| 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. 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. Firstly, based on laboratory core tests of oil swept by water and water swept by oil, the study on reservoir Archie parameter is conducted to establish well logging test interpretation model with current oil saturation; Secondly, the logging interpretation equation with respect to the water cut of the reservoir is obtained, taking use of physics theory of the reservoir and core test results of electricity parameter and relative permeability; Thirdly, on the basis of well logging curves, the distinguishability is improved by deconvolution, resistivity and other techniques, and value selection for different formations can be automatically completed by computer with active methods; Fourthly, the core data and well logging information are applied to set up the mathematic model in terms of reservoir porosity and other basic parameters. Meanwhile, combining with well logging interpretation model with current oil saturation and interpretation equation of water cut, the interpretation criteria for water-out formations and parameters has been achieved; finally, the interpretation software for thin and low productivity zones and single well is developed.
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