渤中凹陷覆盖型潜山界面卡取过程中地质循环点确认方法  

Confirmation method of geological circulation points during the interface determination of covered buried hills in Bozhong sag

作　　者：温海涛[1] 郭明宇 李战奎[1] 张建斌[1] 苑仁国 管宝滦 WEN Haitao;GUO Mingyu;LI Zhankui;ZHANG Jianbin;YUAN Renguo;GUAN Baoluan(Engineering Technology Branch of CNOOC Ener Tech-Drilling&Production Co.,Tianjin 300452,China;Tianjin Branch of CNOOC(China)Co.,Ltd.,Tianjin 300452,China)

机构地区：[1]中海油能源发展股份有限公司工程技术公司 [2]中海石油(中国)有限公司天津分公司

出　　处：《录井工程》2024年第2期97-102,共6页Mud Logging Engineering

摘　　要：相对渤中凹陷暴露型潜山而言,覆盖型潜山埋藏更深,平均井深超4 200 m,上覆地层岩性更复杂,界面处地层可钻性差别更小,潜山界面卡取过程中地质循环点选取困难,作业时效低。通过对渤中凹陷近年来已钻井潜山界面卡取情况及覆盖型潜山界面处钻井参数变化情况进行统计分析,提出渤中凹陷潜山界面预测误差概率模型,并通过筛选潜山界面卡取的敏感参数,计算参数变化率及权重系数,形成潜山界面卡取综合评价指数,进而建立了渤中凹陷地质循环指数模型。该方法在渤中凹陷覆盖型潜山井作业中应用效果好,作业时效得到明显提升。Compared to the exposed buried hills in Bozhong sag,the covered buried hills are buried deeper with an average well depth of over 4200 m.The lithology of the overlying strata is more complex,and the difference in drillability of the strata at the interface is smaller.It is difficult to select geological circulation points for the buried hill interface determination,and the operating efficiency is low.By conducting statistical analysis on the situations of the buried hill interface determination and the changes in drilling parameters at the covered buried hill interface in the drilled wells of Bozhong sag in recent years,an innovative error probability model of buried hill interface prediction in Bozhong sag was proposed.By screening out the sensitive parameters of buried hill interface determination,calculating the change rate and weight coefficients of the parameters,a comprehensive evaluation index for the buried hill interface determination was formed,and a geological circulation index model for Bozhong sag was established.The application effect of the method is good in the operation of the covered buried hill wells in Bozhong sag.The operating efficiency has been significantly improved.

关 键 词：渤中凹陷 覆盖型潜山 卡潜山 地质循环 数学算法 作业时效 

分 类 号：TE132.1[石油与天然气工程—油气勘探]