Open Access

ARTICLE

Simulation of Gas-Water Two-Phase Flow in Tight Gas Reservoirs Considering the Gas Slip Effect

Mingjing Lu^1,2,*, Zenglin Wang^1,3, Aishan Li¹, Liaoyuan Zhang¹, Bintao Zheng¹, Zilin Zhang¹
1 Petroleum Engineering Technology Research Institute of Shengli Oilfield, Sinopec, Dongying, 257067, China
2 Postdoctoral Scientific Research Working Station of Shengli Oilfield, Sinopec, Dongying, 257067, China
3 Shengli Oilfield, Sinopec, Dongying, 257067, China
* Corresponding Author: Mingjing Lu. Email:
(This article belongs to this Special Issue: Meshless, Mesh-Based and Mesh-Reduction Methods Based Analysis of Fluid Flow in Porous Media)

Fluid Dynamics & Materials Processing 2023, 19(5), 1269-1281. https://doi.org/10.32604/fdmp.2023.023188

Received 11 April 2022; Accepted 09 August 2022; Issue published 30 November 2022

Abstract

A mathematical model for the gas-water two-phase flow in tight gas reservoirs is elaborated. The model can account for the gas slip effect, stress sensitivity, and high-speed non-Darcy factors. The related equations are solved in the framework of a finite element method. The results are validated against those obtained by using the commercial software CMG (Computer Modeling Group software for advanced recovery process simulation). It is shown that the proposed method is reliable. It can capture the fracture rejection characteristics of tight gas reservoirs better than the CMG. A sensitivity analysis of various control factors (initial water saturation, reservoir parameters, and fracturing parameters) affecting the production in tight gas wells is conducted accordingly. Finally, a series of theoretical arguments are provided for a rational and effective development/exploitation of tight sandstone gas reservoirs.

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Keywords

Tight gas reservoir; gas-water two-phase flow; numerical simulation; fractured horizontal well; gas slip effect

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