FIELD: oil and gas industry.
SUBSTANCE: method of formation watering determination in their mixture at joint or dual completion of formations includes sampling of each productive formation with product parameters determination, further sampling of produced mixture and its analysis. Ionic (chemical) composition of waters of each formation is determined in product parameters. Then in the course of their joint exploitation there measured is a recovery rate of each formation, general recovery rate and mixture watering. Chemical analysis helps to determine ionic (chemical) composition of water mixture and then it is used for calculation of each formation watering.
EFFECT: simplification of watering determination.
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