Numerical Simulation On Remaining Oil Distribution Affected By Muddy Lateral Accretion Layer

Through method of numerical simulation and application of the simulation softwareEclipse，this paper studies distribution characteristics of the residual oil saturation in sandbodies containing the non penetration muddy lateral accretion layer，after a certain period oftime with waterflooding development．We research the effect on waterflooding result ofdifferent muddy side laminated angle， spacing， permeability； study the effect onwaterflooding result of different wells network deployment，different water injection．Thenumerical simulation results show that：affected by lateral accretion layer，the remaining oil ismainly distributed in the upper layers；the farther the layers to muddy bodies，the higher thesaturation of the residual oil will be；the farther it to injection wells，the higher saturation ofthe residual oil will be．The greater of the muddy side laminated inclination，the greater of thespacing，the higher of the permeability，the water flooding result will be better；in themechanism models，the model of100t/d is the optimum injection rate，raising or lowering theparameters is not conducive to tapping the potential of remaining oil；the recovery of the wellrow perpendicular to the side of the laminated is higher than that parallel to the side of thelaminated；the rate of injection wells to production wells1:2is better than2:1．For reservoirswhich have bottom water for energy supply，in the initial developing stage of horizontalwells，the longer the horizontal section is，the lower the layers are，the higher the recovery willbe；in the later developing stage of horizontal wells，crossing one muddy layer，being obliqueto muddy layer，will add to the recovery．...