Conventional natural gas reservoirs are the main force of natural gas production and the “ballast stone”. In order to promote the continuous improvement of the development level of conventional gas fields, the gas reservoir recovery evaluation model and the main influencing factors are surveyed and analyzed. Then the difference between improving gas and oil reservoir recovery and the core concept of gas reservoir are compared and analyzed. And two core problems of unbalanced gas utilization and heterogeneous water intrusion are analyzed with technical methods for improving or enhancing gas recovery (IGR or EGR). Then two efficient development examples are analyzed with guidance on balanced development theory in Sulige dense sandstone gas reservoir in Ordos Basin and Longwangmiao Formation gas reservoir in Anyue gas field in Sichuan Basin. Finally, some proposals are put forward to greatly improve gas reservoir recovery by increasing pressure drop ripple coefficient and pressure depletion efficiency, which provides a basis for the top-level design and technology research of using CO2 and chemical methods to improve gas reservoir recovery.
Cite this paper
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