岩屑迟到时间分井段计算校正法在渤海X构造的应用  

Application of well section division calculation method correcting cutting lagging time in Bohai X structure

作　　者：王建立 管宝滦 苑仁国 李战奎[2] 

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

出　　处：《录井工程》2015年第3期24-26,105,共3页Mud Logging Engineering

摘　　要：在相同尺寸井眼中利用井径扩大率校正岩屑迟到时间时,由于不同类型的钻井液所造成的井径扩大率不同这一因素易被忽略,导致校正后的迟到时间不够准确。为了解决该问题,综合以往实践经验,在计算理论迟到时间的基础上,以渤海X构造9口井测井井径数据分析为依据,引入"分井段计算法",即按照井径扩大率的不同进行分段,将井径扩大率相近的井段作为一段,独立计算各井段迟到时间,最后将各井段迟到时间相加得到总的校正迟到时间。应用该方法对渤海X构造3口井进行了迟到时间校正,可将迟到井深(录井深度)与测井深度间的误差减小到1m以内,较好地解决了岩屑迟到时间不准确的问题。"分井段计算法"校正后得出的迟到时间比传统理论方法的计算结果更为准确,对提高地质录井质量具有重要的意义。While using well diameter enlargement ratio in the same size well corrects cutting lagging time,the factor that different types of drilling fluid may cause different well diameter enlargement ratio is easy to be ignored,therefor,the corrected lagging time may not be accurate enough.In order to solve this problem,summarizing the past practical experience,on the basis of calculating the theoretical lagging time,taking the well logging caliper data of 9wells in Bohai X structure as the analysis basis,introducing well section division calculation method,that is,the well sections are divided in accordance with well diameter enlargement ratio,the well sections with the similar well diameter enlargement ratio are divided into one section,lagging time for each well section is independently calculated,finally,the lagging time of each well section is summed up and the total correction lagging time is obtained.Using this method,the lagging time of 3wells in Bohai X structure were corrected,they can reduce the error between lagging well depth(mud logging depth)and well logging depth to less than 1mand solve the problem of the inaccurate cutting lagging time.The correction lagging time with well section division calculation method is more accurate than the results with the traditional theoretical method,the method is important to improve the quality of geological logging.

关 键 词：迟到时间 分井段计算法 井径 钻井液 井径扩大率 

分 类 号：TE132.1[石油与天然气工程—油气勘探]