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J.E. Bartuska, J-W Energy Company; J.J. Pechiney, R.S. Leonard, R.A. Woodroof, ProTechnics
Division of Core Laboratories
In horizontal shale completions, one of the primary goals is to maximize contact
with the most reservoir rock and effectively drain the complex fracture network
that has been created during the stimulation process. This paper covers a five-well
case study in the Marcellus Shale where completion diagnostics were used to evaluate
and optimize the completion process. The case histories will detail key completion
parameters and how they changed over time based on various diagnostic results.
Completion diagnostics such as proppant and fluid tracers can be integrated with
production, stimulation and geologic data to provide useful information as to the
effectiveness of the completion design. Proppant tracers have been utilized in horizontal
shale basins throughout North America to evaluate near-wellbore fracture initiation,
identify un-stimulated perforations, and evaluate proppant interference between
stimulated wellbores. Fluid tracers are currently being used to analyze lateral
clean-up over time and to quantify fracture fluid interference between wells.
In this case study, these diagnostic technologies were instrumental in addressing
several completion design questions. Proppant tracers were used to evaluate cluster
and stage spacing and also identified proppant interference with adjacent wells.
Fluid tracers were utilized to evaluate overall load fluid recoveries for various
wellbore trajectories and helped quantify the source and amount of interference
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