大庆石油地质与开发2018，Vol.37Issue(3)：82-89,8.DOI:10.19597/J.ISSN.1000-3754.201710040
多场耦合作用对水力裂缝形态的影响
INFLUENCES OF MULTI-FIELD COUPLING ACTION ON THE HYDRAULIC FRACTURE MORPHOLOGY
摘要
Abstract
In order to further study the changes of the geometrical shape of the hydraulic fracture,on the basis of the basic theory of thermo-hydro-mechanical coupling,the physical parameters in the fracturing process regard as the functions of the stress,strain,pore pressure and temperature.With the help of the calculating methods of DDM (displacement discontinuity method),finite difference and iterative calculating method,the influences of four coupling conditions of the thermo-hydro (TH),hydro-mechanical (HM),thermo-hydro-mechanical (THM) and non-thermo-hydro-mechanical (NTHM) on the crack morphology were analyzed.The achievements show that the coupling actions has little effects on the reservoir temperature,while they possess great influences on the fluid temperature in the fracture near the well bottom;the fracture morphology presents rather obvious differences when taking the coupling effects into account or not,the HM and THM coupling effects can relatively decrease the fracture length,fluid pressure within the fracture and the crack width,while the TH coupling effect manifests an opposite action;Corresponding to the NTHM coupling condition,The influence of HM coupling is the most prominent,the effect of TM coupling is relatively small,under the interaction of THM coupling,the shapes of the crack match best with the field tested data.关键词
水力压裂/裂缝形态/热流固耦合/流固耦合/有限差分Key words
hydraulic fracturing/crack/fracture morphology/thermo-hydro-mechanical (THM) coupling/hydro-mechanical (HM) coupling/finite difference分类
能源科技引用本文复制引用
胡永全,王强,史向阳,侯庆香,张倩,赵金洲..多场耦合作用对水力裂缝形态的影响[J].大庆石油地质与开发,2018,37(3):82-89,8.基金项目
国家自然科学基金项目“基于多尺度页岩复杂流动行为的动态评价模型研究”(51404204) （51404204）
中国石油化工股份有限公司科研项目“裂缝动态扩展影响因素研究”(31400026-16-ZC0607-0013). （31400026-16-ZC0607-0013）
