Application of Advanced Water Injection Inflow Production Relation Model in Low-Permeability Reservoir

doi:10.3969/j.issn.1006-6535.2020.04.014

Abstract

Abstract: There is a three-phase flow between water, injection water and dissolved gas in the low permeability reservoir with advanced water injection in the production process. In order to further characterize the three-phase seepage performance, the fluid flow in the reservoir was divided into oil-water two-phase seepage zones and oil-gas-water three-phase seepage zones. Based on a three-phase quasi-pressure function, a three-phase flow productivity equation with inflection point was established by considering the non-Darcy effect (starting pressure gradient, stress sensitivity). Research indicates that the test data is consistent with the calculation of three-phase seepage model after automatic fitting of non-Darcy flow parameters. Application of 4 wells shows that the production can be enhanced by about 195.0% when the production well is controlled below the inflection pressure. Multiple factors show a significant influence on the well production in the high flowing pressure stage, and the water cut is considered as the most sensitive factor. This research could provide certain guidance for the determination of reasonable bottom hole flowing pressure limit in low permeability reservoir with advanced water injection.

Key words: advanced water injection, three-phase flow, low permeability reservoir, non-Darcy effect, automatic fitting, injection performance

CLC Number:

TE348

Zhang Jiqiang. Application of Advanced Water Injection Inflow Production Relation Model in Low-Permeability Reservoir[J]. Special Oil & Gas Reservoirs, 2020, 27(4): 92-97.

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