Horizontal Well Fracturing Simulation Model And Software Development

Due to the horizontal wells with the virtue of the larger drainable area, single well yield quantity, so it is an important means to exploit the low permeability oil reservoir, to enhance the production and ultimate recovery. Sometimes due to the low permeability, large seepage resistance, low connectivity in the low permeability reservoir, the production of the horizontal well is still low. It dose not satisfy the economical exploitation demand. Therefore, it is necessary to frac horizontal well to enhance the production. As far yet, the vertical frac technology has already mature, but because of the horizontal well bore configuration more complexity than that of the vertical well, so to frac the horizontal well can not copy the vertical well frac technology. And now the basical theoretical model could not fully fill with the horizontal well frac, which make the horizontal well frac success ratio is very low and the venture is high. The thesis research try to solve the frac horizontal well partly difficulty, in order to improve the frac horizontal well theology optimum design, and finally improve the frac horizontal well effects and success ratioTherefore the thesis research would impetus the development of the basical frac theory and guild the site operation. Based on the frac horizontal well technology need, the paper accomplishes the main contents as followed:(1) According to the electrodynamics'theory, founded a suit of barefoot competition and perforated gun-perforated completion horizontal well around stress distributing math model; and also fracture mechanics theory's extension fracture criterion, and get the horizontal well fracture initional fracture pressure and extension angle math model. According to the example calculation and results analysis, and reach the conclusion that the initional fracture pressure and extension angle with the in-situ stress,fluid filtration and gun-perforation. And research the different stratum condition initional fracture pressure, and combine the hydraulic fracturing operation greatly good.(2) Based on the conversation of energy, and found the fracture horizontal well temperature numerical algorithm, and use "shooting method "to solve it; For fracture temperature,the thesis combine the K-D-R model and Ma Xinfang model, found the fracture temperature model and give the solution.(3) Base on the rock mechanics and hydrodynamics, according to the mass principle of conservation, energy conservation and superposition principle, to founded a suit of consider pressure drop along the fracture height three dimensional fracture extension model ,and solve it.(4)Based on the horizontal well sectionalized hydraulic fractured technology actual condition, to combine the shape of formed fractures and the fluid peculation mechanism together to present a new model, which is based on superposition theory to get a new model to forecast the fractured horizontal well numerous fractures production which consider the mutual disturbance;(5) Based on the above model research results, apply the VB 6.0 to development...