Anisotropic converted wave amplitude-preserving prestack time migration by the pseudo-offset method;

In the Sugeli gas field,some methods such as seismic relative amplitude preserved processing,geological logging of horizontal wells,the equal-time well test modification and determination of sandstone distribution with identifing technique of single sandstone were used and the sandstone distributing geological mode of He-8 gas resevior of Sugeli gas field was established.

The key of AVO processing is to keep amplitude feature to obtain high fidelity seismic section.

Builds the relation between the three phase symmetrical short circuit current and phase angle,gives the new method of deciding on character for amplitude- phase protec- tion and proposes sure realizable form of amplitude- phase protection.

Preserved-amplitude migration with dual-complexity;