Reverse-Time Migration Imaging for Cross-Deviated Well Seismic Reflected Wave and Its Application

Both vertical well seismic imaging and deviated well seismic imaging are needed in oilfield development.At the same time,it is not possible for us to obtain detailed reservoirs and interlayers with high resolution when only surface seismic data are used.In this research,we investigated cross well staggered-grid finite-difference reverse-time migration algorithm and absorbing boundary conditions.In the end,we obtained reverse-time migration image from the theory model and field seismic data.The result shows that the migration algorithm is correct,and the signal-to-noise ratio and resolution ratio of reverse-time migration imaging profile are higher than that of surface seismic imaging profile.What is more,for the reverse-time imaging profile,the details of layers are clearer,and it coincides well with the actual strata,which makes it much more credible.This means we can use the above method to get detailed reservoirs and interlayers with high resolution.