AbstractsChemistry

"Various theories regarding the pressure build-up characteristics for producing wells are analyzed. The merits and limitations of each theory are discussed. The error involved in plotting the pressure build-up data for the case of well-bore pressure versus shut-in time is pointed out. Equations have been presented for the various quantitative determinations of reservoir properties which can be obtained from typical pressure build-up data. Utilizing all the previous methods presented in the literature, a recommended procedure for field application is proposed. One oil well and three gas wells have been analyzed using the recommended procedure with the attendant calculations given in detail. Two gas wells have been analyzed using both the cumulative production since completion of the well and cumulative production since the last build-up test of the well. The small error introduced by using the more accessible cumulative production since the last test is noted for each of the gas wells investigated" – Abstract, p. ii.