Feasibility Study of Polymer Flooding in Widuri Oilfield

doi:10.11885/j.issn.1674-5086.2013.10.16.06

Abstract

Abstract:

Aiming at the conditions of high water cut，poor water injection effect of the sand body and the decline of output，
we study the feasibility of polymer flooding in Widuri Oilfield in the paper. The polymer system and the well injection group
are selected with the method of core test and numerical simulation. The performance evaluation experiment proves the selected
polymeric system to meet the requirement of the oilfield polymer displacement，and the ultimate recovery can be enhanced
by 21%∼25% after the polymer flooding，which is a desirable displacement effect. With the help of the numerical simulation
results，the displacement project is designed，and the ultimate recoverable reserve by water flooding is 197.9×104 bbl，but
for polymer flooding is 221.5×104 bbl，which can enhance the recovery of 6.36%. Widuri Field is successfully supported by
polymer flooding，decreasing oil production decline rates，and effectively improving oil recovery rates，and hence yielding
substantial economic benefits for CNOOC Southeast Sumatra PSC.

Key words: Widuri Oilfield, later period of extra high water cut, polymer flooding, EOR, numerical simulation

Tang Donglin*, Sun Pengxiao, Meng Weibin, Qian Shenhua. Feasibility Study of Polymer Flooding in Widuri Oilfield[J]. 西南石油大学学报(自然科学版), DOI: 10.11885/j.issn.1674-5086.2013.10.16.06.

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