摘要
用多档滤波和t0漂移校正的方法，使井下层速度、相对层速度、反射系数等曲线及合成地震记录逐步与地震资料逼近，使之最佳相似后，再逐次提高滤波频率，找出产生薄互层反射波的组界面及组内界面，从而实现钻遇砂层在三维高分辨率地震记录上较准确的界面标定。在此基础上，用对井最佳层速度曲线、相对层速度曲线在波阻抗、道积分剖面上进行对层标定，最后利用校验过的平均速度作测井曲线时深转换，显示出深、时双坐标的地震、测井及地质综合剖面，完成标定全过程。在牛庄洼陷的三维地震剖面及波阻抗剖面上，对17口井钻遇沙三段砂层进行了标定，获良好效果。
A series of seismic techniques is employed to locate interfaces of thin interbedded intervals and those of intra-interval.Thereafter,fine location of surfaces of sands encountered by drilling has been completed on high resolution 3-D seismic data.Upon the basis of the location, the best interval velocity curve of wells and relative interval velocity curve are used to calibrate the sands on acoustic impedance sections.Finally,depth-time conversion of logging curves is conducted with corrected average velocity to display integrated seismic,logging and geologic profiles with depth and time coordinates.The whole process of calibration described above has been applied to No.3 Sha sands of 170 wells in Niuzhuang sag with 3-D seismic data and acoustic impedance sections,which is of satisfactory effects.
出处
《中国海上油气（地质）》
1991年第2期25-32,共8页
China Offshore Oil and Gas(Geology)
