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The AAPG/Datapages Combined Publications Database

CSPG Special Publications

Abstract


Core Conference: CSPG-SEPM Joint Convention, with the Participation of the Global Sedimentary Geology Program and the Geol. Survey of Canada, 1997
Pages 237-256

New Discovery in the Montney Formation: “Sturgeon Lake South, Triassic F-Pool”, a Shoreface Sandstone Reservoir

Rita H. Polt, Federico F. Krause

Abstract

The “Sturgeon Lake South, Triassic F-Pool” is a new light oil and gas discovery in the Montney Formation which was identified by recognizing bypassed pay in an old well. Initial interpretation of the well’s logs indicated that the reservoir might be too shaly, but thin section work on cuttings showed that the interval was sandy and more feldspathic than shaly. Subsequent drilling confirmed that the reservoir is a quartzose, feldspathic and dolomitic, well sorted, very fine grained sandstone and medium to coarse grained siltstone which accumulated in a shoreface. The trap is a combination stratigraphic and structural trap with regional dip to the southwest. Hydrocarbons are light (37° API) and are trapped to the east along the reservoir’s subcrop edge and to the north by a fault. The extent of the pool to the west is poorly known because data is limited due to government drilling restrictions. Initial production rates of 330 BOPD are not uncommon, but long term rates stabilize at approximately 60 BOPD. Hydraulic fracturing is required to overcome formation damage and the formation’s overall low permeability. Average recoverable reserves per well are estimated to be in the neighborhood of 100,000 Bbls.


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