深水高压井负压力窗口固井关键技术  

Key technology for negative pressure-window cementing in high pressure deep water wells

作　　者：罗宇维[1] 陈良[1] 罗东辉[1] 宋茂林[1] 李占东[1] 

机构地区：[1]中海油田服务股份有限公司,河北三河065201

出　　处：《中国海上油气》2016年第4期83-87,共5页China Offshore Oil and Gas

基　　金：中国海洋石油总公司科研项目"深水固井关键技术研究与应用(编号:CNOOC-KJ 125 ZDXM12 LTD YF2015-01)"部分研究成果

摘　　要：南海陵水区块X1井钻遇异常高压气层,地层孔隙压力大于上层管鞋处的破裂压力,钻井液无法平衡地层压力,造成上漏下喷。针对深水高压井负压力窗口固井技术难点,采用"防漏+快凝+自修复+缓凝挤堵"4段功能水泥浆技术和配套工艺,成功实现了带钻具注水泥塞对高压气层进行有效封堵的固井作业,可为其他深水高压井负压力窗口固井作业提供借鉴。An abnormal high pressure gas reservoir was encountered during drilling operation of Well X1 in Lingshui block in the South China Sea. The pore pressure of the reservoir is higher than the formation fracturing pressure at the above casing shoe, so the reservoir pressure-cannot be balanced by drilling fluid, resulting in kick（probably evolving to blowout）at the hole bottom and lost circulation in the upper section. Aiming at the technical difficulties in negative pressure-window cementing in high pressure deep water wells, four special functional cement slurry slugs were employed, i.e., “leak-proof slurry, quick-setting slurry, self-healing slurry and retarded slurry”. The cement slugs were effectively displaced into position and the high pressure gas reservoir was successfully blocked with drill string. The cementing technology will be a good reference for negative pressure-window cementing in other wells in the future.

关 键 词：深水 高压井 负压力窗口 固井 四段功能水泥浆技术 

分 类 号：TE256[石油与天然气工程—油气井工程]