Acid fracturing and hydraulic fracturing were used to stimulate and appraise a challenging deep, low-porosity carbonate reservoir with a complex combination of matrix background fractures and some large fault corridors and fault-associated fractures. The execution of the stimulations proved challenging because of the high strike/slip stress regime. Data from the prestimulation diagnostic tests was used to successfully plan and optimize each stimulation. Learnings and experiences for designing and execution of proppant fracturing, as an alternative to matrix or fracture acidizing in these complex carbonate formations, are presented.
Introduction
To date, five wells have been drilled in the appraisal field.
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