以水平井感应测井资料为基础,根据Maxwell方程,从感应测井原理入手,建立感应测井三维数值模拟正演算法,引入阻尼因子,形成马奎特反演算法,利用交互式正反演方法,确定水平井井眼轨迹和地层相互关系,从而达到利用水平井感应测井曲线进行砂体顶界面反演目的.正演模拟表明:水平井中双感应能够反应的界面距离为2m;且地层界面上下地层电阻率数值相差越大,双感应测井对地层界面信息反映越灵敏;当仪器所处地层电阻率比围岩高,则双感应能够反映的地层界面越远.利用水平井双感应测井资料采样交互式正反演该校正后的构造界面符合生产情况,弥补了由于地震分辨率不足造成构造界面误差,为油藏精细地质建模提供较为准确的砂体顶界面.%This paper uses induction logging data to establish a 3D numerical simulation forward algorithm. Based on Maxwell's equations,the Marquette inversion algorithm can be built by introducing a damping factor. Based on the interactive forward and inversion approach,the correlation of horizontal well trajectory and strata can be determined. Forward modeling results show that the induction logging data can respond to interface distance as small as 2 m in horizontal wells. Thus,the purpose to determine the top and bottom interface of sand body by using induction resistivity of horizontal well can be achieved. The structure interface map calibrated using this method is consistent with the field observation, which suggests the new method can provide an accurate estimate of the top and bottom interfaces of the sand body in complementary to seismic data.
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