Screening and simulation of offshore CO2-EOR and storage: A case study for the HZ21-1 oilfield in the Pearl River Mouth Basin, Northern South China Sea. (July 2019)

• Record Type: Journal Article
• Authors: Li, Pengchun; Yi, Linzi; Liu, Xueyan; Hu, Gang; Lu, Jiemin; Zhou, Di; Hovorka, Susan; Liang, Xi
• Is Part Of: International journal of greenhouse gas control. Volume 86(2019)
• Page Start: 66
• Page End: 81
• Publication Date: 2019-07
• Subjects: CO2-EOR -- CO2 storage -- Quick screening -- Compositional simulation -- Offshore HZ21-1oilfield; Greenhouse gases -- Environmental aspects -- Periodicals; Air -- Purification -- Technological innovations -- Periodicals; Gaz à effet de serre -- Périodiques; Gaz à effet de serre -- Réduction -- Périodiques; Air -- Purification -- Technological innovations; Greenhouse gases -- Environmental aspects; Periodicals; 363.73874605
• DOI: 10.1016/j.ijggc.2019.04.015
• Languages: English
• ISSNs: 1750-5836

Abstract

Highlights: Couples of multiparameter screening and compositional simulation are useful for site optimization for CO2 -EOR and storage. Miscible CO2 flooding with one or two injection wells are the best operation for M10 reservoir. Well pattern and bottom pressures of CO2 injection control the mechanism and efficiency of CO2 flooding. HZ21-1 field has considerable potential for applying offshore CO2 -EOR and CO2 storage technology of Guangdong CCUS project. Abstract: CO2 -enhanced oil recovery (CO2 -EOR) and storage is currently the most effective and economic technology for reducing CO2 emissions from burning fossil fuels in large scale. This paper is the first effort of proposing a modelling assessment of CO2 -EOR and storage in the HZ2-1 oilfield in the Pearl River Mouth Basin in northern South China Sea offshore Guangdong Province. We attempt to couple the multi-parameter dimensionless quick screening model and reservoir compositional simulation for optimization of site screen and injection simulation. Through the quick screening, the reservoirs are ranked by EOR dimensionless recovery RD, and by CO2 storage in pore volume SCO2 . Our results indicate that SCO2 is highly pressure dependent and not directly related to RD . Of these reservoirs, CO2 -EOR and storage potential of the M10 was estimated through a compositional simulation as a case study based on a 3D geological model. Nine scenarios of CO2 injection operations have been simulated for 20 years with different well patterns and injection pressures. The simulation results represent an obvious improvement in oil production by CO2 flooding over No−CO2 production. The best operation for M10 is miscible CO2 flooding, which led to the higher recovery factors of 52%˜58% and CO2 stored masses of 8.1×10 6 ˜10.8×10 6 t. The optimum operation for CO2 injection should be set well pattern in region of injector I1 and high injection pressure for miscible flooding. In a whole, the HZ21-1 field can be used as a candidate geological site for GDCCUS project. We are fully aware of the limitation in the primary modelling including reservoir and fluid properties and production history matching, and regard this study as a general and hypothetic proposal.