利用偶极横波成像测井资料评价地层的各向异性

偶极子横波测井仪接收器为一四极子接收源，即可视为方向互相垂直的两个偶极子接收器，当垂直分量信号的振幅式能量为0或最小时，平行分量信号反映地层快、慢横波的传播特征。四分量旋转变换法利用该物理对偶极波成像测井（DSI）记录的偶极横波资料进行处理，在各向异性的地层中，通过分离出的快、慢横波的时差和波至时间、，计算出地层各向异性系数，评价地层各向异性。实际资料处理结果表明快、慢横波的时差和到达时间可有效显示地层的各向异性。

Evaluating the Reservoir Anisotropy by Utilizing DSI Log Data

Receiver in DSI tool is a four pole receiving source regarded as two dipole receivers perpendicular to each other When the amplitude energy of vertical components is zero or minimum parallel components determine the propagation behavior of fast/slow shear wave Four component cyclic transformation is used in processing dipole shear wave data from DSI logging and through the separated interval transit time and arrival time of fast/slow shear wave in anisotropic formation and anisotropic coefficients of a reservoir are calculated to evaluate the reservoir anisotropy Actual processing shows that the anisotropy is displayed by interval transit time and arrival time.