Study of Seismic Data Velocity and Mapping Method in Complicated Structure Area and Its Application
By
Cai Gang1, Qu Zhiyi1
(1) Geophysical Engineer, LanZhou, GanSu Province, China
At present, seismic data interpretation, velocity analysis, time-depth
conversions usually are completed on one interpretative software. As we know,
every interpretative software application has its advantages and disadvantages.
Only using one kind of interpretative software in complicated structure area
can't meet the needs of each work assignment. We analyze the advantages and
disadvantages of two mapping modules CPS-3 and Z-Map Plus in GeoQuest and
Landmark respectively. The functions of the velocity analysis module InDepth
have been perfected and data transmission between CPS-3 and Z-Map Plus was
achieved. With in a complicated structure area of inconsistent datum plane
between seismic section and velocity spectrum, a new method of time-
depth
conversion has been used to make the structural map. A 3D velocity field of high
accuracy is found and time-
depth
conversion is completed on a datum plane of
velocity spectrum to make the structural map by combining CPS-3 and Z-MAP Plus.
Three dimensions visual software
Earth
Vision is applied to display final
structural map. This method was applied and achieved success in the C area.