Simultaneous effect of geological heterogeneity and condensate blockage on well test response of gas condensate reservoirs

Farhoodi, Shahab; Sadeghnejad, Saeid; Dehaghani, Amir Hossein Saeedi

doi:10.1016/j.jngse.2019.03.022

Cited by 9 publications

(1 citation statement)

References 33 publications

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“…Furthermore, many experiments found that threshold pressure gradient existed in low-permeability reservoir (Guo and Wu 2007;Gao et al 2008;Dou et al 2014). Condensate blockage and relative permeability are research focuses in condensate gas reservoir (Farhoodi et al 2019;Gholampour and Mahdiyar 2019). Slippage effect, stress sensitivity and threshold pressure gradient are usually considered in low-permeability and tight gas reservoir.…”

Section: Introductionmentioning

confidence: 99%

Productivity equation of low-permeability condensate gas well considering the influence of multiple factors

Yan

Zhang

Yuan

et al. 2019

J Petrol Explor Prod Technol

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Establishment of productivity equation is an important premise for rational and efficient development of low-permeability condensate gas reservoir and accurate analysis of production performance. Based on two-phase seepage mechanism of gas and condensate oil in formation, the productivity equation is established considering threshold pressure, stress sensitivity, slippage effect, retrograde condensate effect and high-velocity non-Darcy effect. The integrals of pseudo-pressure, turbulence factor and pseudo-threshold pressure are calculated with numerical method to resolve the productivity equation. Example calculation results indicate that with the decrease in bottom hole pressure, the increase in condensate gas well production rate is near linear first and then the increase is getting slower and slower. Slippage effect increases apparent permeability and condensate gas well productivity. Retrograde condensate effect, stress sensitivity and threshold pressure decrease apparent permeability and condensate gas well productivity. Based on orthogonal experiment design, the sensitive parameters influencing the productivity of low-permeability condensate gas well are analyzed. Various factors have different influence degrees on gas well productivity in different ranges of bottom hole pressure. Research results lay a theoretical foundation for taking measures to improve gas well productivity in the gas field.

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Section: Introductionmentioning

confidence: 99%