Aiming at this issue,this paper proposes a method which based on generalized cylinder and linear interpolation.

The author obtains main results as follows: (1) Based on Ding and Helleseth s generalized cyclotomy,new generalized cyclotomic sequences of order .

A 3D geological model set up base on the generalized Tri-prism.

This method takes generalized tri-prism(GTP) as primitive modeling element,realizes inference and automatic modeling of geological structure including faults according to characteristics of borehole data and the knowledge inference rule,which can avoid unnecessary manual intervention,extend applicable range and expressing capability of 3D geological modeling.