Evaluation of CO2 storage potential of oil reservoirs in Ordos Basin

Abstract

The huge impact of the emission of the greenhouse gas CO2 on the global climate and environment has caused wide concern all over the world. Deep CO2 emission reduction is the only way for sustainable development of human beings. In order to meet the urgent need of sustainable economic and social development, effective measures must be taken to achieve large-scale CO2 emission reduction. As an increasingly mature and feasible technology, CO2 geological sequestration has become one of the effective ways to achieve large-scale CO2 emission reduction. In ordos basin as the research object, this paper documents and basic information system collect and organize data, evaluated the ordos basin in turn CO2 enhanced oil recovery (CO2-EOR) and CO2 sequestration potential, depleted oil reservoir and select 60 oilfield in ordos basin CO2 sequestration potential analysis and to meet the requirements of 27 oilfield seal ratio analysis, the results showed that: Under the screening condition that the burial depth is greater than 800 m, when assuming that 60 oilfields in the ordos basin are all used for co2-eor, the CO2 sequestration potential of the reservoir is about 318.27 Mt; when 60 oilfields are all treated as abandoned reservoirs, the CO2 sequestration potential of the reservoir is about 1221.57 Mt. When the amount of CO2 to be sequestered is small, Huachi (Changqing) field should be preferred, and when the amount of CO2 to be sequestered is large, Jiyuan (Changqing) field should be preferred. In this paper, the evaluation results of CO2 sequestration potential of reservoir in ordos basin are of great significance to the further development of theoretical sequestration potential evaluation and engineering planning of ordos basin.