摘要
晋 93 2 8X井和晋 94 7X井是冀中坳陷束鹿西斜坡晋 93北断块和晋 94断块上的高难度定向井。这两口井井斜角和水平位移大 ,靶点多 ,裸眼段长 ,加之沙一段底部地层含有一套灰色膏质泥岩 ,给钻井施工增加了较大的难度。采用有机黑色正电胶钻井液 ,并配合固体、液体润滑剂防卡和岩屑床控制以及井壁稳定技术 ,满足了高难度定向井的钻井施工要求。应用结果表明 ,有机黑色正电胶钻井液具有较强的润滑防卡能力和井壁稳定能力 ,携砂悬浮和剪切稀释能力强 ,利于提高机械钻速 ,有效地防止了压差卡钻和井壁坍塌卡钻的发生 ,井眼清洁。采用的钻井液工艺技术满足了井斜角达 6 1°、水平位移达 75 4 .78m的长裸眼、多靶点高难度定向井对钻井液的要求 。
Well Jin93-28X and well Jin94-7X are directional wells of high challenge located in Jin93 Northern Block and Jin94 Block respectively in Jizhong down warping region. With such characteristics as high deviation angle, long horizontal displacement, multiple target points, long open hole section of these two wells and a grey creaming mudstone to be drilled through, both wells are difficult to drill. The organic black positive gel (BPG) drilling fluid was employed, combined with pipe-sticking prevention by solid and liquid lubricants and hole stabilization technologies. Field using showed that this fluid exhibits good pipe-sticking prevention and hole stabilization, and its shear thinning property is evident. Penetration rate was increased, pipe-sticking was avoided and the hole was well cleaned. Although the deviation angle of Jin92-38X was 61°and the horizontal open hole of Jin94-7X was 754.78 m, no problem was encountered during drilling.
出处
《钻井液与完井液》
CAS
北大核心
2004年第4期42-44,共3页
Drilling Fluid & Completion Fluid
关键词
定向井
钻井液
井眼
钻井工程
润滑剂
organic BPS drilling fluid, pipe -sticking, hole cleaning, hole stabilization, directional drilling
