Petro Vietnam Journol Vol 06/2020 with the situation Prediction of thermodynamic properties of petroleum and refinery gases using PC-SAFT+FVT model; Optimising the under-reamer string design for wells at Hai Thach field, Nam Con Son basin; Calculating precise water saturation with hydraulic flow unit using leverett’s j-function. a case study of field a, Cuu Long basin, offshore Vietnam . | Petro Vietnam Journol Vol 06 2020