摘要
井漏是影响钻井作业最大的风险之一,预防井漏一直是钻井作业不断探索的工作。评价井漏的方式是评价地层漏失通道和漏失空间,即井漏地质风险。建立准确评价地层井漏地质风险的方法,对于指导现场钻井安全工作具有非常重要的意义。由于井漏地质风险自身的不确定性,只能进行定性评价,为使井漏地质风险评价更客观、更具体,实现定量评价,以渤海X油田为例,通过分析发生过漏失井的资料,提出了模糊数学和层次分析相结合定量判断井漏风险的评价方法,实现了钻前井漏地质风险定性、定量评价。基于模糊数学层次分析方法计算得出井漏地质风险值,建立漏失排量与风险值关系模型,依据计算的风险值,将井漏风险定量划分为高风险、中风险、低风险3个级别,可为井漏风险井的分类提供重要依据。
Leakage is one of the biggest risk to be always prevented in the constant exploration of drilling operations.The approach to evaluate well leakage is to evaluate the geological risk of the formation channel loss and space loss.Establishing a method of accurately evaluating the geological risk of the formation loss is of important significance for guiding the safety work of the field drilling.The geological risk of well loss itself is an uncertain concept,which can only be evaluated qualitatively.In order to make the evaluation of well loss geological risk more objective and specific,and realize quantitative evaluation,the author takes Bohai X Oilfield as an example,analyzes the data of wells that have experienced losses,and puts forward the method of quantitative judgment of well loss risk by combining fuzzy mathematics and hierarchical analysis.Finally,the quantitative and qualitative evaluation of geological risk of well loss before drilling is realized.The fuzzy hierarchical analysis method is used to calculate the geological risk value of the well loss,and the relationship model between the leakage rate and the risk value is established.According to the calculated risk value,the well loss risk is quantitatively divided into three levels:high risk,medium risk and low risk,which can provide an important basis for the classification of the well with the risk of loss.
作者
邓津辉
刘广明
谭忠健
DENG Jinhui;LIU Guangming;TAN Zhongjian(CNOOC(China)Co.,Ltd.,Tianjin Branch,Tianjin 300459,China;CNOOC Ener Tech-Drilling&Production Co.,Tianjin 300452,China)
出处
《录井工程》
2023年第1期40-46,共7页
Mud Logging Engineering
关键词
模糊数学
层次分析方法
井漏
地质风险
定量化评价
fuzzy mathematics
analytic hierarchy process
leakage
geological risk
quantitative evaluation
作者简介
邓津辉,高级工程师,1976年生,2002年硕士毕业于中国科学院兰州地质研究所,现主要从事油气勘探地质研究工作。通信地址:300459天津市滨海新区海川路2121号渤海石油管理局C座。电话:(022)66502287。E⁃mail:dengjh@cnooc.com.cn。
