摘要：The article presents a detailed finite-element model for investigating hydraulic fracture propagation in weakly consolidated sandstone. Elastoplastic deformation of the rock matrix, pore fluid flow, initiation and propagation of hydraulic fractures as well as flow of fracturing fluid within a fracture and leakoff into the formation are considered interdependently. The extended Cam-Clay model is used to achieve a more precise assessment of the mechanical behavior of weakly consolidated sandstone. Parametric studies are performed to investigate the effect of the fracturing parameters on the fracture patterns. The numerical results show that extremely short and narrow fractures are formed if low-efficiency fracturing fluid is used to initiate fractures in weakly consolidated sandstone with a zone of shear dilation formed on both faces of the fracture. In contrast, longer and wider fractures initiation of which is desirable in frac-pack (hydraulic fracturing) operations with the use of proppant may be obtained with the use of high- efficiency fracturing fluid and more compact zones are created near the fracture. However, the structure of the compaction zone produces an insignificant decrease in permeability. It is also shown that plastic deformation of the rock matrix has a significant impact on the geometry of a fracture, and this must be taken into account in the design of frac-pack operations with the use of proppant in weakly consolidated sandstone reservoirs.
© 2018, Springer Science+Business Media, LLC, part of Springer Nature.

ISSN号：0009-3092

卷、期、页：v 53,n 6,p943-955

发表日期：2018-01-01

影响因子：0.317000

期刊分区（SCI为中科院分区）：四区

收录情况：SCIE（科学引文索引网络版）,ESI（基本科学指标数据库）,EI（工程索引）

发表期刊名称：CHEMISTRY AND TECHNOLOGY OF FUELS AND OILS

通讯作者：范白涛,林海

第一作者：邓金根,刘伟,谭强

论文类型：期刊论文

论文概要：范白涛,邓金根,林海,刘伟,谭强，Numerical Simulation of Hydraulic Fracturing in Weakly Consolidated Sandstone，CHEMISTRY AND TECHNOLOGY OF FUELS AND OILS，2018，v 53,n 6,p943-955

论文题目：Numerical Simulation of Hydraulic Fracturing in Weakly Consolidated Sandstone