Oil-water relative permeability symptom processing method based on reservoir physical property

Abstract

The invention provides an oil-water relative permeability symptom processing method based on reservoir physical property. The method comprises the following steps: selecting oil-water relative permeability curve data measured by a multi-strip laboratory and capable of reflecting area or reservoir physical property; establishing a function relation of the oil-water relative permeability curve characteristic parameter as well as air permeability and porosity of a rock core sample, performing standardization processing on the water content saturation, oil content saturation, water-phase relativepermeability and oil-phase relative permeability; respectively establishing a power function relation of a standard water phase, the oil-phase relative permeability, the water content saturation, andthe oil content saturation, establishing a function relation of a power exponent as well as air permeability and porosity, and using different reservoir physical property data to obtain the differentoil-water relative permeability curves. The method establishes the base for deduction of a calculating method for oil reservoir engineering, an oil-water displacement theory and oil reservoir value simulation by taking regard of seepage heterogeneity, accurately predicts the oil-water displacement exploitation effect and trend, and guides the oil field exploitation and production practice.

Description

technical field [0001] The invention relates to the technical field of oilfield development, in particular to a method for characterization and processing of oil-water relative permeability based on reservoir physical properties. Background technique [0002] The oil-water relative permeability curve is a comprehensive reflection of the oil-water two-phase seepage characteristics in rock pores, and is the most basic rule followed by the oil-water two-phase seepage process. The oil-water phase permeability curve is an important data in the prediction of oil production in reservoir engineering. Effective characterization and processing of oil-water relative permeability curves has important guiding significance for optimizing oilfield development plans, increasing oil recovery, and improving oilfield development effects. [0003] At present, for the oil reservoir of a specific block or unit, the laboratory has to do the oil-water relative permeability curve experiment of seve...

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Problems solved by technology

[0003] At present, for the oil reservoir of a specific block or unit, the laboratory has to do the oil-water relative permeability curve experiment of several core samples. For the convenience of data use, the traditional method is to use simple arithmetic An average oil-water relative permeability curve is obtained on average as the oil-water relative permeability curve of the entire block or unit, so that the oil-water relative permeability data at different positions in the reservoir are the same, ignoring reservoir heterogeneity The influence of oil-water relative permeability on the oil-water relative permeability curve and reservoir development cannot fully and objectively reflect the real situation of the oilfield, which affects the optimization of oilfield development plan and the improvement of ultimate recovery

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