Numerical simulation of modified zipper-type hydraulic fracture propagation in horizontal wells based on extended finite element method

被引：5

作者：

Feng Q. ^{[1
]}

Li D. ^{[1
]}

Shi X. ^{[1
]}

Wang S. ^{[1
]}

Xu S. ^{[1
]}

Qin Y. ^{[2
]}

An J. ^{[3
]}

机构：

[1] School of Petroleum Engineering in China University of Petroleum (East China), Qingdao

[2] PetroChina Research Institute of Petroleum Exploration & Development, Beijing

[3] Oil & Gas Technology Research Institute, Changqing Oilfield Company, PetroChina, Xi'an

来源：

Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | 2019年 / 43卷 / 02期

关键词：

Extended finite element; Fracture interference; Horizontal well; Modified zipper-type hydraulic fracture; Numerical simulation;

D O I：

10.3969/j.issn.1673-5005.2019.02.013

中图分类号：

学科分类号：

摘要：

In order to study the crack propagation of modified zipper-type fractures in horizontal wells, based on the fluid-solid interaction theory, an extended finite element method was utilized to study the influences of fracture cluster spacing, crustal stress, and other factors on the pattern of fracture propagation and the induced rock stress in the process of modified zipper-type fracturing. The results show that large crack spacing can decrease the stress interferences between fracture clusters, while its influence to each crack is different. Large cluster spacing can cause the zipper-type fracturing cracks which have more similar morphology and long length. It also can make the cracks evenly extending from the perforation to both sides in the rock matrix, thus leading to stable development of the reservoirs. Large crustal stress can make the crack propagation more uniformly and reduce the risks of crack deflection. To some extent, it can decrease the risk of crack mergence between two horizontal wells. © 2019, Periodical Office of China University of Petroleum. All right reserved.

引用

页码：105 / 112

页数：7

共 16 条

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