Pressure Sensitive Gas Reservoirs Horizontal Well Drainage Gas Recovery

Pressure-sensitive horizontal wells may not produce gas in the production process,because of decreased permeability,slippage effect,horizontal wellbore pressure drop and horizontal wellbore fluid.Based on the basic theory of fluid mechanics and seepage mechanics,considering pressure sensitive,slippage effect,horizontal wellbore pressure drop and horizontal wellbore fluid,this paper gives horizontal well productivity model,establishes the sectional completion coupled model of wellbore flow and reservoir percolation,the sectional completion productivity calculation model for horizontal wells has been completed,and the solution has been given.The key factor for pressure-sensitive horizontal gas drainage process selection are well type,control of production and reservoir pressure protection.Considering the pressure-sensitive gas drainage recovery technology and a variety of drainage gas recovery technology adaptability and feasibility analysis,rod pump drainage gas recovery,due to its production of control lability,is suitable for pressure-sensitive horizontal gas wells.Based on the established model,we develop pressure-sensitive horizontal well drainage gas recovery analysis and design software,and finish the section variable parameter completion design.Results show that the software is practical,it has a certain guiding role in the formulation of the pressure-sensitive horizontal well development plan.