Oil-Water Well Production Splitting Method Based on Injection-production Balance Principle

Abstract

The present invention proposes a production split method of oil and water wells based on the principle of injection-production balance, comprising the following steps: step S1, collecting oil and water well data, and establishing a database of oil and water wells; Coefficient; step S3, calculate the water content of the small layer of the oil well; step S4, calculate the oil production and water production of each small layer of the oil well according to the calculation results of the steps S2 and S3, and save them together. The method of the present invention takes the development block as the unit and the water injection well as the center by comprehensively considering various geological factors, divides the water injection volume of the water injection well, the oil production volume of the oil well, and the water production volume, and splits the production volume of the oil well and the water injection volume of the water well. In time-sharing, firstly, the non-absorbent layer is screened out, so that the result of splitting the water injection volume 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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