Velocity Tomography of Petroleum by P and S Seismic Waves

This paper study simulates artificial surface seismic record of multiple-shot on the base of “uniform-layer multi-medium model”(as shown in Figure 10).The observation method is:three shot positions at 1 500 m,2 500 m,3 500 m;road distance 25 m,140 road(or road distance 5 m,700 road),offset 1 000 m.Combining the method of "P and S seismic wave's velocity tomography of minimum travel time" with "P and S seismic waves velocity tomography of wave fundamental solution" to invert the interface shape and the velocity of P and S seismic wave of each layer.With the principle of "The simpler the better", we only put three shots to the "multi-medium model", then using the "minimization of travel time" and "boundary conditions" to replace the conventional multi-shots,so we can reduce the computation greatly.After then,supposing the shot and receiver points are known,we programming to compute the reflected wave's travel time from the shot points to receiver points.We developed the content of CT,and explored one-dimensional fundamental solution's important role in expressing the field intensity,which could highlight the characteristics of our work.Finally,analyzing the actual seismic data with "Pro MAX software" to revise the process above,then getting the vertical sectional drawing of 11 ground floors and also the result of petroleum P and S seismic wave's velocity tomography.