安塞油田重复压裂技术探讨  

Discussion on multiple fracturing technology in Ansai Oilfield

作　　者：雷群[1] 宋振云[1] 吴增智[1] 

机构地区：[1]长庆石油勘探局钻采工艺研究院,西安长庆兴隆园710021

出　　处：《钻采工艺》1999年第5期26-28,36,共4页Drilling & Production Technology

摘　　要：安塞油田随着开发时间推进，老井出现低液面、低流压、采液和采油指数下降、综合含水上升、产量递减率增大、裂缝主向油井与侧向油井压力差异大等日益突出的矛盾，这直接影响油田开发效益和最终采收率，对油田稳产造成严重威胁。作为特低渗透油层改造进攻性措施之一的重复压裂改造技术，面临着如何提高特低渗透油田经济效益的技术难题。文中较系统地分析安塞油田重复压裂改造工艺和压裂效果，阐述影响油井产量降低的各种因素，找出油井重复压裂改造工艺技术存在的难题，明确低渗透油层重复压裂技术发展方向，为今后提高安塞特低渗透油田重复改造提出了具体目标。With development of Ansai Oil field,old wells have many poor production features such as low liquid level,low flowing pressure,fluid productivity and oil productivity index decrease,combined water cut rise,an increase in production decline rate,higher pressure differential between the main direction oil well and lateral oil well of a fracture etc.These features can affect oilfield development benefit,recovery efficiency and oilfield stable production.Multiple fracturing technology faces the technical problem of how to improve economic benefits of ultra low permeability oilfield.Multiple fracturing technology and postfracture response are analysed systematically in Ansai Oilfield.All kinds of factors leading to oil well production decrease are described.Existing problems in oil well multiple fracturing technology are found.Developing direction of multiple fracturing technology in ultra low permeability reservoirs is determined.Meantime,specific research targets are proposed for improving ultra low permeability reservoir rebuild in Ansai Oilfield.

关 键 词：安塞油田 低渗透油气藏 重复压裂 压裂工艺 

分 类 号：TE357.13[石油与天然气工程—油气田开发工程]