摘要
井漏是钻井工程中普遍存在的井下复杂问题,严重影响着钻井施工安全与钻井周期,井漏特征精细识别是高效治理井漏的关键。首先,综合测井、钻井、录井及地质等资料,结合漏层力学性质与物理机理分析,利用加权系数法,建立了基于“井漏综合指数”的井漏层位识别新方法。然后,研究了漏失通道类型及尺寸、漏失压差、漏失速度等井漏特征参数的定量分析方法,并给出计算模型,形成了多信息融合的井漏特征精细识别方法。该方法在X区块进行了实例分析,分析结果表明,X区块实际井资料的处理结果与现场实际漏失地层的层位、漏失类型及漏失速度等井漏特征基本吻合。井漏特征精细识别方法综合考虑了井漏的主要影响因素,利用其可以准确识别漏层的特征,为防漏堵漏技术优化及施工提供科学依据。
Lost circulation is a common downhole complex problem in drilling engineering,which severely affects the safety of drilling operation and drilling cycle.Fine identification of lost circulation characteristics is the key to effectively control lost circulation.Firstly,a new method of lost circulation zone identification based on the“ comprehensive lost circulation index” was established by integrating logging,drilling,and geological data,analyzing the mechanical properties and physical mechanisms of the lost circulation zone,and using the weighting coefficient method.Then,the quantitative analysis method of the lost circulation characteristic parameters,such as the type and size of the lost circulation channel,leakage pressure difference,and lost circulation velocity were studied,and the calculation models were given,forming a new technology of lost circulation characteristic identification with multiinformation fusion.The example analysis results showed that the processing results of actual well data in block X were basically consistent with the lost circulation characteristics of the actual lost circulation formation,such as the lost circulation zone,lost circulation type,and lost circulation velocity.The fine identification method of lost circulation characteristics comprehensively considers the main influencing factors of lost circulation,and can accurately identify the characteristics of the leakage layer,providing scientific guidance for the optimization and operation of leakage prevention and plugging technologies.
作者
陈钢花
何宇龙
邱正松
关键
王晓军
CHEN Ganghua;HE Yulong;QIU Zhengsong;GUAN Jian;WANG Xiaojun(School of Geosciences,China University of Petroleum(East China),Qingdao,Shandong,266580,China;School of Petroleum Engineering,China University of Petroleum(East China),Qingdao,Shandong,266580,China;CNPC Greatwall Drilling Company,Panjin,Liaoning,124010,China;Hainan Branch,CNOOC(China)Co.,Ltd,Haikou,Hainan,570100,China)
出处
《石油钻探技术》
CAS
CSCD
北大核心
2024年第1期26-31,共6页
Petroleum Drilling Techniques
基金
国家自然科学基金项目“裂缝地层致密承压封堵机理与温敏智能堵漏新方法研究”(编号:51974354)资助。
关键词
井漏
特征识别
加权系数法
井漏综合指数
漏失压差
lost circulation
identification of characteristics
weighted coefficient method
comprehensive lost circulation index
leakage pressure difference
