摘要：Because of the inherent complexity of shale reservoirs and pre-existing natural fractures (NF) and faults, an accurate characterization of hydraulic fracture propagations has not been well investigated. This paper proposed an integrated geoengineering method to comprehensively characterize the non-uniform fracture propagations in shale reservoirs, integrating high-quality threedimensional (3D) seismic, well-logging, experiments, and microseismicity. The results show that the Duvernay shale is strongly heterogeneous in petrophysics and geomechanics. The Duvernay shale reservoir is controlled by two phases of tectonics, resulting in the development of high-angle natural faults/fractures with average azimuths of NE18 degrees and SE115 degrees. Considering the coupling between NF as well as stress shadowing effects, a full hydro-mechanical coupling model for hydraulic fractures (HF) was developed and restrained by up to 25,000 microseismicity events. Simulated post-frac productivity conforms to the actual productivity by up to 87%, showing the robustness of the unconventional fracture model. The pre-existing faults should be recognized beforehand, and some mitigation strategies can be made to avoid hydraulic communications between hydraulic fractures and pre-existing faults, effectively developing unconventional shale resources.

关键字：Natural-hydraulic fracture networks; Duvernay Shale; Hydro-mechanical coupling model; Post-frac production prediction; Preventing fault failures

ISSN号：1350-6307

卷、期、页：卷: 173

发表日期：2025-05-15

期刊分区（SCI为中科院分区）：二区

收录情况：SCI（科学引文索引印刷版）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：ENGINEERING FAILURE ANALYSIS

参与作者：Hu, Yafei,Song, Rui,Zhang, Ke,Gu, Fei

通讯作者：包鹏虎,皮之洋,李烨,葛琛琦,姚福裕,张雨杰

第一作者：惠钢,CHEN ZHANGXING

论文类型：期刊论文

论文概要：包鹏虎,惠钢,Hu, Yafei,Song, Rui,CHEN ZHANGXING,Zhang, Ke,皮之洋,李烨,葛琛琦,姚福裕,张雨杰,Gu, Fei，Comprehensive characterization of hydraulic fracture propagations and prevention of pre-existing fault failure in Duvernay shale reservoirs，ENGINEERING FAILURE ANALYSIS，2025，卷: 173

论文题目：Comprehensive characterization of hydraulic fracture propagations and prevention of pre-existing fault failure in Duvernay shale reservoirs