Explicit original gas in place determination of naturally fractured reservoirs in gas well rate decline analysis

Naturally fractured gas reservoirs have contributed significantly to global reserves and production. The classical gas-well decline analysis relies largely on Arps’ empirical models, or modern production associating with pseudo-variables. explicit original in place determination methodology is extended from homogeneous reservoir naturally under constant variable bottom-hole pressure conditions rate analysis. Then, the relationship between flow average pseudo-pressure boundary-dominated period re-derived. This formula same format equation for by due introduction of a new productivity index parameter that captures inter-porosity fracture matrix natural reservoir. proposed step-by-step procedures are applied here, which enable estimation exponent straightforward without any iterative calculations. Four simulated cases prove our can be successfully used heterogeneous irregular boundary conditions. Document Type: Original article Cited as: Wang, Y., J., Zhao, W., Ji, P., Cheng, S., Yu, H. Explicit well Advances Geo-Energy Research, 2023, 9(2): 117-124. https://doi.org/10.46690/ager.2023.08.05