Open AccessDiscussion on Reasonable Well Spacing of Polymer Flooding in the Second Class Reservoir of Lamadian Oilfield
Author(s) -
Xiaohu Dai
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/651/3/032060
Subject(s) - flooding (psychology) , petroleum engineering , block (permutation group theory) , geology , environmental science , hydrology (agriculture) , geotechnical engineering , mathematics , geometry , psychology , psychotherapist
Lamadian Oilfield entered the development stage of polymer flooding in the second-class reservoir in 2006. At present, 8 blocks of well distribution schemes have been compiled and 6 blocks have been put into production by perforation. From the well spacing adopted in the polymer flooding development block of Class II reservoir and the polymer flooding test area of Sa iii 4-10 reservoir in La’nan Area 1, the injection-production well spacing is mainly 106 m ~ 212 m. According to the current development effect of each block, the well spacing of each set has certain inadaptability. Therefore, this paper, on the premise of guiding the preparation of well distribution plan in Area 2 of Middle East Block of La’nan, discusses the reasonable well spacing of polymer flooding in the second class reservoir from the aspects of control degree of polymer flooding, well pattern density, single well controlled reserves and so on. Combined with the actual situation of the implemented polymer flooding block, it is concluded that when the injection-production well spacing is 150m, it has about 80% polymer flooding control degree for the second-class reservoir, which can ensure reasonable well pattern density and single well controlled reserves, and obtain higher recovery ratio and economic benefits.