Study On Dense Reservoir By Segmental Fracturing Optimization Of Rang-53 Block

As the continuous exploration and development in oil fields,low permeability and other unconventional oil fields continue to increase,horizontal well combined with fracturing technology has become an important direction and measures in low permeability oil and gas reservoir.However,the research on horizontal fracturing and supporting measures is not deep enough at present,and the calculation of fracturing horizontal well production capacity is not enough and lacks theoretical research.Therefore,the optimization of horizontal fracturing is an important theoretical and practical significance.Based on the Characteristics and Regularity of Seepage in Dense Reservoir,the paper study the sensitivity of porosity stress,the stress sensitivity of the permeability production formula and optimum design of fractured horizontal wells,calculated and analyzed Its impact on the productivity of fractured horizontal wells.Considering the effect of the poly-synergistic effect of the fluid flowing into the wellbore in the fracture,the yield of the fractured horizontal well begins to increase obviously when the porosity stress sensitivity and the permeability stress sensitivity are large,and they need to be considered.The production of fractured horizontal wells did not change significantly when the porosity stress sensitivity and permeability stress sensitivity were small,and the calculation of the production was not necessary.At the same time,the sensitivity of rock stress is analyzed,and the numerical algorithm of matrix equation is used to solve and calculate.Compared with the actual production,the results are better.Based on the above analysis,the fracture parameters are optimized.The more the fracture is,the longer the length of the fracture is,the greater the capacity of the fractures and the greater the production.But when the factors increase to a certain value,The rate of change production is not obvious,and the interference of cracks is not significant.At the same time,the calculation accuracy is higher by comparing with the numerical simulation software.In this paper,the optimized fracturing well parameters are 110~180m,the fracture spacing is19~99m,and the fracture conductivity is 30~90?m2·cm.The optimized yield is increased and the fracturing effect is better.Based on the theoretical research and comparison of the new production formula of fractured horizontal well,this paper lay the foundation for the optimization of the horizontal well fracturing technology in the dense reservoir,and provide a prerequisite for the optimization of the fracturing parameters of the fractured horizontal well conditions.For the future to help the decision making of workers to fracture horizontal wells more efficient.