Rock matrix and fracture analysis of flow in western tight gas sands: 1986 annual report

Morrow, Norman R.; Buckley, Jill S.; Cather, Steven M.; Brower, K. R.; Dandge, V.; Graham, M.; Gonzales, B.

doi:10.2172/6105469

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“…In the absence of site-specific data, two-phase properties were based on data from actual measurements on roughly analogous materials. A "tight" gas sand core discussed in Morrow et al (1986) was selectedas an analogue materialto definethe relative-permeabilityand capillary-pressurecharacteristics of Marker Bed 139. The relative-permeability and capillary-pressure curves assumed for the simulations (Figures G-2 and G-3, respectively) are those used by Davies et al (1992) for sensitivity studies of gas pressurization in the WlPP repository and gas migration from the WlPP repository into interbeds.…”

Section: G3 Simulation Parametersmentioning

confidence: 99%

Hydraulic testing of Salado Formation evaporites at the Waste Isolation Pilot Plant site: Second interpretive report

Beauheim¹,

Roberts²,

Dale³

et al. 1993

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Pressure-pulse,constant-pressureflow, and pressure-buildup tests have been performed in bedded evaporitesof the Salado Formationat theWaste IsolationPilotPlant (WIPP) siteto evaluatethe hydraulic propertiescontrollingbrineflow throughthe Saiado. Transmissivitiesrangingfrom about 7 x 1015to 5 x 1013m2/shave been interpretedfromsix sequencesof testsconductedonfive stratigraphic intervalswithin 15 m of the WIPP undergroundexcavations. The correspondingvertically averaged hydraulic conductivitiesof the intervalsrange from about 1 x 1014to 2 x 1012 rn/s (permeabilitiesof 2 x 1021 to 3 x 1019m2). Storativitiesof thetested intervals;ange from about1 x 108 to 2 x 106, and valuesof specific storagerangefrom 9 x 108 to 1 x 10s m1, Porepressuresin eightstratigraphicintervalsrange from about 2.5 to 12.5 MPa, and appear to be affectedby stressrelief aroundthe excavations. Anhydriteinterbeds appear to be one or more orders of magnitudemore permeablethan the surroundinghalite, primarily becauseof subhorizontalbedding-planefracturespresentin the anhydrites. Interpretationsof the tests revealedno apparenthydrologic boundarieswithinthe radiiof influenceof thetests,whichwere calculated to range from about2 to 20 m from the test holes. An assumptionof Darcy flow throughthe evaporites is thoughtto be a reasonableinterpretiveapproachbecauseDarcy-flowmodelsare able to replicatethe flow and pressurebehaviorobserved duringentire testing sequencesinvolvingdifferenttypes of tests performedwithdifferenthydraulicgradients.

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Section: G3 Simulation Parametersmentioning

confidence: 99%