Title: Potential evaluation of CO₂ flooding for EOR and sequestration in YL oilfield of China

Authors: Liping He; Pingping Shen; Xinwei Liao; Hao Chen; Fangfang Li; Changlin Liao

Addresses: MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing 102249, China; PetroChina Coalbed Methane Company Limited, Beijing 100028, China ' MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing 102249, China; PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China ' MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing 102249, China ' MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing 102249, China; The University of Texas at Austin, Austin, TX, 78741, USA ' MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing 102249, China ' MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing 102249, China

Abstract: Ordos Basin is the largest low permeability onshore petroliferous basin in China, with the total reserve amount of over one billion ton. CO₂ EOR and sequestration in this region enjoy huge potential and broad prospect. In this paper, eighteen oilfields in YL City and its surrounding area within 300 kilometres was taken as the study object, potential of CO₂ flooding for EOR and sequestration was researched and evaluated. Results show that eight oilfields are suitable for CO₂ miscible flooding and ten oilfields are suitable for CO₂ immiscible flooding. The predicted enhanced recovery efficiencies are about 12% and 6.5%, respectively. The expected cumulative oil production is 80 million tons with CO₂ storage of over 130 million tons.

Keywords: CO2; carbon dioxide; carbon flooding; carbon sequestration; enhanced oil recovery; EOL; minimum miscible pressure; China; low permeability; petroliferous basin; oilfields; immiscible flooding; carbon storage; oil production.

DOI: 10.1504/IJGW.2015.072663

International Journal of Global Warming, 2015 Vol.8 No.3, pp.436 - 451

Received: 11 Dec 2013
Accepted: 01 Jun 2014
Published online: 23 Oct 2015 *

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