西安石油大学学报（自然科学版）2017，Vol.32Issue(5)：62-67,95,7.DOI:10.3969/j.issn.1673-064X.2017.05.010
层理对页岩储层压裂改造效果影响的实验研究
Experimental Study on Influence of Bedding Planes on Stimulation Effect of Hydraulic Fracturing in Shale Reservoir
摘要
Abstract
In order to study the influence of bedding planes on the stimulation effect of hydraulic fracturing in the vertical direction of shale reservoir,a series of large-scale true tri-axial fracturing simulation experiments were performed using the core samples mined from the outcrops of Longmaxi shale.The propagation law of hydraulic fracture in vertical direction was analyzed,and the stimulation results under different experimental conditions were quantitatively evaluated according to the interpretation results of acoustic emission localization.It is indicated that the fracturing stimulation result in vertical direction is controlled by the vertical stress and the characteristics of bedding planes.High vertical stress (30 MPa) is beneficial for hydraulic fracture connecting more bedding planes.Weakly cemented bedding planes will restrain the propagation of the hydraulic fracture in vertical direction,resulting in the worse stimulation result in vertical direction.With the increase of the number of activated bedding planes,the geometry of the fracture becomes more complex,the formation was stimulated more completely in vertical direction,so the (effective) stimulated reservoir volume is larger.Moreover,the disturbance of the original opening bedding planes leads to the difference between SRV and ESRV.关键词
水力压裂/改造效果/页岩/层理/声发射Key words
hydraulic fracturing/stimulation result/shale/bedding plane/acoustic emission分类
能源科技引用本文复制引用
李彦超,马新仿,李宁,肖剑锋,何封,张一诺,刘自中..层理对页岩储层压裂改造效果影响的实验研究[J].西安石油大学学报（自然科学版）,2017,32(5):62-67,95,7.基金项目
国家重大专项课题“水平井压裂设计优化系统”(2016ZX05023-001) （2016ZX05023-001）
