The superpressure or lost pressure is happend in the areas where high and steep structure undulates intensely when the formation water in Carboniferous of east Sichuan is of density contrast.
However, because of the complicated subsurface and surface conditions, comprehensive researches must be strengthened, focusing on mountainous seismic survey, interpretation of high-steep structure and subsalt structure, and new techniques needed for settling the influence of geostress on drilling and the drilling of huge salt and gypsum layers.
This paper briefly introduces the typical high-steep structure of China and describes the structure and the energy converting method and characteristics of the turbodrill self developed.
The furnished examples and practical application of the method in many areas show that the method can improve the precision of velocity field and structure mapping, resolve structure mapping problems by variable-velocity on steep dip structure and low-relief structure in front of a mountain.
The superpressure or lost pressure is happend in the areas where high and steep structure undulates intensely when the formation water in Carboniferous of east Sichuan is of density contrast.
This paper adopts the migration method of phase shift interpolation based on velocity model. The results of theory model and practice data processing indicate that the method improves precision and efficiency of images for the complex wave field with high steep structure.