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In July 2017, under the evaluation system required by the Dagang Oil Production Institute, the external market team took into account the special situation of Dagang oil and water, and continuously optimized the formulation with the company's scientific research institutions. . The technical work was done carefully and substantially. Through a series of work, such as selection of base liquor and additives, optimization of proportions, the product formulation of the Kong-1 block was improved. This formula had obvious effect in tension, emulsification, washing oil and so on. It was approved by relevant professionals of Dagang Oil Production Institute, and successfully passed the series evaluation and implementation plan of Dagang Oil Production Institute. On July 12, the recovery injection of Kong-1 block was realized.