Application of “sedimentary facies controlled sand body” theory in remaining oil tapping of sandstone reservoirs with bottom water in the Tahe Oil Field

The sandstone reservoirs with bottom water in the Tahe Oil Field belong to plains of braided river facies. We studied the connectivity between channel and channel bar sand body based on the "sedimentary facies controlled sand body" theory and combined with intercalation distribution and its relationship with micro facies. By using numerical simulation, we analyzed the influence of sand body superimposition on water flooding mode and remaining oil distribution, which could guide remaining oil potential tapping during high water-cut stages.