水基钻井液浸泡对浅层声波测井的影响及校正方法
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摘要
采用水基钻井液时 ,浅层声波时差测井受井眼垮塌及泥岩蚀变的影响严重 ,而采用油基钻井液能获得原状地层的声波时差。分析胜利油区水基钻井液和油基钻井液条件下馆陶组声波时差变化与岩性的对应关系 ,建立了声波测井环境校正方程。 40余口井用该方法校正声波测井资料 ,用校正后资料做的合成地震记录与井旁实际地震道的相位、能量的对应关系良好。图 5参 3
The acoustic logging data could be extremely affected by borehole slump and mudstone alteration during the using of water-base mud. The use of oil-base mud would have the real information of the formation. The analysis of correlation relationship between the lithological characters and change of velocity could be used to establish a correction equation of logging. The equation has been used for over 40 wells in Shengli Oilfield, the corrected information shows a good relationship between the compound seismic record and the practical seismic information of nearby the well.
引文
[1] 曾文冲.油气藏储层测井评价技术[M].北京:石油工业出版社,1991.10.
    [2] 孙建孟,王永刚.地球物理资料综合应用[M].东营:石油大学出版社,2001.9.
    [3] 张金峰,董承强,张明振.孤东地区浅层声波曲线分析与校正[J].油气地质与采收率,2002,9(2),5657.

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