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154

Milk River Reservoir Analysis

Monchy, SK and Bowdoin, Montana

RPCL

CPMR

October 2005

Play(s):
N/A
Fluid(s):
Gas
N/A
Area:
Monchy, SK and Bowdoin, Montana
N/A

The Milk River reservoir in the Monchy-Bowdoin area has low to fair permeability and has produced mainly water, mud and gas-cut mud from drillstem tests. Only one DST flowed gas to surface. Production tests for the Milk River often produced formation water after fraccing. Pressure data was sparse, but indicated that the Milk River is a dynamic aquifer that is connected to the regional flow system. As such, it is not part of the underpressured regional low permeability gas system that contains the Hatton, Suffield and Abbey-Shackleton fields. The Milk River in the Monchy-Bowdoin area is a conventional reservoir, and gas should be trapped within structures and stratigraphic pinch-outs with normal downdip fluid contacts. The head map showed that the direction of water flow in the aquifer is from the northwest to southeast. Water is likely being recharged into the Milk River aquifer from outcrop around the Sweetgrass Arch. The dynamic nature of the aquifer requires that gas/water or oil/water contacts be tilted and some low structures will be flushed, depending on the intensity of the flow.