Evaluating the Impact of Wellbore Type on Effective Recovery of Condensates in a Gas Condensate Reservoir

Abstract

Abstract The objective of the study was to evaluate the impact of different wellbore types on the effective retrieval of condensates in a gas condensate reservoir. Two reservoir models were built using CMG (Computer Modelling Group) and IMEX reservoir simulation models. These models had similar rock and fluid parameters, but the only difference was the type of well used. Model A is equipped with a vertical well, while Model B has a horizontal well. The results revealed notable discrepancies in the recovery performance between the two types of wells. Model A, with a vertical well, displayed an initial decrease in output, commencing at a rate of 123 million standard cubic feet per day of gas and 350 barrels per day of condensates at the separator. By the third year, the rate of recovery sharply decreased to less than 20 barrels per day of condensate and 1 million standard cubic feet per day, indicating a dramatic fall in the productivity of the reservoir. On the other hand, Model B, which included a horizontal well, showed a more advantageous recovery path. Gas extraction has commenced at a rate of around 1000 million standard cubic feet per day, together with a strong recovery of 704 barrels per day of condensate in the separator. In contrast to the vertical well, the horizontal well demonstrated consistent and prolonged performance until encountering a decrease. The results emphasize the significant influence of wellbore type on the efficiency of recovering condensate in gas condensate reservoirs. Horizontal wells have shown improved performance in terms of enhanced recovery rates and sustained productivity when compared to vertical wells. This study provides useful information for enhancing the development and exploitation strategies of gas condensate reservoirs.