摘要
Abstract
Focusing on the upstream,midstream,and downstream integration of carbon dioxide(CO2)capture,utilization,and storage(CCUS),this paper dynamically analyzes the costs and benefits of each stage in a CO2 enhanced oil recovery(EOR)project.The upstream phase involves CO2 capture by coal chemical enterprises,while the downstream phase encompasses the integrated gas injection,oil recovery,and storage operations conducted by oilfield enterprises.Based on such three development technologies employed at different stages of oil production plant as natural oil recovery,water injection,and water-gas mixed injection,it proposes a cost accounting system to evaluate the economic performance of each extraction method,establishes a dynamic analysis framework to assess the efficiency and profitability of oil production and carbon storage by incorporating CO2 sequestration subsidies,and selects a typical CCUS-EOR project for validation.The results indicate that the project area can be divided into three phases according to the adopted oil recovery method after operation commences.Natural oil recovery exhibits an initial rise followed by a peak decline,with production decreasing at an average rate of 9.74%.During the water injection stage,oil production follows a"rise-fluctuation-decline"trend,whereas the water-gas mixed injection stage enters a stable production period.The CO2-oil displacement ratio remains high initially before stabilizing around 0.44 for an extended duration.When CO2 storage subsidies are considered,the net emission reductions can be traded in the carbon market,generating additional revenue of 13.19 million yuan of sequestered CO2.Among the various cost components,transportation costs account for the highest proportion.Adopting pipeline transportation technology can reduce long-term costs by up to 37.82%.关键词
二氧化碳捕集利用与封存/CCUS/CCUS-EOR提高原油采收率/成本分析/碳排放/换油率Key words
CCUS/enhanced oil recovery/cost analysis/carbon emissions/oil exchange rate/CCUS-EOR分类
经济学
