Simulation of Liquid Carrying Capacity of Process Wells in Carbonate Bottom Water Gas Reservoirs

Abstract

During the development process of carbonate rock bottom water gas reservoirs, bottom water is prone to water channeling along the high permeability channels of fractures and caves, resulting in relatively high water production after water breakthrough in gas wells. However, traditional methods for calculating the critical liquid carrying capacity of gas wells have limitations in calculating the liquid carrying capacity of gas wells and the unsteady flow of gas-water two-phase flow when the water production is high. The calculation results have significant errors, making it difficult to guide the formulation of waterproof and water control measures for carbonate bottom water gas reservoirs. Therefore, by introducing computational fluid dynamics (CFD) simulation technology, this paper has realized the numerical simulation calculation of gas water two-phase unsteady flow in directional wells (horizontal wells and highly deviated wells) under different formation inflow boundary strips, visualized and quantitatively analyzed the change law of gas water two-phase flow pattern in directional wells under different production conditions and the liquid carrying production capacity of gas wells, and mastered the inhibitory effect of gas well water production on gas production, Solved the suitability of directional well waterproofing and water control, as well as the optimization design of well trajectory, providing a new technical means for water control and development of carbonate rock bottom water gas reservoirs.

Copyright 2023, IFEDC Organizing Committee.

This paper was prepared for presentation at the 2023 International Field Exploration and Development Conference in Wuhan, China, 20–22 September 2023.

This paper was selected for presentation by the IFEDC Committee following review of information contained in an abstract submitted by the author(s). Contents of the paper, as presented, have not been reviewed by the IFEDC Technical Team and are subject to correction by the author(s). The material does not necessarily reflect any position of the IFEDC Technical Committee its members. Papers presented at the Conference are subject to publication review by Professional Team of IFEDC Technical Committee. Electronic reproduction, distribution, or storage of any part of this paper for commercial purposes without the written consent of IFEDC Organizing Committee is prohibited. Permission to reproduce in print is restricted to an abstract of not more than 300 words; illustrations may not be copied. The abstract must contain conspicuous acknowledgment of IFEDC. Contact email: paper@ifedc.org.