Open AccessQuantitative analysis of the influence of pore structure parameters on remaining oil after polymer flooding based on digital network model
Author(s) -
Huifen Xia,
Siqi Zhang,
Lihui Wang,
Lili Jiang,
Tingyuan Yang
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/651/3/032005
Subject(s) - saturation (graph theory) , petroleum engineering , polymer , materials science , enhanced oil recovery , chemical engineering , composite material , geology , engineering , mathematics , combinatorics
There is still a large amount of remaining oil in formation after polymer flooding. Therefore, it is of great significance to clarify the factors affecting the distribution of remaining oil to further improve the oil recovery. By constructing a digital pore network model, this paper considers pore structure factors and simulatetes oil displacement efficiency after water flooding and polymer flooding. It simultaneously analyzes their influence of pore structure parameters on remaining oil and quantitatively characterizes the coordination number, shape factor, pore-throat ratio affected on pore-throat oil content ratio and oil saturation ratio. Evaluate the influence of the above factors on the remaining oil distribution after polymer flooding. The research results show that: the more coordination number, the larger the shape factor. However, other structural parameters, such as pore-throat ratio, the number of pore-throat oil content, the pore-throat oil saturation ratio and the probability of forming remaining oil, is smaller at the same time.