基于迟到时间的气测曲线形态异常校正方法  

Correction of abnormal gas logging curve shapes based on lag time

作　　者：么春雨 张建斌 苑仁国 魏雪莲 YAO Chunyu;ZHANG Jianbin;YUAN Renguo;WEI Xuelian(CNOOC Ener Tech-Drilling & Production Co., Tianjin 300459, China)

机构地区：[1]中海油能源发展股份有限公司工程技术分公司,天津市300459

出　　处：《录井工程》2021年第2期35-38,共4页Mud Logging Engineering

摘　　要：录井作业过程中,在岩性剖面图上经常遇到气测曲线与储集层深度位置错位的现象。当储集层与其上下地层的钻时不同时,错位的同时也会引发气测曲线变形,对利用气测录井评价储集层含油丰度带来很大影响。产生深度库气测曲线形态异常的根本原因是录井设置的迟到时间与实际情况不符。通过对时间库气测曲线和迟到深度的研究,找出了时间库“储层气”“循环气”气测曲线类型与迟到深度的特殊对应关系,据此建立了时间库迟到深度标尺平移法,不但可以校正迟到时间,同时可以对深度库气测曲线形态的异常进行校正。该方法已在渤海油田实际应用中取得了良好效果。In the process of drilling,the dislocation of gas logging curve and reservoir depth is often encountered in lithological profile.When the ROP of the reservoir is different from that of the upper and lower strata,the dislocation will also lead to gas logging curve deformation,which will have a great impact on the evaluation of oil bearing abundance by gas logging.The basic reason for the abnormal shape of the gas logging curve in the depth database is that the lag time of mud logging setting is inconsistent with the actual situation.Through the study of gas logging curves and lag depths in time database,the special corresponding relationship between gas logging curve types of reservoir gas and circulating gas and lag depths is found.Based on this,the depth scale translation method of the time database is established,which can not only correct the lag time,but also correct the abnormality of the gas logging curve shapes in the depth database.This method has been applied in Bohai Oilfield and achieved good results.

关 键 词：迟到时间 气测曲线 时间数据库 深度数据库 校正 岩性剖面 

分 类 号：TE132.1[石油与天然气工程—油气勘探]