安塞油田见水特征分析及中高含水井增产工艺  

Analysis of water breakthrough features in Ansai Oilfield and production increase technology for medium-high water cut wells

作　　者：姬伟[1] 梁冬[1] 黄战卫[1] 张育超[1] 牛萌[2] 李东旭[1] 

机构地区：[1]中国石油长庆油田分公司第一采油厂,陕西延安716000 [2]延长油田股份有限公司勘探开发研究中心,陕西延安716000

出　　处：《石油钻采工艺》2014年第6期86-89,共4页Oil Drilling & Production Technology

基　　金：长庆油田分公司科研项目"老油田油井控水增油技术研究与应用"(编号:2012180012362)

摘　　要：安塞油田是开发30年的"低压、低渗、低产"老油田,大量油井目前已逐步进入中高含水期开发,仅靠常规增产工艺稳产难度大。目前对中高含水井的改造较为谨慎,不同见水类型下可选工艺仍存在盲区,降水增油方向仍不明朗。针对安塞油田中高含水井不同开发特征及见水类型,开展了改变相渗压裂、堵水压裂等几种进攻性措施,以及化学堵水、二次固井等维护性措施,实践证明各项工艺在不同见水类型井的适应性存在差异,尚不存在一种工艺可解决不同见水特征下油井的降水增产问题,须因地制宜针对性地选择有效工艺方能取得较好的措施效果。Ansai Oilifeld is a matured oilifeld of low pressure, low permeability and low production which has been developed for 30 years;a large number of oil wells are now in medium-high water cut development stage, so it is very dififcult to maintain stable pro-duction only by conventional production increasing technologies. At present, it is still prudent to stimulate the medium-high water cut oil wells, there is still blind spot in optional technology under different water breakthrough types, and the direction of reducing water cut and increasing oil production is not yet clear. In view of the different development features of medium-high water cut oil wells and dif-ferent water breakthrough types in Ansai Oilifeld, some aggressive measures were implemented such as fracturing by changing relative permeability and water-plugging fracturing as well as maintenance measures like chemical water plugging and the second cementing, etc. The practice shows that various technologies are different in adaptability to different water breakthrough types, and there is no one technology which can solve the problem of reducing water cut and increasing oil production under different water breakthrough features. So selecting the proper technology which suits the actual conditions can achieve the satisfactory results.

关 键 词：安塞油田 中高含水井 增产措施 改变相渗压裂 堵水压裂 体积压裂 二次固井 

分 类 号：TE357[石油与天然气工程—油气田开发工程]