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- W2140702994 abstract "The Upper Devonian Slave Point Formation in north-central Alberta and British Columbia, Canada is an intermediate depth (2000-3500 m) bioclastic carbonate that holds an estimated 7 TCF gas in place (AEUB/OGC reserve statistics). Along the Hotchkiss Embayment trend [fig. 1] (TWP 90-110 W6) Slave Point oil and gas pools have been found episodically from 1955 to present, however, major field discoveries have been infrequent. Cranberry (595 BCF OGIP) (TWP 96-4W6) was drilled in 1974, followed by Hamburg (490 BCF OGIP) (TWP 9611W6) in1983. In the last seventeen years 570 Slave Point wells have been drilled in the Hamburg area but similar large hydrocarbon accumulations have remained elusive...until very recently. A field discovery was made in winter 2000 at Ladyfern, British Columbia (Block H-94H1) and early indications suggest that the volume and deliverability of the gas accumulation may surpass all previous finds in the area. Apache Canada Limited (37%), along with farm-in partners Murphy Oil Limited (33%) and Beau Canada (30%), drilled a deeper pool test (2790 m) in the Ladyfern area of northeast British Columbia in February, 2000 at A97H-94H1 [fig. 2]. The well was completed as a Slave Point gas well with a reservoir pressure of 4400 psi and a deliverability of 100 MMCF/D. The well has produced 12 BCF of slightly sour gas (5 ppm H2S, 4% CO2) in 9 months with no formation water. Three additional wells were drilled in 2000 to define the extent and continuity of the reservoir at 4-26-94-13 W6 (producing 7 MMCF/D), 10-19-94-12W6 (producing 1.5 MMCF/D) and B17I-94H1 (off bank). Aggressive follow-up drilling programs in 2001 by all Slave Point rights holders in the vicinity have resulted in the licensing of 45 locations and the drilling of 24 slave point tests. Apache/Murphy have drilled twelve of the new wells with a 100% success rate. Pressure gradient analysis, geological- and geophysical-data indicate that the Ladyfern Slave Point gas field is areally extensive, up to 100 sq kilometres, with gas column greater than 100 m, proven recoverable reserves of 300 BCF and possible reserves that may approach a trillion cubic feet of gas in place. Ladyfern Slave Point reservoir rock is leached, fractured and hydrothermallydolomitized bioclastic grainstone and packstone. Stromatoporoids and corals are the dominant mega-clasts. Porosity development is directly related to original depositional fabric and is diagenetically enhanced along zones of extensional faulting that parallel and crosscut the carbonate bank [Fig. 2]. The trap is stratigraphic/diagenetic and a seal is provided by tight Slave Point argillaceous limestones and overlying Beaverhill Lake shales. The rocks have a complex" @default.
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- W2140702994 date "2001-01-01" @default.
- W2140702994 modified "2023-09-24" @default.
- W2140702994 title "Ladyfern, N.E.B.C.: Major Gas Discovery in the Devonian Slave Point Formation" @default.
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- W2140702994 hasPublicationYear "2001" @default.
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