Description of high-pressure compressed stratum form

The thesis deals with all possible factors that influence high-pressure gravel packing from the angle of rock features of loose sandstone and construction technology. And then numerically simulate given naked eye wells and perforated wells by means of finite element analysis software. The simulations suggest that perforation along the direction of maximum principal stress helps occurrence of the cracks. Cracking mechanism of the loose sandstone in the course of high-pressure packing is also discussed on the basis of numerical simulation, with conclusion that bursting pressure of the compacted sand layer is the crack initiation pressure of high-pressure gravel packing, and its crack form directly influences that round the well.