A Research of Material Balance Equation Applied to Shale Gas Reservoir Considering Adsorption Phase Volume

The development of shale gas reserves is the current hotspot of oil and gas exploration and development at home and abroad. Correctly estimated reserves of gas reservoir has become increasingly urgent. The estimated of shale gas reservoir dynamic reserves in the past did not consider the influence of adsorbed phase occupies volume. In order to estimate the shale gas reservoir dynamic reserves exactly, Firstly this paper introduced the adsorbed gas apparent porosity to consider the influence of adsorbed phase volume, then we detailed discusses the establishment and linearization process of material balance equation. Through live cases, we proved the reliability and practicality of the material balance equation.