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The picture above is showing the gas flow rate equipment hooked up and in operation.

History plot of the match of BU 7 and neighbouring periods with the BU 7 model.

History plot of the match of BU 9 and earlier periods with the BU 9 model.

Photo b

y: Geir Ov


DH5R Gas flow test and results

Between Oct 26, 2012 and Oct 26, 2013 gas has been bled off several times without rate measurements to retrieve the 
down-hole gauge and download data, and also three times during Aug 22-25, 2013 to record rates for use in analyses 
of flow and shut-in data. Although it is not known where the gas actually comes from, one can at least determine the 
properties of the formation with an assumed thickness and an assumed porosity as reference. This has been done 
based on a thickness of 20 m and a porosity of 10%. Moreover, it has furthermore been assumed that the gas consists 
of 90% methane and 5% each of ethane and propane at 30 bar and 24 ÂșC.

In rough terms, the recorded rates started at up to 2500 Sm3/d and declined towards 1600 Sm3/d over periods of 3-4 
hours. Results from analyses indicate an open-ended rectangle of width 25.5 m and length to the closed end just 4 m, 
with a permeability of 0.12 md and a slightly stimulated well. The formation pressure is 28.9 bar at the gauge depth 
of 645 m. The formation is under-pressured at a similar pressure regime to that of the Knorringfjellet Formation. 
Minimal length of the rectangle is 300 m based on available data.

A rate forecast based on the model above with 300 m to the most distant end yields a cumulative production of just 
under 100000 Sm3 after 1000 days with declining rates reaching 1000 Sm3/d at 1.4 days, 500 Sm3/d at 7.5 days, 200 
Sm3/d at 56 days, 100 Sm3/d at 246 days and 50 Sm3/d at 820 days. The data were generated with a flowing bot-
tom-hole pressure of 10 bar (at the gauge).