Int. J. of Global Warming   »   2016 Vol.9, No.2

 

 

Title: Technical feasibility and application effect of coupled CO2 sequestration and EOR in tight sandstone oil reservoir

 

Authors: Changlin Liao; Xinwei Liao; Wanglai Gao; Jing Chen; Huan Wang

 

Addresses:
PetroChina Research Institute of Petroleum Exploration and Development, 102249, China; Petroleum Engineering Department, China University of Petroleum, 269 Changping, Beijing 102249, China
Petroleum Engineering Department, China University of Petroleum, 269 Changping, Beijing 102249, China
Petroleum Engineering Department, China University of Petroleum, 269 Changping, Beijing 102249, China
Petroleum Engineering Department, China University of Petroleum, 269 Changping, Beijing 102249, China
Petroleum Engineering Department, China University of Petroleum, 269 Changping, Beijing 102249, China

 

Abstract: This paper focused on the technical researches on CO2 sequestration and enhancing oil recovery by CO2 flooding. Experiments and numerical reservoir simulation were conducted to study the technical feasibility and application effect of implementing CO2 sequestration and EOR in tight sandstone oil reservoirs. Small maximum pore throat radius, inefficient mercury withdrawal and large residual volume in pore together implied that the bad connectivity among pores would result in high percolating resistance in reservoir. Several conclusions were obtained at last - the physical properties of the oil are favourable for conducting CO2 sequestration and EOR; miscible flooding performs better than immiscible flooding; CO2 sequestration and EOR are easier to be implemented in the reservoirs with preferable homogeneity. A technology combining WAG with profile modification was adopted to maximise the ability of CO2 injection and oil-producing for single well so that the benefit of CO2 sequestration and EOR can be improved more efficiently.

 

Keywords: CO2 flooding; carbon dioxide; carbon sequestration; enhanced oil recovery; EOR; tight sandstone oil reservoirs; net present value; NPV; global warming; technology; numerical simulation; pore throat radius; mercury withdrawal; residual volume; pore connectivity; percolating resistance.

 

DOI: 10.1504/IJGW.2016.074954

 

Int. J. of Global Warming, 2016 Vol.9, No.2, pp.177 - 197

 

Available online: 26 Feb 2016

 

 

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