Prospecting defect analysis and improving technology for velocity modeling in high-steep structure area:case study of Yan an10 well.;

Aiming to the difficulties of identifying high-steep structures and easily causing reservoir damage in the development of low-permeability oil reservoir,the comprehensive research of reservoir and geology are carried out.

As the key oil & gas prospect area,it is found that there exit Manhuduang and Patolon overthrust belt in Block D by re-processing and interpreting old seismic data,the hanging wall is the high-steep structure and the footwall blind trap.

Antileakage and loss circulation control of extra feature/vugular absorption well in carbonate rock of high and steep structures in eastern Sichuan are an important research project.

In view of the characteristics of the high and steep structures in eastern Sichuan region, such as high dip angle, many faults, deep buried pays, hard rocks and extreme difficulty in drilling, etc.

Seismic imaging in Northeast Sichuan is greatly influenced by the widely distributional carbonate,strata juxtaposition with swelling and concaving,superimposition and connection between different wave fields,complex interlayer contact conditions,static corrections,high and steep structure,as well as rapid change of seismic velocity in the area.

Geological configuration in east Sichuan area is belong to high and steep structures.

Aimed at the geologic and drilling charac- teristics of high and steep structures in east Sichuan, the view of comprehensively stopping lost circula- tion is raised in this paper.

Analysis of trap factor distortions in seismic survey in areas with steep dip structures.;

In this region, there are ten rows of high and steep structural zones.