Application of Fluid Phase Recovery Method in the Early Development of BZ26-6 Volatile Oil Field in Bohai Sea

BZ26-6 Oilfield is a kind of deep metamorphic rock buried-hill volatile oilfield in Bohai Sea, China. Its early development plan restricted due to the simultaneous production oil and gas large sections reservoirs, unclear understanding formation fluid properties uncertainty gas-oil interface. Through theoretical research on phase recovery experimental analysis crude characteristics original formation, characteristic parameters equilibrium condensate are restored calculated. superimposed diagram gas, determined be reservoir with cap, pressure saturation 36.1 MPa, respectively. Based results oil-gas behavior characteristics, thermodynamic equations equation state jointly used solve problem, content change curves each component at different depths drawn. Combined sensitivity numerical simulation, interface -3726 m above sea level. The software, Fluidmodeler, simulate degassing separation experiments. In combination data obtained through test, specific index 0.408 m3/(MPa·d·m) 1195 m3/(MPa·d·m), And reasonable capacity prediction conducted Oilfield. can provide basis for efficient similar complex reservoirs.