摘要
地震体的时深转换是利用地震资料进行构造及储层解释的一个非常关键的环节,而常规时深转换方法精度较低,一定程度上影响了勘探井位布置及开发方案的制定。采用时深一体化网格方法,即顶底界面以多井合成记录标定求取的平面时深关系为准,顶底之间利用时间域和深度域网格一一对应关系进行"物理"搬运的方法,从而减小转换前后的累计误差,使地震体及地震反演体时深转换前后的波形与砂体形态保持一致。利用该方法将喇嘛甸油田北部区块反演结果转换到深度域,精细刻画了断层附近砂体的分布特征,指导了L213等3口水平井的部署,砂体预测准确率达到98%以上,年增油17 000t,展现了新的时深转换方法的精度及可靠性。
Time-depth conversion of seismic body is a key point in seismic structural interpretation and reservoir prediction.Because of the conventional time-depth conversion is with low-precision,it has partly influenced the well-location arrangement and exploration scheme.The time-depth integration grid method,i.e.the top and bottom surface horizon time-depth relation was based on multi-well synthetics seismogram calibration,is proposed,after this method had carried out,the accumulative conversion errors can be reduced by the physical transportation of one to one correspondence on the time domain anddepth domain meshes between the top and bottom,thus the waveforms and sand body features of seismic body and inversion body can be kept consistent.Using this method,the inversion results of northern Lamadian oilfield were transformed into depth domain,the distribution characters of sand body near fault were fine depicted,three horizontal wells,such as L213,were deployed.The results show that the prediction accuracy for the sand body is up to 98%,oil increment is more than 17 000 tons per year,and the accuracy and reliability of new time-depth conversion methods are well showed.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2014年第5期1712-1719,共8页
Journal of Jilin University：Earth Science Edition
基金
国家"973"计划项目(2009CB219307)
国家"十二.五"重大专项课题(2011ZX05010-001)
关键词
高精度
时深转换
地震
mesh model
time-depth conversion
seismic
