METHOD OF DETERMINING RESERVOIR PRESSURE
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United States of America Patent
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Issued Date -
Jan 7, 2016
app pub date -
Sep 17, 2015
filing date -
Dec 16, 2010
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Abstract
A well test method for use in tight gas reservoirs prior to hydraulic fracture stimulation. The method can use injection of water using low-rate surface pumps into the reservoir below parting pressure. The measured rates and pressures are converted to sandface rate and pressure datasets for each stage. The technique can utilize either surface or bottom-hole pressure sensors. The resulting sandface datasets are analyzed using the baseline/calibration method or other analysis appropriate to stage data to determine reservoir flow properties. The small-volume, staged well test enables estimation of the flow properties of reservoir, including pressure and permeability, in hours rather than days.
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