低渗透油气藏“协同增效”钻井液及其作用机理  

Research on Synergistic Effect Drilling Fluid and Acting Mechanism in Low Permeability Reservoir

作　　者：李秀灵 陈二丁 

机构地区：[1]中石化胜利石油工程有限公司

出　　处：《钻井液与完井液》2013年第5期18-21,96,共4页Drilling Fluid & Completion Fluid

基　　金：胜利石油管理局项目"低渗透油气藏‘协同增效’型钻井液新体系研究与应用"(GKZ1105)

摘　　要：胜利油田低渗透油气藏具有储量大，油藏埋藏较深、物性差、储层成岩和压实作用强、非均质性严重、采出程度低和开发难度大等特点。以“协同增效”理论为基础，对研制的AMP油层保护剂和FCS防水锁剂进行了评价，形成了适合低渗透油气藏的“协同增效”钻井液。室内研究表明，AMP油层保护剂、FCS防水锁剂与聚合物钻井液体系配伍性好，当AMP加量为3％时，对岩心的封堵率大于90％，阻止了固相颗粒和滤液进入储层；当切去3．0～3．5mm的暂堵端后，渗透率恢复率大于95％；当FCS加量为0．3％时，钻井液滤液表面张力仅为18．5mN／m，降低了滤液的表面张力。AMP、FCS能与钻井液中其他处理剂协同作用，更好地保护低渗储层。The low permeability reservoirs of Shengli oilfield has some characteristics of deep buried,bad physical property, severe heterogeneity,low degree of reserve recovery and high development difficulty.Based on theory of Synergistic Effect,the agents of reservoir protection agent AMP and anti-water blocking agent FCS are evaluated,and the low permeability reservoirs drilling fluid system is developed in this paper.The evaluation results show that with the content of AMP 3%,the core plugging rate is more than 90%,after cut by 3.0-3.5 mm in the plugging side,the permeability recovery rate is more than 95%,with the content of FCS 0.3%,the surface tension of filtrate is only 18.5 mN/m,which the two self-developed agents can cooperate with other agents to protect reservoir well.

关 键 词：低渗透油气藏 钻井液 防止地层损害 临时性封堵 水锁 协同增效 

分 类 号：TE254.3[石油与天然气工程—油气井工程]