重复压裂初裂缝有效率评价方法  

Evaluation Method for Efficiency of Primary Fracture in Refracturing

作　　者：任岚[1] 胡永全[1] 赵金洲[1] 冉乙钧[1] 刘文君[2] 

机构地区：[1]西南石油大学研究生院,四川成都610500 [2]四川石油管理局川东开发公司,重庆401220

出　　处：《大庆石油地质与开发》2006年第3期70-72,共3页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家"十五"科技攻关项目"重复压裂工艺研究"(2001BA605A-05-02-03)的部分成果

摘　　要：在对重复压裂井进行产能评价时,常常认为初次压裂形成的裂缝完全失效,这种考虑与实际情况是不相符合的,导致对重复压裂井的产能预测有很大的误差。为此,建立了裂缝有效率评价及重复压裂井产能评价的数学模型和模型的数值求解方法,考虑只有初裂缝存在,根据重压前的产量和含水率,通过调整初裂缝的各参数,拟合计算了初裂缝的有效率。在考虑重复压裂裂缝和初裂缝共同作用下,对重复压裂井进行了产能评价,验证了重复压裂井中初裂缝的有效性。When estimating productivity of refractured well,the primary fracture is considered to be disabled and it is not coincident with actual facts and a great error of prediction result exists.Therefore,a mathematic model and corresponding solution numerically solbing method,for efficiency appraisal of fracture and productivity estimations,are provided in this paper.Based on post-refracturing production data and water cut,considering that only primary fracture exists,its efficiency is coupled by adjusting parameters.The productivity of refractred well is further calculated taking account into the interaction of refractured fracture and primary productivity and meanwhile the efficiency of primary fracture is validated.

关 键 词：重复压裂 初裂缝 有效率 裂缝失效 数学模型 数值求解 

分 类 号：TE357.13[石油与天然气工程—油气田开发工程]