综合录井深度归位误差成因及校正方法  

Error causes for mud logging depth and method restoring to its proper location

作　　者：高志 

机构地区：[1]大庆钻探地质录井一公司

出　　处：《录井工程》2013年第1期9-13,85,共5页Mud Logging Engineering

摘　　要：深度作为录井的最基本参数,在钻井勘探中具有十分重要的作用,一旦录取失准,其他录井参数都将失去意义。在综合录井资料的解释应用过程中,常发现气测数据和岩屑、岩心剖面需要上提或下放(即深度归位)才能更好地与其他相关信息吻合,这给录井资料的准确解释和应用带来一定困难。根据在松辽盆地垂直井施工现场工作多年所收集整理的大量资料和总结的经验,重点针对垂直井进行攻关,参考相关文献并以松辽盆地北部的现场施工作业为基础,确定气测数据深度归位误差主要源于钻具受力和温度两个因素作用下发生的形变,导致实测井深与实钻井井深存在误差。为了校正这种误差,确定了垂直井井下钻具形变系数的计算方法,得出了校正公式,经现场应用可知,较好地解决了录井深度归位误差问题。As a basic mud logging parameter, depth plays an important role in drilling exploration.Once the data is inaccurate, the other parameters will be meaningless. During the process of mud logging data interpretation and application, only in the way of restoring gas logging data, cutting and core profiles to the proper locations can they tally with the other relevant information, thus bringing some difficulties to the accurate interpretation and application of mud logging data. In order to find the main causes of depth errors, the bases of restoring depth to proper location were studied. In accordance with the large amount of the collected data and summarized experience, referring to the relevant articles, based on the actual on-site construction jobs in northern Songliao Basin, the main causes of gas logging depth errors were determined,that is, the forces on the drilling tool and temperature are two important factors to the deformation of downhole drilling tool, they result in errors between the measured depth and the real drilling depth. Through field application verification, the calculation method of deformation coefficient was determined for downhole drilling tool in vertical wells, the correction formula was got, thus decreasing the errors in gas logging depth

关 键 词：综合录井 垂直井 井深 解释应用 深度归位 误差成因 校正方法 形变系数 

分 类 号：TE132.13[石油与天然气工程—油气勘探]