Research on 3-D VSP geometry design for deviated well.;

Research and application of systematic lift techology for screw pump in deviated well;

Research and application of an optimized design of pumping system used in deviated wells;

Method for making an inclined well synthetic seismogram.;

The research for the special inclined well construction technology through deposit;

Research on borehole deviation in drilling anisotropy formations;

Effects of stress field in bottom hole on borehole deviation during gas drilling

Factors of affecting borehole deviation for air drilling and the technical application

Causes of well deviation during gas drilling and its control

But well deviation of air drilling is a problem in some place where drilling has no problem with mud.

The formation mainly consists of dolomite and features in complex lithology, which makes it difficult to control well deviation.

But the research on borehole deviation control is very few.

This paper briefly mentions the necessity for the development of hole deviation treatment and mapping programs,and details in program structure,processing procedures,their major functions and data format.

Hole deviation is the main technical bottleneck in gas drilling because the negative pressures at the bottom of the hole reduces the apparent strengths of the rocks penetrated,thus in being beneficial to the increase of ROP,on the other hand,a high well angle is easy to be generated in a short time.