Optimization Method Research On Reservoir Parameter Interpretation In SZ Thinand Low Productivity Development Region

Daqing laSaXing oil field is a large river-delta sedimentary reservoir with multiple layers, high thickness and great heterogeneities. When the oil field development enters into high water cut period, the remaining oil distributes quite differently in space. To improve oil recovery efficiency by water flood and EOR technology, it is necessary to accurately describe remaining oil distribution. Therefore, the technique to optimize reservoir parameter interpretation is needed, especially in thin and low productivity reservoirs; but the technique is still not mature yet. In SZ development zone, the oil reserves of thin and low productivity reservoirs can reach over 300 million tons, accounting for 40% OOIP. With the measurement of infilling adjustment, oil recovery by water flood is 44.4% and recovery percentage is 29.7%, indicating that development potential is still considerable. However, the present technique cannot meet the needs of reservoir parameter interpretation in thin and low productivity reservoirs, so it is very essential to perform the study on reservoir parameter interpretation. On the basis of great investigation and study on domestic and international technical documents and research results, the paper offers optimized method of reservoir parameter interpretation, which has taken use of the information in terms of core data, logging test of infilling pattern, geological data and so on. The innovative techniques include water-out reservoir interpretation technology in thin and poor productivity region, parameter evaluation, water-out reservoir interpretation technology based on permeability data, permeability emendation technology, untalented reservoir parameter interpretation technology and etc. The research results have been applied into SZ development region, making the technique more practical and perfect, and significantly promoting the development and application of geological model building and reservoir simulation, which provides the basis for development analysis, project programming and other work. The research results obtained from the paper enrich well logging interpretation methods and they are essential supplements for the research in relative fields both at home and abroad.