Effect Analysis and Recognition of 2-D Black Nano-SHEET in Different Karst Reservoirs in Tahe Oilfield

Due to the long-term development of water and gas injection in Tahe Oilfield, production increase effect decreases year by year. Based on understanding treatment difficulties stage fractured vuggy reservoir this paper combined with theoretical analysis Nano-sheet technology at stage, such as super amphiphilic interface performance, emulsification viscosity reduction ability, ultra-low core adsorption, oil washing has carried out field application 2-D black nano-sheet displacement Oilfield for a total 15 wells. Through evaluation comparison well groups different inter-well types karst spaces after Nano-sheet, it is found that good connectivity composed weathered crust underground river space had high degree effectiveness. It best-selected area application. The mine receiving efficiency was 85.7%, significant, cumulative more than 5000 tons. provides practical guidance basis follow-up Oilfield.