The optimization and economic evaluation of oil production using low salinity polymer flood: a case study for EOR 26

Abstract Trinidad and Tobago (TT) have been producing crude oil commercially since 1908. For the past few decades, TT’s production has in steady decline because most of reservoirs are beyond primary phase their production. This situation coupled with lower energy prices resulted a shortfall revenues presents TT major economic challenges. The objective this study was to optimize field simulation model combined Low Salinity Polymer Gel flood highlight possibility that Enhanced Oil Recovery (EOR) can boost especially from heavy reserves mature fields. A EOR 26 Upper Forest Sands built using CMG Builder software. Sand Reserve delineated by shale-outs, faults water–oil contacts. entire is bordered Fyzabad anticline its north-west Los Bajos fault south-west. dynamic flooding created STARS software optimum parameters polymer gel concentration, salinity concentration injection rates pressure for highest recovery were investigated. obtained 500 ppm 1000 an rate 900 bbls/day during continuous period 545 days. preceded pre flush water 180 days followed duration ten (10) year period. predicted project additional 14.52% OOIP considered economically feasible at price US$50 per barrel payback two years IRR 63.53%.