METHOD FOR EVALUATING DOWNHOLE GAS INFLOW RATES DURING MULTISTAGE HYDRAULIC FRACTURING

摘要

The invention relates to the oil and gas extraction industry and can be used to monitor exploitation of a productive formation. The method includes producing a fluorescent marker in the form of polymer microspheres, with preparation of a dispersion of resin and luminescent substances, combining the produced marker with a carrier, which can be fed into a well, introducing the marker with said carrier into the well, collecting samples from the well and analysing said samples, with determination of the codes and amount of markers in the samples, which constitute a polymer membrane, by using flow cytometry, and determining the downhole fluid inflow rates on the basis of the results of said analyses. The invention makes it possible to obtain reliable results when determining downhole gas inflow rates during multiphase flow of formation fluid.