Title : An Unsteady-State Productivity Model and Main Influences on Low-Permeability Water-Bearing Gas Reservoirs at Ultrahigh Temperature/High Pressure.

Pub. Date : 2022 Mar 1

PMID : 35252656






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1 An Unsteady-State Productivity Model and Main Influences on Low-Permeability Water-Bearing Gas Reservoirs at Ultrahigh Temperature/High Pressure. Water gastrin Homo sapiens
2 For example, the Ledong block in the South China Sea is a typical gas reservoir characterized using ultrahigh temperature (190 C), high pressure (90 MPa), high water production, and low permeability (less than 1 mD). Water gastrin Homo sapiens
3 Accordingly, this study, which is based on the seepage theory, considers the influence of water production on the productivity of a single well; this study establishes an evaluation method for a low-permeability water-bearing gas reservoir vertical well (i.e., a highly deviated well) to determine how an unsteady state affects productivity. Water gastrin Homo sapiens
4 Research shows the following order of factor influence on productivity: produced water-gas volume ratio > permeability > stress sensitivity coefficient > reservoir thickness > start-up pressure gradient > well deviation angle > discharge radius. Water gastrin Homo sapiens
5 Water saturation is the main factor affecting the unsteady-state productivity of gas wells in low-permeability gas reservoirs. Water gastrin Homo sapiens
6 Water saturation is the main factor affecting the unsteady-state productivity of gas wells in low-permeability gas reservoirs. Water gastrin Homo sapiens
7 Moreover, a continuous increase in the stress sensitivity coefficient, start-up pressure gradient, and water saturation caused a leftward shift in the inflow performance relationship curves of the modeled gas wells, whereas their production decreased. Water gastrin Homo sapiens