鲁迈拉油田防漏堵漏工艺技术  

Application on Lost Circulation Prevention and Control Technology in Rumaila Oilfield

作　　者：邹大鹏[1] 刘永贵[1] 耿晓光[1] 李海[1] 竹学友[1] 

机构地区：[1]大庆钻探工程公司钻井工程技术研究院,黑龙江大庆163431

出　　处：《钻井液与完井液》2012年第6期35-38,88,共4页Drilling Fluid & Completion Fluid

摘　　要：伊拉克鲁迈拉油田地质条件十分复杂,漏层为碳酸盐沉积原生孔隙和成岩作用与构造运动所形成的孔洞、裂缝,漏失通道从微米级至厘米级,二开地层具有"上下漏、中间喷"的层位分布特点,同一裸眼段存在多套压力体系,钻井液漏失严重,堵漏施工时间长。通过室内研究,提出以下防漏堵漏技术:为防止上部地层的漏失,优选出(2%～3%)DLX-1+(2%～3%)QNPB作随钻堵漏剂;当漏失速率为2～5 m3/h时可用钻井液快速钻穿漏层,采用静止堵漏或憋压堵漏;对于严重漏失,可采用清水盲钻,一次性把漏层都钻完,然后注入高效承压剂复合堵漏桥浆,高效承压剂能够在漏失孔道内迅速膨胀,配合刚性复合堵漏剂架桥,高效承压剂能很好地与岩石表面吸附完成漏层填充,提高地层的承压能力及堵漏成功率,再结合现场情况适当采用打水泥塞彻底封堵漏层。该高效承压复合堵漏技术、防漏堵漏工艺以及相关的工程技术措施,满足了鲁迈拉区块钻井安全顺利施工的需求。In Rumaila oilfield,the leakage formations are holes and fractures formed by depositional carbonatite and diagenic metamorphism,the diameters of leakage channels cover from micron order to centimeter sized,and several formation pressure systems are encountered in one open hole.The high efficiency pressure containment additive bridge cement compound lost circulation control technology is applied successfully.In the second interval,the cone bit without nozzle is used to blind drill through Dammam formation with fresh water once the leakage happens,which saves much time and improves the success rate of lost circulation control operation.

关 键 词：井漏 清水盲钻 失返漏失 高效承压剂 复合堵漏鲁迈拉油田 

分 类 号：TE282[石油与天然气工程—油气井工程]