关键词: 射孔深度, 地应力, 射孔初始方位角, 最佳应力系数, 最差应力系数

Abstract: Presently,there is no concept of perforating azimuth angle in perforating design and perforating practice. But,perforating depth of shot will decrease along with increase of intensity and density of stratum,furthermore,stratum resistance to shot will increase following as increasing of intensity and density of rock according as theory of shock wave. At same times,as we know, distributing of stress of stratum around wall of a well is difference due to difference of magnitude and direction of tectonic stress. So,we can educe that perforating azimuth angle has an import effect on actual perforating depth of shot. The author primarily probe into choosing of optimal-perforating-azimuth angle in the light of distributing status of stress around well in perforating depth,define the best stress coefficient and worst stress coefficient.

Key words: perforating depth, stress of stratum, perforating azimuth angle, best stress coefficient, worst stress coefficient