Abstract
Abstract The petroleum industry is focusing on cost reduction and efficiency more than it ever had. Slimhole drilling and completion technology offer significant cost reduction potentials to the oil and gas industry. To provide an insight into slimhole technology, production, stimulation, conformance, perforation, tools, and testing aspects of reservoirs with wellbore diameters from 4- to 10-in. and tubing IDs from 1.25- to 4-in. are detailed here. Productivity of both vertical and horizontal slimhole wells, with and without hydraulic fractures, is compared with wells having standard wellbore sizes, Also provided are comparisons of wellbore hydraulics, including nodal analysis, minimum gas rates required to lift fluids off the well, and friction pressure losses occurring inside tubings. Furthermore, the effect of wellbore diameter on transient pressure testing, as well as on coning and cresting aspects of slimholes are detailed. The performance of slimhole wells compares favorably to standard wellbore completions for the parameters investigated in this study.
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