摘要
印尼JABUNG油田的Gumai泥页岩地层水敏性极强,因井壁失稳造成的井眼事故频繁发生。通过选用新型抗高温聚合物包被抑制剂GWTEMP、沥青类抗高温降滤失封堵剂GWTEX,并引入油基钻井液用降滤失封堵剂GSL(黑色液态褐煤乳液)等高效处理剂,构建了满足JABUNG油田钻井需要的KCl-GWTEMP强抑制性钻井液体系,其中GWTEMP抗温在205℃以上,抗盐达饱和,分子量较其他聚合物包被剂分子量低,易溶于水。室内实验和现场试验均证明,该钻井液具有良好的流变性、降滤失性、封堵和抑制性能,能保持井壁稳定;极压润滑系数在0.05以下,可很大程度地减少高扭矩和压差卡钻等的发生;试验井井眼规则,电测井径扩大率仅为3.14%。
Trouble some of borehole stability is often encountered in JABUNG oilfield of Indonesia,which is caused by strong water sensitive Gumai shale.The KC1-GWTEMP drilling fluid system is developed with additives of GWTEMP,asphalt sealing agent GWTEX and filtrate reducer GSL (black lignite emulsion),in which the GWTEMP is a novel high temperature (over 205℃) polymer encapsulating and inhibiting agent.The laboratory and application results show that the drilling fluid system has good performances of rheology,filtration.scaling and inhibiting,the extreme pressure lubricating factor is 1essthan 0.05,which the borehole diameter enlargement rate is only 3.14%.
出处
《钻井液与完井液》
CAS
北大核心
2012年第6期31-34,87-88,共4页
Drilling Fluid & Completion Fluid
基金
国家科技重大专项"高温高应力定向井井壁稳定技术及应用"
中石油长城钻探重大科技专项"印尼JABUNG油田井壁稳定技术研究"
关键词
KCl聚合物强抑制性钻井液
高温
井眼稳定
包被抑制剂
降滤失封堵剂
JABUNG油田
KC1 polymer strong inhibition drilling fluid
High temperature
Borehole stability
Encapsulating and inhibiting agent
Filtration control and sealing agent
JABUNG oilfield
