic fractures with different geometry was simulated with finite element method. The research results demonstrated that a tight zone as elliptic distribution was developed around the wellbore during the creation of dynamic fracture. For the wedge fracture and elliptic fracture, the dimension of influence region by fracture creation increased with the fracture width increasing near the fracture tip, and the distribution of the influence zone was similar to ellipse. The permeability in the region less than 5m away from the wellbore axis was influenced dramatically. The more adjacent to the wellbore axis, the more sensitive the permeability alteration would be observed. At the same time, the Darcy velocity decreases noticeably in the tight zone near wellbore. The fracture with shorter length would result in the more sensitive for the productivity alteration of fractured wells. The formation of tight zone by dynamic fracture creation is an important factor for inducing the declination of productivity of fractured wells.

引用

页码：103 / 106