Inclined The Fracturing Perforation Design Research, And

Because of exploration of special oil field, a large number of deviated wells appear. Perforating Completion, one of the main well completion techniques, has been widely used in petroleum industry. However, for fracturing wells, fluid pads and proppant is pumped into formation through perforations, so the communication ability between perforations and formation not only have an important effect on the fluid transportation, fracturing operation and the productivity after fracturing, but also influence the initiation behavior of fracture and production enhancement.In this paper, we begin our studies from open wellbore, and obtain the stress distribution through establishing and solving model, and determine the pressure and direction of initiating fracture. We mend the stress equations of perforated well, then obtain the location and stress of initiating fracture, then we calculate SIFs at multiple parallel cracks tip after using fourier transform and dislocation theory, so we study the effects of some parameters such as perforation, well and formation on fracture initiation, interaction and reorientation and give a number of quantitative and qualitative results. At last, a two dimensional model of fracture reorientation is put forward and compared with three dimensional model. We found that some perforation parameters have obvious effect on fracture initiation and growth. So, these results can be use for guiding perforation design.