Simulation studies of Gas-Injection into Gas-Condensate Reservoirs

Diamond, Luis; Rondon, Cesar

doi:10.2523/21060-ms

Cited by 1 publication

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“…Although many scholars have conducted a lot of research on the water injection of gas condensate reservoir (Cason, 1989;Fishlock and Probert, 1996;Henderson et al, 1993;Matthews et al, 1988), there are still disadvantages such as the gas trapping and water breakthrough. Thus, gas injection is still the preferred option for the development of gas condensate reservoir (Ayala and Ertekin, 2005;Chen et al, 2012;Diamond and Rondon, 1990;Jessen and Orr, 2003;Li et al, 2016). Standing et al (1948) pointed out that all the condensate oil can be produced if there are enough gas to be injected into the reservoir.…”

Section: Introductionmentioning

confidence: 99%

An evaluation on phase behaviors of gas condensate reservoir in cyclic gas injection

Zhang

Fan

Zhao

et al. 2020

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Maintaining the reservoir pressure by gas injection is frequently adopted in the development of gas condensate reservoir. The aim of this work is to investigate the phase behavior of condensate oil and remaining condensate gas in the formation under gas injection. The DZT gas condensate reservoir in East China is taken as an example. The multiple contact calculation based on cell-to-cell method and phase equilibrium calculations based on PR Equation of State (EOS) were utilized to evaluate the displacement mechanism and phase behavior change. The research results show that different pure gas has different miscible mechanism in the displacement of condensate oil: vaporizing gas drive for N2 and CH4; condensing gas drive for CO2 and C2H6. Meanwhile, there is a vaporing gas drive rather than a condensing gas drive for injecting produced gas. When the condensate oil is mixed with 0.44 mole fraction of produced gas, the phase behavior of the petroleum mixture reverses, and the condensate oil is converted to condensate gas. About the reinjection of produced gas, the enrichment ability of hydrocarbons is better than that of no-hydrocarbons. After injecting produced gas, retrograde condensation is more difficult to occur, and the remaining condensate gas develops toward dry gas.

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