Calculation method and device for water saving

Abstract

The invention discloses a water-saving amount calculation method and device, belonging to the field of oil field production. The method includes: obtaining a first unit of water injection; obtaining a second unit of water injection; obtaining a first production; obtaining a correction coefficient, and the correction coefficient is used to adjust the first unit according to the production decline of the oil field to be evaluated. The water injection amount is corrected; according to the first unit water injection amount, the first output, the second unit water injection amount and the correction coefficient, the water saving amount for the development of the oilfield to be evaluated in the report period compared with the base period is calculated. The invention is used for calculating the water-saving amount, which makes the calculation of the water-saving amount more scientific and can reflect the performance of the oilfield water-saving work.

Description

Technical field[0001]The invention relates to the field of oilfield production, and in particular to a method and device for calculating water saving.Background technique[0002]After the oil field is put into production, with the continuous production of crude oil, the energy of the oil reservoir itself will continue to be consumed, resulting in a decrease in the total liquid storage of the reservoir and a continuous drop in pressure. The drop in reservoir pressure will cause a large amount of degassing of underground crude oil and viscosity. The increase has greatly reduced oil field production. In order to maintain or increase the trap pressure of the reservoir and realize the high and stable production of the oil field, it is necessary to inject water into the reservoir. Among them, in addition to injecting treated oil production wastewater into the oil reservoir, it is also necessary to inject a certain amount of industrial fresh water into the oil reservoir. In addition, other p...

AI Technical Summary

Problems solved by technology

[0005] In the process of oil field production, with the extraction of crude oil, more water needs to be injected to ensure the stable production of the oil field, that is, to obtain the same quality of product needs to consume more fresh water, which is the rigid demand for water injection in the oil field. Calculation of oilfield water saving using the method cannot remove the impact of the oilfield’s rigid demand for water injection on water saving, that is, even if oilfield production implements a large number of water-saving technical measures, it can only maintain a slight reduction in the fresh water consumption index of the production unit quality product or remain unchanged, the oilfield water saving calculated by the product unit consumption method is extremely small, or even negative, which cannot accurately reflect the oilfield's water saving work performance

Therefore, the applicability of using the product unit consumption method to calculate oilfield water saving is not strong

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