A Method of Determining Bottom-hole Flowing Pressure by Using Back-pressure Testing Data

A new method was introduced for determining bottom-hole flowing pressure and formation pressure during the production of gas wells without bottom-hole pressure testing.It was found out from the statistics of back pressure testing data that for each gas well,if the special relationship between the production tubing-strings,well head pressure and bottom flowing pressure was determined,the function between bottom flowing pressure and vertical pressure loss was established with the relationship,then bottom flowing pressure and formation pressure could be obtained according to well head pressure and binomial deliverability equations.So this method is sample for operation without needs of pressure testing and the downhole pressure and formation pressure are obtained without increasing operation cost for getting bottom-hole flowing pressure.Reservoir management department can get real-time bottom flowing pressure to ensure the gas reservoir development for maximum economic interests.