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REP 91

Regional Geological and Hydrogeological Characterization of the Calgary-Lethbridge Corridor in the South Saskatchewan Regional Planning Area

In partnership with Alberta Environment and Parks (AEP), the Alberta Energy Regulator/Alberta Geological Survey (AER/AGS) undertook a study in the Calgary-Lethbridge Corridor (CLC) area of southern Alberta to support the development and ... Show Abstract

Atkinson, L.A.  Liggett, J.E.  Hartman, G.M.D.  Nakevska, N.  Mei, S.  MacCormack, K.E.  Palombi, D.  2017-02-24

DIG 2018-0011

Groundwater Yield Continuum for Southern Alberta (GIS data, polygon features)

Groundwater Yield Continuum for Southern Alberta (GIS data, polygon features) The yield continuum classifies groundwater yield along a spectrum that helps define total groundwater availability. The classes within the groundwater yield continuum ... Show Abstract

Klassen, J.  Liggett, J.E.  2018-10-23

SPE 110

Calgary-Lethbridge Corridor Geophysical Survey: Interpretation of AeroTEM Airborne Data

The purpose of the survey was to map aquifers with electromagnetic imaging techniques. The data were processed by Aeroquest using a conductivity depth imaging (CDI) method called differential resistivity. The traverse and tie line Hz data were ... Show Abstract

Davis, L.  Groom, R.W.  2018-09-17

DIG 2018-0013

In-Situ Stress Measurements for the Duvernay Formation, Alberta (tabular data, tab-delimited format)

In-Situ Stress Measurements for the Duvernay Formation, Alberta (tabular data, tab-delimited format) Measurements of the in-situ stress directions and magnitudes at the level of the Duvernay Formation are reported from multiple sets of oriented ... Show Abstract

Shen, L.  Schmitt, D.R.  Haug, K.  2018-10-26

OFR 2018-09

First-Order Groundwater Availability Assessment for Southern Alberta

First-Order Groundwater Availability Assessment for Southern Alberta The aquifer yield results of this study can be used to assess potential, order of magnitude, regional groundwater yields and to compare relative differences between ... Show Abstract

Klassen, J.  Liggett, J.E.  Pavlovskii, I.  Abdrakhimova, P.  2018-10-23

SPE 111

Calgary-Lethbridge Corridor Geophysical Survey: Ground Time Domain Calibration Survey Data and Report for AeroTEM Airborne Data and Inversion

Calgary-Lethbridge Corridor Geophysical Survey: Ground Time Domain Calibration Survey Data and Report for AeroTEM Airborne Data and Inversion The purpose of the survey was to verify the accuracy of airborne time domain (AEM) data collected by ... Show Abstract

Groom, R.W.  Davis, L.  2018-09-17

MAP 032

Uppermost Cretaceous and Tertiary Strata of Central and Southern Alberta

The mapped formations are, from youngest to oldest: St. Mary River, Edmonton, Eastend, Willow Creek, Paskapoo, Ravenscrag, Porcupine Hills, Cypress Hills and Handhills. Place Keywords alberta canada 72e 72l 72m 73d 73e 72l 73m 82g 82h 82i 82j 82n ... Show Abstract

Carrigy, M.A.  1971-01-01

ESR 2002-04

Hydrogeology and Stress Regime of the Upper Cretaceous-Tertiary Coal-Bearing Strata in Alberta

Abstract: The coalbed methane potential and producibility of any coal-bearing strata are strongly affected by the hydrogeological regime of formation waters and by coal permeability, which in turn depends on the effective stress regime of the coal seams. Peat accumulated in the Alberta basin during the late Cretaceous and early Tertiary led to the formation of coal deposits in the Upper Cretaceous Belly River Group and Horseshoe Canyon Formation, and the Upper Cretaceous-Paleocene Scollard and Paskapoo formations. The flow of formation waters in these strata is driven by gravity (topography) and erosional rebound, and is controlled by rock absolute permeability, gas generation and capillary pressure to gas (relative permeability). The permeability of coal seams decreases west-southwestward with increasing burial depth, from the order of several darcies (D) and higher in the shallow (<50 m) zones, to millidarcies and less in the deep zones (>1500 m). The minimum effective stress, which affects coal permeability by closing fractures, increases west-southwestward from zero at the erosional edge of the strata to approximately 20 MPa near the Rocky Mountain deformation front. Fractures, including those in coal seams, will generally be vertical, and will propagate on a southwest-northeast axis along the direction of the maximum horizontal stress. The flow of formation waters indicates that the coalbed methane in deep coal seams in west-central Alberta (Edmonton and Belly River groups) is most likely of thermogenic origin. The gas content of the coal may be quite low, as the underpressuring caused by erosional rebound could have drawn the gas out of coal into the adjacent sandstone units where it has accumulated in stratigraphic traps created by a changing depositional environment. The coalbed methane in shallower coal in and near the subcrop regions of the Upper Cretaceous-Tertiary strata is probably of thermogenic and biogenic origin. These coals seam, although of low rank, may contain significant amounts of late-stage biogenic methane. From the point of view of produced water, the salinity of formation water in shallow coal seams, where the flow is driven by topography, is low, generally less than 1500 mg/l, although in places it may react 3000-5000 mg/l. The salinity of the formation water in the deeper strata in west-central Alberta, where the flow is driven by erosional rebound, is significantly higher, reaching up to 18 000 mg/l. This affects treatment and/or disposal strategies with regard to the water produced concurrent to coalbed methane. From a strictly hydrogeological and permeability/stress regime point of view, the region that probably has good CBM potential and producibility from coal seams in the Upper Cretaceous-Tertiary strata of the Alberta basin extends from the west-northwest, at the top of Scollard-Paskapoo succession, to central and southern Alberta, along and near the subcrop area of the stratigraphically deeper Edmonton and Belly River groups. The deep Edmonton and Belly River strata in western and central Alberta most likely have a reduced CBM potential due to possibly lower gas content and low permeability. These considerations need to be applied against studies of coal thickness, rank and gas content top identify the best targets for CBM exploration and production in Alberta. Place Keywords 72e 72l 72m 73d 73e 73l 73m 82g 82h 82i 82j 82n 82o 82p 83a 83b 83c 83d 83e 83f 83g 83h 83i 83j 83k 83l 83m 83n 83o 83p Theme Keywords coal hydrogeology tertiary

Bachu, S.  Michael, K.  2002-10-01

OFR 2017-07

First-Order Groundwater Availability Assessment for Central Alberta

First-Order Groundwater Availability Assessment for Central Alberta The aquifer-yield continuum classifies groundwater yield along a spectrum that helps define total groundwater availability and is bound by two extremes: non-use and maximum ... Show Abstract

Klassen, J.  Smerdon, B.D.  2018-02-14

DIG 2016-0032

Calgary-Lethbridge Corridor Hydrostratigraphic Model - Top of the Pakowki / Upper Lea Park Hydrostratigraphic Unit, Southwestern Alberta (gridded data, ASCII format)

Calgary-Lethbridge Corridor Hydrostratigraphic Model - Top of the Pakowki / Upper Lea Park Hydrostratigraphic Unit, Southwestern Alberta (gridded data, ASCII format) Bedrock units included in the CLC model are derived from the Geological Framework ... Show Abstract

MacCormack, K.E.  2017-03-29

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