摘要
针对塔北玉东区块上部地层缩径阻卡、膏盐岩层蠕变缩径和垮塌卡钻、高密度盐水钻井液流变性及滤失量控制难等一系列问题,玉东7-4-2井通过对钻井液技术的优化,解决了阻卡和膏盐层井眼稳定等问题,易塌层段井径扩大率仅为7.5%,钻井周期比邻井节约20d以上,提速效果显著。
Drilling operations in the Block Yudong in north Tarim Basin have long been faced with a series of problems, such as tight hole in the upper formations which results in drag and overpull, creeping of salt/gypsum sections which results in tight spots, sloughing and pipe sticking, and difficulties in controlling rheology and filtration of the drilling fluid because of high mud weight. By optimizing the drilling fluid technology on the well Yudong-7-4-2, drag, overpull and borehole wall instability have all been resolved. Percent hole washout in easy-to-collapse sections was only 7.5%. Drilling time was 20 days less than wells drilled nearby, indicating the ROP was greatly increased.
作者
肖金裕
周华安
孙俊
刘毅
陈富全
汪凯
XIAO Jinyu;ZHOU Hua’an;SUN Jun;LIU Yi;CHEN Fuquan;WANG Kai(Drilling Fluid Technology Service Company of Chuanqing Drilling Engineering Company, Chengdu, Sichuan 610056;Xinjiang Branch Office of CCDC, Korla, Xinjiang 841000;Natural Gas Business Unit of Tarim Oil Field, Korla, Xinjiang 841000)
出处
《钻井液与完井液》
CAS
北大核心
2019年第3期321-324,共4页
Drilling Fluid & Completion Fluid
关键词
聚磺欠饱和盐水钻井液
封堵防塌
膏盐层
蠕变
垮塌
卡钻
提速提效
盐下油气藏
Polysulfonate/under-saturated salt water drilling fluid
Plugging and borehole collapse prevention
Gypsum/salt layer
Creep
Sloughing control
Sticking
Increase drilling rate and enhance drilling efficiency
Pre-salt oil and gas reservoir