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Practical solution for stabilized pseudo-steady state productivity index of multiple vertical wells depleting closed reservoirs

引用

Petroleum 2020年第1期6卷 53-69页

作者： Salam Al-Rbeawi Fadhil S.Kadhim METU-Northern Cyprus Campus Cyprus University of Technology Iraq

The objective of this paper is introducing practical solutions for stabilized pseudo-steady state productivity index and pressure behaviors and flow regimes of multiple vertical wells depleting closed rectangular *** introduces full understanding of reservoir performance during transient and pseudo-steady state flow using pressure and pressure derivative patterns and productivity index and productivity index derivative *** practical solutions proposed in this study are relied on a new approach for accurate estimation of starting time of pseudo-steady state flow and stabilized productivity index by applying productivity index derivative that converges mathematically to zero at the beginning of this *** is also an attempt for pointing out the optimal reservoir configuration that can give maximum stabilized pseudo-steady state productivity index for different wellbore types and distributions in the drainage *** analytical models are used in this study for describing pressure drop and productivity index behavior of multiple vertical wells considering different reservoir configurations and different wellbore types and *** wells were assumed either fully or partially penetrate the *** pressure models are justified to generate two pressure derivatives,one represents the derivative of time dependent pressure drop and the second represents the derivative of time-invariant pressure *** two derivatives are used for determining the starting time of pseudo-steady state flow and stabilized productivity index when both converge and mathematically become *** models are used also to generate several plots for time-invariant or stabilized pseudo-steady state productivity index for different reservoir geometries considering different wellbore *** maximum stabilized productivity index is illustrated in these plots and several analytical models for the expected flow regimes are developed using pressure a

关键词： Pressure behavior and flow regimes Reservoir characterization Reservoir performance vertical wells Modeling and simulation Productivity index

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