Use of a marked proppant during hydraulic fracturing allows for evaluation of the well operation during several years without extra expenses. The Paper describes the experience of placement of a polymer-coated marked proppant with different signatures for two hydraulic fracturing operations, penetrating into the top and the bottom of the productive formation by a vertical well. Hydraulic fracturing operation was performed in such a way that the hydraulic fractures made a single fracture, where two signatures of a marked proppant were placed.

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