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research-article

Characterization of foamy oil and gas/oil two-phase flow in porous media for a heavy oil/methane system

[+] Author and Article Information
Xinqian Lu

Petroleum Systems Engineering, Faculty of Engineering and Applied Science University of Regina, Regina, Saskatchewan, S4S 0A2, Canada
lu292@uregina.ca

Xiang Zhou

Petroleum Systems Engineering, Faculty of Engineering and Applied Science University of Regina, Regina, Saskatchewan, S4S 0A2, Canada
zhouxiang@uregina.ca

Jianxin Luo

College of Petroleum Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China
6641883@qq.com

Fanhua Zeng

Petroleum Systems Engineering, Faculty of Engineering and Applied Science University of Regina, Regina, Saskatchewan, S4S 0A2, Canada
fanhua.zeng@uregina.ca

Xiaolong Peng

Petroleum Systems Engineering, Faculty of Engineering and Applied Science University of Regina, Regina, Saskatchewan, S4S 0A2, Canada
peng200x@uregina.ca

1Corresponding author.

ASME doi:10.1115/1.4041662 History: Received July 20, 2018; Revised September 29, 2018

Abstract

In our previous study, a series of experiments had been conducted by applying different pressure depletion rates in a 1-meter long sand-pack. In this study, numerical simulation models are built to simulate the lab tests, for both gas/oil production data and pressure distribution along the sand-pack in heavy oil/methane system. Two different simulation models are used: (1) equilibrium black oil model with two sets of gas/oil relative permeability curves; (2) a four-component non-equilibrium kinetic model. Good matching results on production data are obtained by applying black oil model. However, this black oil model cannot be used to match pressure distribution along the sand-pack. This result suggests the description of foamy oil behavior by applying equilibrium black oil model is incomplete. For better characterization, a four-component non-equilibrium kinetic model is developed aiming to match production data and pressure distribution simultaneously. Two reactions are applied in the simulation to capture gas bubbles status. Good matching results for production data and pressure distribution are simultaneously obtained by considering low gas relative permeability and kinetic reactions. Simulation studies indicate that, higher pressure drop rate would cause stronger foamy oil flow, but the exceed pressure drop rate could shorten life-time of foamy oil flow. This work is the first study to match production data and pressure distribution and provides a methodology to characterize foamy oil flow behavior in porous media for a heavy oil/methane system.

Copyright (c) 2018 by ASME
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