摘要
车斜577井下部地层地质构造复杂,沙河街组层理、孔隙及微细裂缝发育,施工中井壁坍塌严重;三开井眼小,地层压力系数低,施工中易发生井漏等复杂情况;井底温度高达180℃,高温下钻井液体系流变性控制较难。为此,分析钻井液技术难点,通过使用复合盐防塌钻井液体系和抗高温无固相钻井液体系,配合相应的钻井液体系维护处理工艺,解决了下部地层的井壁失稳难题,为区块的后续勘探开发提供了技术支持。
The geological structure of the lower part of the Chexie 577 well is complex,with developed bedding planes,pores,and micro cracks in the Shahejie Formation.The wellbore collapsed severely during construction;The three well openings are small,the formation pressure coefficient is low,and complex situations such as well leakage are prone to occur during construction;The temperature at the bottom of the well can reach up to 180℃,making it difficult to control the rheological properties of the drilling fluid system at high temperatures.To this end,the technical difficulties of drilling fluid were analyzed.By using composite salt anti collapse drilling fluid system and high-temperature resistant solid-free drilling fluid system,combined with corresponding drilling fluid system maintenance and treatment processes,the problem of wellbore instability in the lower strata was solved,providing technical support for the subsequent exploration and development of the block.
作者
李彦操
周建民
周晓轩
刘霞继
杨倩云
邱春阳
LI Yancao;ZHOU Jianmin;ZHOU Xiaoxuan;LIU Xiaji;YANG Qianyun;QIU Chunyang(Engineering Technology Management Center,Sinopec Shengli Oilfield Company,Dongying 257001,Shandong,China;Bohai drilling second corporation,Shengli Petroleum Engineering Corporation Limited of SINOPEC,Dongying 257200,Shandong,China;Drilling Fluid Tech-Service Center,Shengli Petroleum Engineering Co.,Ltd.SINOPEC,Dongying 257078,Shandong,China)
出处
《四川化工》
CAS
2024年第3期24-27,共4页
Sichuan Chemical Industry
关键词
车斜577井
防塌
技术难点
钻井液配方
施工工艺
Chexie 577 well
anti collapse
technical difficulties
drilling fluid formula
construction technology
