The Research on Distribution of the Remaining Oil in Heavy Oil Reservoir of BQ57

The BQ57 block is structurally located in the sag part of Biyang, the northern slopes. Reservoir is buried shallow, thickness thin and oil viscosity is high. With the old wells production factor decreasing, the remaining oil distribution is getting more and more complex, the block has a downward trend in production capacity. In this text, we longitudinally divided the BQ57 block into several emulation layers, horizontally divided into grids, established the block reservoir numerical model using the reservoir numerical simulation software, fit the daily fluid production, daily oil production, water cut, diurnal injection of this block, and the single well production history by adjusting the model parameter values, which the fitting error of each index were all within 2%[1,2]. On the basis of the results of numerical simulation, statistical analysis the remaining oil distribution and reserves abundance condition, clarify the regularities of distribution of the remaining oil, so that we can effectively produce the remaining oil, and it has an important significance for improving the recovery rate in oilfield.