Open Access Article

Title: Numerical study of immiscible CO2 flooding in thick reservoirs with positive rhythm

Authors: Shu Wang; Duoxing Yang; Xinmin Song; Desheng Ma; Jian Gao

Addresses: Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, No. 19, Beitucheng Western Road, Chaoyang District, Beijing, 100029, China ' China Earthquake Administration, Institute of Crustal Dynamics, No. 1, Anningzhuang Rd, Haidian District, Beijing, 100085, China ' Research Institute of Petroleum Exploration and Development, PetroChina, No. 20, Xueyuan Rd, Haidian District, Beijing, 100083, China ' Research Institute of Petroleum Exploration and Development, PetroChina, No. 20, Xueyuan Rd, Haidian District, Beijing, 100083, China ' Research Institute of Petroleum Exploration and Development, PetroChina, No. 20, Xueyuan Rd, Haidian District, Beijing, 100083, China

Abstract: Benefitting from the development of carbon capture and storage (CCS) technology, CO2 flooding for enhanced oil recovery (EOR) has become increasingly attractive to the petroleum industry. This paper presents a numerical study about the feasibility and efficiency of the immiscible CO2 flooding process, which is a potential tertiary oil recovery method for use after water flooding, with advantages of lower cost and fewer facility requirements than miscible CO2 flooding. A numerical simulation model established from laboratory experimental results was used to predict fluid behaviour and influence factors of immiscible CO2 flooding in thick reservoirs with positive rhythm to enhance oil recovery after water flooding. Injection and confining pressure conditions are both important to the displacement process and results.

Keywords: immiscible CO2 flooding; carbon dioxide; enhanced oil recovery; EOR; thick reservoirs; positive rhythm; numerical simulation; multiphase flow; carbon capture and storage; CCS; petroleum industry; water flooding; displacement process.

DOI: 10.1504/PCFD.2017.081717

Progress in Computational Fluid Dynamics, An International Journal, 2017 Vol.17 No.1, pp.34 - 41

Received: 08 May 2021
Accepted: 12 May 2021

Published online: 23 Jan 2017 *