| At present,there is not a set of method for evaluating oil increase by water flooding characteristic curve for heavy oil activated water flooding in offshore oilfields.In this thesis,the performance of heavy oil activator is evaluated through laboratory tests,and the effect of injection end is evaluated from the aspects of apparent water absorption index,Hall curve,relative water absorption ratio and pressure drop test curve.From the perspective of the overall production performance analysis of the production well,the evaluation of single well effect,the analysis of the concentration of production agent,the evaluation of the development effect of the production end,from the injection end and the production end,the heavy oil activated water flooding is effective.M area by SZ36-1oilfield pilot test area of the actual geological model,considering the different crude oil viscosity,the numerical model is set up,get the corresponding production data,water flooding oil production is obtained by calculating water drive characteristic curve,resulting in heavy oil activation water drive oil,with the analog computation increased amount of oil,so as to select the appropriate amount of water flooding characteristic curve to predict increased oil.In terms of oil increase evaluation,according to the selection result of water drive characteristic curve,monthly oil production error and recent trend,the theoretical water drive characteristic curve method is selected for evaluation.In addition,the decline method and numerical simulation method are used to calculate the oil increase as a reference.At present,the evaluation method of oil increase is based on water flooding characteristic curve method.By the end of June 2021,the oil increase has reached 2.26×10~4m~3.The selection method of water flooding characteristic curve proposed in this thesis provides a theoretical basis for the evaluation of oil increment by activated water flooding in offshore oil fields and has certain guiding significance. |
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