Evaluation of enhanced oil recovery potential using gas/water flooding in a tight oil reservoir

Xiang Zhou, Yongchao Wang, Liehui Zhang, Kewei Zhang, Qi Jiang, Hongbn Pu, Li Wang, Qingwang Yuan

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, experimental research was implemented to optimize production performance using flooding processes. Firstly, the phase behaviors of live oil–gas (N2, natural gas, and CO2) systems were studied in a pressure-volume-temperature cell to measure the properties of the gas-saturated live oil (including gas-oil ratio, oil-swelling factor, density, and viscosity). Secondly, water flooding and gas flooding were carried out in long-core plugs to study the mechanisms and production performance of water/gas flooding. The experimental results of the phase behaviors indicate that, among the three gases, CO2 is the best choice to boost the properties of live oil, evidenced by high mole fraction in the saturated oil (58.65 mol.%), high oil-swelling factor (1.4482), and high viscosity reduction ratio (90.6%). N2 showed the lowest property performance in the gas injection process when the phase behavior experiment was carried out. The production
Original languageEnglish
Pages (from-to)117706
JournalFuel
StatePublished - Jul 15 2020

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