The Physical Experiment of Displacement in an Offshore Fluvial Heavy Oil Reservoir

X oilfield is an offshore fluvial facies heavy oil field. Due to the small platform space, it is different from the development and production methods of onshore oilfield, and it has long-term high intensity injection-production development. However, due to the strong heterogeneity of the reservoir and the large ratio of water to oil mobility, the water channeling of injected water is serious, and the water drive effect is gradually getting worse, so it is urgent to carry out the research of water injection well profile control and drive technology. For X oilfield, oil displacement effect analysis of weak gel and nano microsphere was carried out. Polymer microsphere mainly improves oil recovery through profile control and has good effect. The double pipe parallel displacement experiment shows that the weak gel can improve oil recovery and profile. The 2D plane model displacement experiment proves that the weak gel and polymer microsphere can improve the heterogeneous reservoir and enhance the oil recovery. This physical experiment provides guidance for polymer flooding in offshore fluvial heavy oil fields.