老油田浅层声波曲线的预处理与重构技术
摘要
由于测井资料采集时间及使用的测井仪器的不同,我国许多老油田浅层声波时差测井曲线往往存在刻度不统一、测量值不反映实际地层情况、无法区分砂、泥岩等问题,同时因声波测井方法与地震方法的差异,导致地震波阻抗反演结果预测薄层砂体能力的下降。为此,本文总结了一套包括声波井径校正、标准化处理、速度校正的预处理技术,以深侧向电阻率为参考曲线,对预处理声波曲线进行了重构。对港东一区一断块的实际应用结果表明,利用声波曲线预处理后制作的合成记录与井旁道相关性明显提高,预处理曲线重构后反演结果分辨砂、泥岩的能力显著增强,且与钻井结果相吻合。
Due to different acquisition time and different types of logging instrument used in well logging data acquisition,some problems,such as inconsistent calibrations,measured values not reflecting the real conditions for the strata,failing to resolve sand and shale,the difference between acoustic logging method and seismic method and so on exist in the acoustic logging curves for the shallow layers in old oil-fields,the problems above then cause poor results for prediction of thin layer sand bodies by using seismic impedance inversion method.In order to solve the problems a set of pre-processing technique including acoustic caliper correction,standardization processing,and velocity correction was summarized to reconstruct the acoustic logging curves by taking deep lateral resistivity as reference curve.The application results for the reconstructed curves in a block of Gang East area demonstrated that the correlationship between the borehole-side seismic traces and the synthetic records which were made by using reconstructed acoustic logging curves were obviously increased,the ability for the inversion results to resolve sand and shale was greatly raised,which matched the drilling results very well.
Due to different acquisition time and different types of logging instrument used in well logging data acquisition,some problems,such as inconsistent calibrations,measured values not reflecting the real conditions for the strata,failing to resolve sand and shale,the difference between acoustic logging method and seismic method and so on exist in the acoustic logging curves for the shallow layers in old oil-fields,the problems above then cause poor results for prediction of thin layer sand bodies by using seismic impedance inversion method.In order to solve the problems a set of pre-processing technique including acoustic caliper correction,standardization processing,and velocity correction was summarized to reconstruct the acoustic logging curves by taking deep lateral resistivity as reference curve.The application results for the reconstructed curves in a block of Gang East area demonstrated that the correlationship between the borehole-side seismic traces and the synthetic records which were made by using reconstructed acoustic logging curves were obviously increased,the ability for the inversion results to resolve sand and shale was greatly raised,which matched the drilling results very well.
引文
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[2]陈钢花,王永刚.水基泥浆的侵入对声波测井曲线的影响及校正.石油物探,2005,44(6):609～611
[3]朱家俊,张善文,王永诗等.水基钻井液浸泡对浅层声波测井的影响及校正方法.石油勘探与开发,2004,31(2):90～92
[4]莫修文,丁永浩,王宏建.葡西地区油气储层泥质与粘土含量的计算方法研究.吉林大学学报(地球科学版),2006,36(专辑):139～142
[5]高树芳,范玲,梁晓宇等.测井曲线标准化方法及其对测井解释结果的影响.国外测井技术,2008,23(2):17～21
[6]谭德辉,王燕,陈鸿雁.鄂尔多斯盆地东部榆林地区测井资料标准化研究.国外测井技术,2007,22(2):10～13
[7]戴启德,纪友亮.油气储层地质学.山东东营:中国石油大学出版社,1996,138～143
[8]张学芳,董月昌,慎国强等,曲线重构技术在测井约束反演中的应用.石油勘探与开发,2005,32(3):70～72
[9]刘淑华,张宗和,刘建武等,声波曲线重构反演技术在储层预测中的应用.天然气工业,2007,27(增刊A):394～396
[10]杨少虎,黄玉生,彭文绪等,声波重构技术在储层反演中的应用.石油地球物理勘探,2006,41(2):171～176
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