Application of Phase Change Tracking Approach in Predicting Condensate Blockage in Tight, Low, and High Permeability Reservoirs

Abstract

Prediction of the timing and location of condensate build-up around the wellbore in gas condensate reservoirs is essential for the selection of appropriate methods for condensate recovery from these challenging reservoirs. The present work focuses on the use of a novel phase change tracking approach in monitoring the formation of condensate blockage in a gas condensate reservoir. The procedure entails the simulation of tight, low and high permeability reservoirs using global and local grid analysis in determining the size and timing of three common regions (Region 1, near wellbore; Region 2, condensate build-up; and Region 3, single-phase gas) associated with single and two-phase gas and immobile and mobile gas condensate. The results show that permeability has a significant influence on the occurrence of the three regions around the well, which in turn affects the productivity of the gas condensate reservoir studied. Predictions of the timing and location of condensate in reservoirs with different permeability levels of 1 mD to 100 mD indicate that local damage enhances condensate formation by 60% and shortens the duration of the immobile phase by 45%. Meanwhile, the global change in permeability increases condensate formation by 80% and reduces the presence of the immobile phase by 60%. Finally, this predictive approach can help in mitigating condensate blockage around the wellbore during production.

Numerical Well Test Analysis of Condensate Dropout Effects in Dual-Permeability Model of Naturally Fractured Gas Condensate Reservoirs: Case Studies in the South of Iran

“…Due to the complex phase and fluid flow behavior of these reservoirs, their evaluation becomes a challenging issue. With condensate accumulation around the well, the effective permeability is reduced substantially [38,[57][58][59][60][61][62][63][64][65][66][67][68].…”

“…ree-region composite is the most frequently used model in the gas condensate reservoir evaluation [42,52,56,[58][59][60][61][62][63].…”

A Novel Method for the Quantitative Evaluation of Retrograde Condensate Pollution in Condensate Gas Reservoirs

“…To study the retrograde phenomenon and assess its impact on the yield during the development of condensate gas reservoirs, substantial research has been conducted on condensate gas phase characteristics, the evaluation of retrograde pollution, and the impact of retrograde pollution on production, which has mainly been carried out through physical experiments and numerical simulation methods [8][9][10][11]. In relation to the phase characteristics of condensate gas reservoirs, Onoabhagbe et al [12] propose a novel approach for tracking the phase change based on simulating the formation of condensate blockage in tight as well as low-and high-permeability reservoirs; Wang et al [13] improve the Peng-Robinson model to simulate the phase change of condensate gas and calculate the Processes 2024, 12, 522 2 of 14 volume of condensate oil considering the effect of capillary forces; and Abbasov et al [14] analyze the influence of gas components on the retrograde condensation of condensate gas based on the results of retrograde condensation simulation experiments. During the evaluation of retrograde pollution, Dinariev and Evseev [15] construct a condensate liquid production model for the multicomponent flow of condensate gas based on the dynamic characteristics of the condensate gas phase change.…”