漏失地层封堵层致密性与承压能力试验研究  

Study on tightness and pressure-bearing of sealing layer in lost circulation formation

作　　者：金勇 陈彬 张伟[2] 狄明利[3] 苗海龙[2] JIN Yong;CHEN Bin;ZHANG Wei;DI Mingli;MIAO Hailong(China National Offshore Oil Corporation Shenzhen Branch,Shenzhen 518054,Guangdong,China;China Oilfield Services Limited,Sanhe 065201,Hebei,China;China Oilfield Services Limited Shenzhen Branch,Shenzhen 518054,Guangdong,China)

机构地区：[1]中海石油(中国)有限公司深圳分公司,广东深圳518054 [2]中海油田服务股份有限公司,河北三河065201 [3]中海油田服务股份有限公司深圳分公司,广东深圳518054

出　　处：《能源化工》2023年第1期44-47,共4页Energy Chemical Industry

基　　金：中海石油(中国)有限公司深圳分公司科研项目“陆丰惠州区域钻井防漏堵漏技术研究”(YXKY-ZL-SZ-2020-05)。

摘　　要：井漏是钻井作业过程中常见的井下复杂情况之一,目前防漏堵漏的常用手段是通过堵漏材料封堵漏失地层,恢复井筒压力以确保正常钻进,不同类型堵漏材料对漏失地层封堵承压的效果不同。通过封堵层渗透率评价试验、井筒压力恢复试验及裂缝封堵模拟评价试验考察了堵漏材料类型及搭配对裂缝封堵层承压效果和井筒压力恢复效果的影响。研究结果表明,不同类型堵漏材料的协同作用能够有效提高堵漏效果,降低井漏损失。Lost circulation is one of the common downhole complications during drilling operations.At present,the common means of preventing and plugging loss is to seal the lost formation with plugging materials and restore wellbore pressure to ensure normal drilling.Different types of plugging materials have different effects on sealing and pressure-bearing of the lost formation.The effects of the types and combinations of plugging materials on the pressure-bearing effect of the fracture sealing layer and the wellbore pressure recovery effect are investigated through the permeability evaluation test of the sealing layer,the wellbore pressure recovery test,and the fracture sealing simulation evaluation test.The results shows that the synergy of different types of plugging materials can effectively improve the plugging effect and reduce lost circulation losses.

关 键 词：井漏 井筒压力恢复 堵漏材料 封堵层 

分 类 号：TE283[石油与天然气工程—油气井工程]