【摘要】 利用钻、测井资料对地震层位进行标定,或者确定地震层位的深度,以及将地震等t0图转换成深度构造图,均需要进行时深转换。时深转换的精度取决于速度的精度。通常使用H-T函数法、井间简单数学插值法和DMO速度场法,获取时深转换的速度场,但是由此获得的速度精度均不能满足工作的需要。本文基于射线追踪的CMP相干速度反演技术获取的速度场,在渤海油田JZ251地区取得了成功。CMP相干反演的速度误差分析表明,此类误差是一种全区比较稳定的误差,可以通过相应的校正得到消除。更多还原

【Abstract】 The time to depth conversion is needed when using drilling data and well logging data to calibrate seismic horizons,to determine the depth of the horizons and to convert seismic t0 contour maps to structure maps in depth.The accuracy of the time to depth conversion depends on the accuracy of the velocity.The velocity field for time to depth conversion is usually acquired by using the H-T function method,inter-well mathematical interpolation method and DMO velocity field method,but the accuracy of the velocity field acquired by the three methods can not meet the need of E&P tasks.It was shown in this paper that the velocity field which was based on ray tracing CMP coherent velocity inversion technique was successfully applied in JZ251 area in Bohai Oil-field.The CMP coherent inversion velocity error analysis indicates that the error is a stable and global error and it can be removed by corresponding correction.更多还原