Determination of minimum near-miscible pressure during CO2 flooding in an offshore oilfield

2017 3rd International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Zhang, Xiansong^1,2 ; Chen, Hao^1,2 ; Li, Bowen^2 ; Yang, Guang^1 ; Shen, Xiong^2

State Key Laboratory of Offshore Oil Exploitation, Beijing

100027, China^1

Key Lab of Petroleum Eng. of MOE, China University of Petroleum, Beijing

102249, China^2

关键词: Compositional modeling;    Empirical equations;    Miscible flooding;    Offshore oilfield;    Slim tubes;    Upper boundary;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/108/3/032041/pdf
DOI  :  10.1088/1755-1315/108/3/032041

来源: IOP

【 摘 要 】

CO2near-miscible flooding was proposed for the development of the newly discovered offshore Qinhuangdao oilfield. However, different with miscible flooding, the near-miscible flooding corresponds to a region instead of a point (MMP). This paper focuses on the determination of the lower and upper boundaries of the near-miscible area. Based on the data of PVT test, a compositional model was established and fitted. Then slim tube simulation and empirical equation were conducted to obtain the minimum near-miscible pressure (MNMP). The results can provide valuable guidance for the effective development of the targeted offshore oilfield.