Production Law Of Water Producing Well And Adaptability Evaluation Of Drainage Gas Recovery In West Area Of Sulige Gas Field

Due to the development of reservoir formation water in the west area of Sulige gas field,liquid production is common in the later stage of gas well production,and with the extension of production time,the gas well production gradually decreases,resulting in poor liquid carrying capacity of gas wells,aggravation of gas well liquid accumulation,and rapid increase of low production and low efficiency wells According to the geological characteristics,the adaptability conditions and application effects of various drainage and gas production technologies are analyzed in depth.Through the research,the following conclusions are obtained:(1)the division standard of low production and low efficiency wells in Su 48 block is determined.The daily production of vertical wells and straight cluster wells is less than3000m~3at the end of the period,the unit pressure drop gas production in the last three months is less than 20×10~4m~3/MPa,the daily output of horizontal wells is less than 4000m~3in the last three months,and the unit pressure drop gas production in the last three months is less than 40×10~4m~3/MPa(2)poor reservoir physical properties and high water saturation are the main reasons for low efficiency of gas wells;(3)most of the reservoirs are water bearing,and the gas reservoirs are less developed;there is no unified gas water boundary;vertically,the proportion of upper water layer is higher;on the plane,the production of liquid is obvious in the West and north of the work area;(4)the use of Li Min model,Turner model,Coleman model,and so on The liquid carrying capacity of wellbore is calculated by Orkiszewski model,and Li Min model is more suitable for west area of Sulige gas field;(5)the velocity string,plunger and bubble drainage gas production measures are analyzed by using Limin model,and it is suggested that 5 bubble drainage wells,11 velocity string wells and 42 plunger wells are recommended;(6)the layer inspection work is carried out,and it is suggested to carry out hole patching for 7 wells.The research results can effectively guide the fine management and development of gas wells in west area of Sulige gas field.