Abstract
CO2 capture and reinjection process (CCRP) can reduce the used CO2 amount and improve the CO2 storage efficiency in CO2 EOR projects. To select the best CCRP is an important aspect. Based on the involved equipment units of the CCRP, a novel techno-economic model of CCRP for produced gas in CO2 EOR and storage project was established. Five kinds of CO2 capture processes are covered, including the chemical absorption using amine solution (MDEA), pressure swing adsorption (PSA), low-temperature fractionation (LTF), membrane separation (MS), and direct reinjection mixed with purchased CO2 (DRM). The evaluation indicators of CCRP such as the cost, energy consumption, and CO2 capture efficiency and purity can be calculated. Taking the pilot project of CO2 EOR and storage in XinJiang oilfield China as an example, a sensitivity evaluation of CCRP was conducted based on the assumed gas production scale and the predicted yearly gas production. Finally, the DRM process was selected as the main CCRP associated with the PSA process as an assistant option. The established model of CCRP can be a useful tool to optimize the CO2 recycling process and assess the CO2 emission reduction performance of the CCUS project.
Highlights
CO2 capture and storage (CCS) has been an effective measure to reduce CO2 emissions into the atmosphere
A sensitivity evaluation on the CO2 capture and reinjection process (CCRP) of the CO2 EOR and storage project in XinJiang oilfield was conducted according to the possible gas production scale and CO2 purity
It was assumed that the project lasts for 15 years, the discount rate is 12%, and the gas is produced at a scale of (5–50) × 104 Sm3/d with a CO2 content varying in a range of 20–80 mol%
Summary
CO2 capture and storage (CCS) has been an effective measure to reduce CO2 emissions into the atmosphere. Zhou researched the CA-MDEA (chemical absorption-methyldiethanolamine), LTF, and MS processes to separate CO2 from the produced gas in the CO2 EOR project in the Shengli oilfield, and the influences of different operating parameters on the system energy consumption were analyzed [15]. Zhai et al evaluated the technical and economic indicators of carbon capture and storage combined with powerco-generation system utilization of deep saline water in the coal chemical project in Ordos, China, and discussed the economic feasibility of the large-scale application of CCS in water-scarce areas [22]. A novel techno-economic evaluation model of CCRP for produced gas in CO2 EOR and storage project was established based on the involved equipment units which can flexibly combine into any CCRPs. The evaluation indicators, including the cost, energy consumption, equivalent CO2 emissions, CO2 capture efficiency, and purity of CCRP, could be calculated. The results can guide the design of the CO2 project in XinJiang oilfield
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
