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A.V. Munoz, Pemex; M. Asadi, SPE, and R.A. Woodroof, SPE, ProTechnics; and R. Morales, SPE, O’Jeito
Chemical frac tracing is used to evaluate flowback and cleanup efficiencies for eight different wells in a field located Central America. The technique utilizes a family of unique, environmentally-friendly, fracturing fluid compatible chemical tracers to quantify segment-by-segment recovery for individual fracturing treatments and stage-by-stage recovery for multi-stage fracturing treatments. Each well was traced with a number of different tracers during hydraulic fracturing. Upon flowback, samples were collected and analyzed for tracer concentrations. With the use of the mass balance method, total flowback and flowback efficiency for each stage were calculated. Production for each well was closely monitored for three years. This paper presents in-depth details relating short-term total flowback and fluid stage-by-stage flowback efficiencies to the long-term post-frac performance.
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