钻井解卡用隔离液的室内评价与应用  

Laboratory Evaluation and Application of Isolation Fluid for Drilling Unfreezing

作　　者：张松 漆伟 郑建昆[1] 陈兴明 陈云富 ZHANG Song;QI Wei;ZHENG Jiankun;CHEN Xinming;CHEN Yunfu(CCDC Drilling Fluid Technical Services Co.,Ltd.,Chengdu 610051,China;CNOOC Oilfield Chemical Division,Langfang 065200,China;CCDC Geological Exploration&Development Research Institute,Chengdu 610051,China)

机构地区：[1]川庆钻探工程有限公司钻井液技术服务公司,四川成都610051 [2]中海油服油田化学事业部,河北廊坊065200 [3]川庆钻探工程有限公司地质勘探开发研究院,四川成都610051

出　　处：《化工管理》2025年第6期144-147,共4页Chemical Management

摘　　要：随着四川蓬莱气区勘探目的层的深度增加,和高石梯-磨溪构造相比,井身结构增大一级,钻具环空间隙大,钻井液密度高,井底压差增大。若发生卡钻后,这些原因导致使用解卡液过程中环空混窜严重,解卡液性能下降,进而解卡作业失败。在油基解卡液成熟体系的基础上,经过室内处理剂优选评价实验形成的隔离液体系不仅性价比高,有效减少混窜,还保证了解卡效果,提高了解卡成功率。隔离液结合“解卡液-酸液”体系在W204H96井成功应用后,仅4小时解除了卡钻故障。As the depth of the exploration target layer in Penglai gas field,Sichuan increases,compared with the Gaoshiti-Moxi structure,the wellbore structure increases by one level,and the annular space gap of the drilling tool is larger;the high density of drilling fluid increases the pressure difference at the bottom of the well.If there is a stuck drill,these reasons can lead to severe air circulation during the use of the unfreezing fluid,resulting in a decrease in the performance of the unfreezing fluid and ultimately the failure of the unfreezing operation.On the basis of the mature system of oil-based unfreezing fluid,the isolation fluid system formed through indoor treatment agent optimization evaluation experiments not only has high cost-effectiveness and effectively reduces mixing,but also ensures the card removal effect and improves the success rate of card removal.After the successful application of the isolation fluid combined with the“unfreezing fluid-acid solution”system in well W204H96,the stuck drilling was resolved in only 4 hours.

关 键 词：油基 隔离液 卡钻 

分 类 号：TE24[石油与天然气工程—油气井工程]