SPONTANEOUS IMBIBITION MECHANISM OF FLOW THROUGH POROUS MEDIA AND WATERFLOODING IN LOW-PERMEABILITY FRACTURED SANDSTONE RESERVOIR

The fluid flow properties and mechanism of fluid flow in low-permeability reservoir with fractured sandstones are complicated.The spontaneous imbibition of water is very important for oil recovery.The influencing factors on spontaneous imbibition include rock size,rock properties,fluid properties,wettability,initial oil saturation and boundary condition,etc.The affecting degrees of those factors were investigated by the spontaneous imbibition experiment in laboratory,NMR technology and displacement test.The study results may provide some theoretical bases for oil development of low-permeability reservoir with fractured sandstone.