Oil-water well yield splitting method of injection-production balance principle

Abstract

The invention provides an oil-water well yield splitting method of an injection-production balance principle. The oil-water well yield splitting method comprises the following steps: step S1, collecting oil-water well data and establishing an oil-water well database; step S2, calculating a fluid production amount of an oil well and a water injection amount splitting coefficient of a water injection well; step S3, calculating a single-layer moisture ratio of the oil well; and step S4, calculating the oil production amount and water production amount of the oil well according to calculation results of the step S2 and step S3, and gathering and storing. According to the method provided by the invention, a plurality of geological factors are comprehensively considered, and the water injection amount of the water injection well, and the oil production amount and water production amount of the oil well are split by taking a development block as a unit and the water injection well as the center; and in a process of splitting the yield of the water injection amount and the water injection amount of the water well, a non-water-absorbing layer is identified and eliminated and the splitting result of the water injection amount is more accurate.

Description

technical field [0001] The invention relates to the technical field of oil wells, in particular to an oil-water well production splitting method based on the principle of injection-production balance. Background technique [0002] At present, when splitting oil (water) well production (water injection), it is generally only for individual wells. In the process of production (water injection) splitting, the main factors considered are thickness, permeability, relative permeability The effect of splitting results, in fact, in the process of reservoir development, there are many factors that affect the water injection rate and liquid production rate of water-injected sandstone reservoirs. The principle of injection-production balance and energy balance, that is, when the amount of injected water is greater than the amount of produced liquid, the formation pressure rises, and when the amount of injected water is less than the amount of produced liquid, the formation pressure dec...

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Problems solved by technology

[0002] At present, when splitting oil (water) well production (water injection), it is generally only for individual wells. In the process of production (water injection) splitting, the main factors considered are thickness, permeability, relative permeability The effect of splitting results, in fact, in the process of reservoir development, there are many factors that affect the water injection rate and liquid production rate of water-injected sandstone reservoirs. The principle of injection-production balance and energy balance, that is, when the amount of injected water is greater than the amount of produced liquid, the formation pressure rises, and when the amount of injected water is less than the amount of produced liquid, the formation pressure decreases; at the same time, because the reservoir is affected by sedimentary facies, the reservoir plane and There are differences in heterogeneity in the vertical direction, so the injected water and produced fluid generally have an injection-production and energy balance. The difference of the water injection volume makes the result of splitting the water injection volume inaccurate

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