A 2D explicit numerical scheme-based pore pressure cohesive zone model for simulating hydraulic fracture propagation in naturally fractured formation
摘要:In this work, a 2D pore pressure cohesive zone model is presented to simulate the hydraulic fracture propagation in naturally fractured formation, in which the fracturing process is governed by a bilinear cohesive zone model equipped with Coulomb's friction law and the fluid flow within the hydraulic fracture is described by the lubrication equation. In this model, fluid leak-off into rock matrix is ignored and a fully explicit temporal integration scheme is adopted to overcome the convergence issue of conventional implicit scheme (eg, Newton-Raphson method). The advantage of the proposed model is that it does not require any special crossing criterion to determine the interaction behavior when the hydraulic fracture hits the natural fracture. Implementation of the model was described in detail, and then, the model was verified with well-known analytical solution of KGD problem and criteria of hydraulic fracture crossing natural fracture. The capability of the proposed model to capture the interaction behavior between hydraulic fracture and natural fracture was demonstrated by the good agreement of the modeling result and analytical solution. Several numerical cases were performed to investigate the impact of key factors on fracture network evolution during hydraulic fracturing treatment. Results show that fracture network is not only governed by the spatial distribution of natural fracture, but also greatly affected by the initial hydraulic aperture of natural fracture and in situ stress contrast.
关键字:cohesive zone model explicit temporal integration hydraulic fracturing naturally fractured reservoir
ISSN号:2050-0505
卷、期、页:卷: 7 期: 5 页: 1527-1543
发表日期:2019-10-01
影响因子:2.172000
期刊分区(SCI为中科院分区):三区
收录情况:SCIE(科学引文索引网络版),ESI(基本科学指标数据库)
发表期刊名称:ENERGY SCIENCE & ENGINEERING
参与作者:Li, Yang,Yang, Yingxin,Zhu, Haiyan
第一作者:刘伟,邓金根
论文类型:期刊论文
论文概要:Li, Yang,刘伟,邓金根,Yang, Yingxin,Zhu, Haiyan,A 2D explicit numerical scheme-based pore pressure cohesive zone model for simulating hydraulic fracture propagation in naturally fractured formation,ENERGY SCIENCE & ENGINEERING,2019,卷: 7 期: 5 页: 1527-1543
论文题目:A 2D explicit numerical scheme-based pore pressure cohesive zone model for simulating hydraulic fracture propagation in naturally fractured formation