Research on Molecular Diffusion Coefficient of Gas-Oil System

Anping Ye¹, Xiaoying Shen², Ping Guo¹, Shaoping Wang³, Zhongzhao Cheng⁴

¹State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, China.
²State Intellectual Property Office, Beijing, China.
³No.2 Oil Production Plant, Petro China Changqing Oilfield Company, Qingyang, China.
⁴Xi’an Changqing Technology & Engineering Company Ltd., Xi’an, China.

DOI: 10.4236/ojogas.2016.11002                

Abstract

During the process of gas injection flooding, when the gas comes into contact with oil, the mass-transfer phenomenon occurs. This changes the properties of the crude oil, improves the flow capacity, and thus enhances the oil recovery. Molecular diffusion coefficient is an important parameter to describe the mass-transfer rate of gas-oil system. At present, molecular diffusion coefficient is usually tested via indirect methods. There are 2 key points that should be noticed when testing this parameter. Firstly, select proper experimental methods. Secondly, use accurate model to describe the experimental data. In this research, the authors describe the researches on the experiment methods for determining diffusion coefficient for gas-oil system, the experiments and models on pressure decay, and the influencing factors that determine diffusion coefficient.

Keywords

Oil, Mass Transfer, Molecule Diffusion Coefficient

Conflicts of Interest

The authors declare no conflicts of interest.

References