A Study On The Remaining Oil Distribution Of Block A In Xingshugang Oilfield

In this paper, the recent studying situation and research methods about remaining oil in domestic and foreign were investigated, and the development state of block A in Xingshugang Oilfield was analyzed, and the properties of all kinds reservoir was described. Based on the theory of reservoir numerical simulation, after analysis on the geologic data of Xingshugang Oilfiled, the tendency interpolation method was adopted to build parameters filed with NTG permeability porosity, and so on. Reference the distribution of fluid units, amending the parameter to construct a geologic model. According to the model, the history matching indexes were fixed and carried. Indexes include initial reserves BHP WWCT formation pressure and region water cut, and so on.Using the model obtained by matching and modifying, the distribution of remaining oil in this block was determinated. The research result shows that, the developing degree of reservoir is defferent from each other, and the distribution form of remaining oil is defferent from each other also. Most of remaining oil is distributed at the location where the injection-production system of main reservoir is not perfect and where is the dead oil block of non main reservoir.On the condition that history matching was finished successfully, three plans were designed for prediction. As follow:1 .Remain using the current work system to produce.2.Adjust the well pattern for injection and produce.3.Drill infilling wells.Comparing the prediction results and integrating the economic evaluation, the net earning investment payback time and internal rate of return were calculated when water cut reached 98%. Comparing the economic efficiency of three plans at present oil price shows: the third plan's net earning is better than the other two's.