摘要：Unconventional reservoirs usually contain many weak surfaces such as faults, laminae and natural fractures, and effective activation and utilization of these weak surfaces in reservoirs can significantly improve the extraction effect. In hydraulic fracturing, when the artificial fracture approaches the natural fracture, the natural fracture would be influenced by both the original in-situ stress field and the hydraulic fracturing-induced stress field. In this paper, the hydraulic fracturing-induced stress field is calculated based on the relative position of hydraulic fracture and natural fracture, the original in-situ stress, the net pressure inside the hydraulic fracture and the pore pressure of the formation. Furthermore, the stability model of the natural fracture is established by combining the Mohr-Coulomb rupture criterion, and extensive parametric studies are conducted to explore the impact of each parameter on the stability of the natural fracture. The validity of the proposed model is verified by comparing with the reservoir characteristics and fracturing process of the X-well 150–155 formation in the Songliao Basin. It is found that the stress field induced by the hydraulic fracture inhibits the activation of the natural fracture after the artificial fracture crossed the natural fracture. Therefore, for similar reservoirs as X-well 150–155, it is suggested to connect natural fractures with hydraulic fractures first and then activate natural fractures which can effectively utilize the natural fractures and form a complex fracture network. ? 2023 The Authors

ISSN号：1672-5107

卷、期、页：卷20期5：3119-3130

发表日期：2023-10-01

影响因子：0.000000

期刊分区（SCI为中科院分区）：二区

收录情况：EI（工程索引）,CSCD（中国科技引文期刊）（核心）

发表期刊名称：Petroleum Science

通讯作者：白杰,温野群

第一作者：王小琼,葛洪魁,孟胡

论文类型：期刊论文

论文概要：白杰,王小琼,葛洪魁,孟胡,温野群，Effect of hydraulic fracturing induced stress field on weak surface activation during unconventional reservoir development，Petroleum Science，2023，卷20期5：3119-3130

论文题目：Effect of hydraulic fracturing induced stress field on weak surface activation during unconventional reservoir development