Abstract

This study presents an approach to optimize the design of hydraulic fracture treatments in the low permeability area of the Lower Miocene sandstone reservoir in the Cuu Long Basin of Southern Vietnam. Six major design variables were influenced by the fracture length, which enhanced oil production when the fracture length was maximized. Thus, the fracture length was analyzed using the central composite face design based on statistical modeling, which is an experimental design for response surface methodology. The results showed that the maximum fracture length was obtained at 828 ft under the injection rate of 30 bpm with an injection time of 79 minutes. The slurry concentration at the end of the job was 8.6 ppg, the leak-off coefficient was 0.0023 ft/min0.5, and the ratio between the fracture height migration and pay zone height was 1.065.

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