裂缝性致密砂岩气层暂堵性堵漏钻井液技术  

Drilling fluids for temporary sealing in fractured tight sandstone gas reservoirs

作　　者：王业众[1] 康毅力[2] 李航[1] 王光虎 柳高杰[4] 

机构地区：[1]中国石油西南油气田公司采气工程研究院 [2]"油气藏地质及开发工程"国家重点实验室.西南石油大学 [3]中国石油西南油气田公司川中油气矿南部采油气作业区 [4]四川天一科技股份有限公司

出　　处：《天然气工业》2011年第3期63-65,112-113,共3页Natural Gas Industry

基　　金：国家科技重大专项"低渗透油气田储层保护技术"(编号:2008ZX05022-04)

摘　　要：钻井液漏失是目前制约裂缝性致密砂岩气藏勘探开发的第一位因素，以往的工程实践对堵漏工艺及工程成功率关注较多，而对堵漏材料进入储层带来的储层损害以及如何高效解除则关注较少。堵漏材料一旦进入储层若不及时解除，就会造成严重的储层损害。为此，以“储层保护屏蔽暂堵技术思想”为指导，在评价常用堵漏材料酸溶性的基础上，提出集成惰性堵漏材料架桥与酸溶性堵漏材料填充优势的暂墙性堵漏钻井液技术新思路。通过室内探索性实验，优化了暂堵性堵漏钻井液配方，结果显示：基浆中酸溶性材料与惰性架桥材料加量的比值介于l：1～3：1之间为最佳。由此形成了暂堵性堵漏钻井液漏失控制技术。Lost circulation during drilling is the first dominating factor constraining the exploration and development of the fractured tight sandstone gas reservoirs.In the past more attention was paid to the plugging technology and the engineering success rate instead of the reservoir damage made by LCMs and the effective resolutions.The LCMs entering into formation will result in most serious formation damage if not properly disposed of in time.Therefore with the temporary plugging philosophy,based on the evaluation of the acid dissolution of conventional LCMs,a new lost circulation control method has been suggested which integrates the advantages of the bridging effects of the inert LCMs and the filling effects of the acid soluble LCMs.And then through indoor pilot tests,the formulation of this drilling fluid for temporary plugging is optimized and the optimal ratio of acid-dissolved materials and inert bridging material should be between 1∶1 and 3∶1.Field practices have proved the feasibility and applicability of this developed temporary-sealing plugging drilling fluid technology.

关 键 词：裂缝(地质) 致密砂岩气藏 储层损害 漏失 暂堵性堵漏 漏失控制 钻井液配方 合理性 

分 类 号：TE254[石油与天然气工程—油气井工程]