Seismic exploration techniques are the bottleneck of hydrocarbon exploration in the complex foothill structural belt.The
complex surface and underground geologic conditions bring great challenge for seismic exploration,which mainly displays low
S/N of seismic data,large variation in lateral velocity is not suitable to utilize seismic imaging methods,and the complicated
underground structures in piedmont zone are difficult to interpret.In order to solve the problems for the seismic exploration in
foothill area,we proposed some strategies:①deepening the understanding of complicated wavefield from piedmont
zone;②model based designing geometry such as wideline large array 2D,wide-azimuth high-fold 3D;③to further improve
shooting and receiving effects;④probing de-noising methods for the particular noise (scattering wave and non-longitude non-
linear coherent noise,et al) existing in foothill area;⑤jointly applying multi-methods to improve static correction
effect;⑥studying and applying reverse time migration,and focusing on velocity model building technique for low S/N seismic
data;⑦prospectively studying new techniques including undulating surface anisotropy reverse time migration and full
waveform inversion and so on.Meanwhile,we suggest carrying out strict QC during the whole seismic acquisition,processing and
interpretation,constantly improving the application result of single technique,continuously optimize the application workflow of
the seismic techniques,emphasis on the integration of seismic technology,and improve the seismic exploration effect by
integrated geophysical prospecting means with the guidance of geology.
论文详情