Modification of the Calculation Method for Dynamic Reserves in Tight Sandstone Gas Reservoirs.

ABSTRACT: The determination of dynamic reserves is important for tight sandstone gas reservoirs in production. Based on the geological and gas data of the Yan'an gas field, the influence of pressure on the properties of natural gas is studied by mathematical methods. At the same time, the modified flowing material balance equation is established considering the changes in gas viscosity and compressibility. The result shows that (1) the viscosity of natural gas increases rapidly with pressure; (2) the deviation factor decreases with pressure (P < 15 MPa) and then increases (P > 15 MPa) with temperature; (3) the compressibility decreases rapidly with pressure and increases with temperature; (4) compared with the results of the material balance method, the average error of the flowing mat

SUBMITTER: He J 

PROVIDER: S-EPMC8582069 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature