For reservoir W58 a satisfactory oil displacement agent, 0.16%KPS+0.64%Na_2CO_3, has been selected by using this fast USI method together with standard IFT method and put into field trial successfully.
For reservoir W58 a satisfactory oil displacement agent, 0.16%KPS+0.64%Na_2CO_3, has been selected by using this fast USI method together with standard IFT method and put into field trial successfully.
Using the temperature resistance and salt tolerance polyme r oil- displacing agent and crosslinked agents developed by Zhongyuan oilfield, low polymer concentration and low crosslinked intensity AMPS copolymer oil-displ acing system have been carried out.