ZQ2井实测迟到时间异常原因分析及修正措施  

Cause Analysis of Abnormal Measured Lag Time in Well ZQ2 and Corrective Measures

作　　者：魏保卫 周鹏遥 王景辰 马腾飞 魏建华 Wei Baowei;Zhou Pengyao;Wang Jingchen;Ma Tengfei;Wei Jianhua(Safety,Environmental Protection and Engineering Supervision Center,PetroChina Tarim Oilfield Company,Korla,Xinjiang 841000,China)

机构地区：[1]中国石油塔里木油田分公司安全环保与工程监督中心,新疆库尔勒841000

出　　处：《石油工业技术监督》2021年第10期50-53,共4页Technology Supervision in Petroleum Industry

摘　　要：迟到时间是钻井过程中的一项重要工程参数,在钻探过程中发挥着十分重要的作用。录井过程中通常采用理论迟到时间结合实测迟到时间校正的方式进行岩屑与气测录井。通常,理论迟到时间与实测偏差较小,但在ZQ区块的一口预探井正常钻进过程中却遇到了实测迟到时间异常提前的现象。现场根据实钻情况,分析实测迟到时间异常产生的原因,建立针对该井实际迟到时间的修正式,计算实际迟到时间。通过计算得到的修正迟到时间,结合特殊岩性迟到时间校正,现场进行岩屑捞取,取得了良好效果。Lag time is an important engineering parameter in drilling process and plays an important role in drilling process.Cuttings logging and gas logging are usually performed by combing theoretical lag time with measured lag time.Generally,the deviation between the theoretical lag time and the measured lag time is small,but the measured lag time is abnormally early in the normal drilling process of a pre-exploration well in ZQ block.According to actual drilling conditions,the causes of abnormal measured lag time are carefully analyzed on site,and a correction formula for actual lag time of the well is established,and the actual lag time can be obtained by calculation.By correcting the calculated lag time and combining the correction of special lithological lag time,the cuttings are retrieved on site and a good result is obtained.

关 键 词：迟到时间 实测 修正 岩屑录井 

分 类 号：TE21[石油与天然气工程—油气井工程]