裂缝性储层井控技术体系探讨  

Well control technologies for fractured gas reservoirs

作　　者：刘绘新[1] 李锋[2] 

机构地区：[1]"油气藏地质及开发工程"国家重点实验室.西南石油大学 [2]中国石油塔里木油田公司

出　　处：《天然气工业》2011年第6期77-80,129-130,共4页Natural Gas Industry

基　　金：国家科技重大专项"塔里木盆地塔中碳酸盐岩油气勘探开发示范工程"中"碳酸盐岩礁滩型凝析气藏高效勘探开发应用技术"(编号:2008ZX05049-006)的研究内容之一

摘　　要：对于裂缝性储层,裂缝的存在使得井筒与储层之间拥有了良好的流动通道,流体的侵入(溢流)或流出(漏失)相对容易,常会出现储层压力敏感、溢漏频繁发生、压井成功率低等井控技术难题,基于渗透性储层特点的传统井控技术已不能有效确保其井控安全。为此,针对裂缝性储层的特点,从裂缝性储层溢流机理实验研究入手,结合传统的渗透性储层井控技术体系,建立了裂缝性储层井筒物理模型,阐述了裂缝性储层井控原理,构建了裂缝性储层井控技术,初步形成了适合裂缝性储层特点的井控技术体系。该技术体系不但能规避井下复杂情况、缩短钻井周期,同时还可以提高压井成功率、减少钻井液消耗量、降低钻井成本。应用结果表明,裂缝性储层井控技术体系有别于传统井控技术体系,对裂缝性储层具有较好的针对性和适用性,为解决塔中地区碳酸盐储层井控难题提供了可行的技术手段。In fractured reservoirs,the fractures therein produce a good communication between the wellbore and the reservoir,making the fluid incoming(kick) and fluid outflowing(loss) rather easy,and inducing well control problems of stress sensitivity,frequent kicks and lost circulations,and killing difficulties.The traditional well control technology based on the permeable formations can not ensure the well safety in the fractured reservoirs.In view of this,experimental studies of kick mechanism were first conducted based on the characteristics of fractured reservoirs.In combination with the traditional well control technology,a physical model for the wellbore in fractured reservoirs was then set up,illustrating the well control principles for such a reservoir and developing the corresponding well control technology.This technology can not only avoid downhole problems,shorten the drilling cycle,but also improve the success ratio of well killing,reduce drilling fluid consumption and drilling cost.This special well control technology,different from the traditional one,is proved to be applicable for the fractured reservoirs,providing a feasible technical means for well control in carbonate reservoirs in the middle Tarim Basin,so-called Tazhong area.

关 键 词：裂缝性 储集层 井控理论 井控技术 安全 塔里木盆地 碳酸盐岩 

分 类 号：P618.13[天文地球—矿床学]