Case History of a Supplemental Natural Water Drive; Stettler D-2 Pool
- R.K. Craig (The British American Oil Co. Ltd.) | W.R.E. Lozanski (The British American Oil Co. Ltd.)
- Document ID
- Petroleum Society of Canada
- Journal of Canadian Petroleum Technology
- Publication Date
- December 1963
- Document Type
- Journal Paper
- 182 - 190
- 1963. Petroleum Society of Canada
- 5.5.2 Core Analysis, 5.2.1 Phase Behavior and PVT Measurements, 4.2 Pipelines, Flowlines and Risers, 3 Production and Well Operations, 6.5.2 Water use, produced water discharge and disposal, 2 Well Completion, 1.6 Drilling Operations, 1.2.3 Rock properties, 5.2 Reservoir Fluid Dynamics, 4.6 Natural Gas, 5.6.5 Tracers, 2.1.1 Perforating, 1.13 Casing and Cementing
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The Stettler D-2 (Nisku) pool is located in Township 38, Range 20, west ofthe fourth meridian, and, as shown in Figure 1, lies approximately 140miles southeast of Edmonton, Alberta. The pool was discovered in 1949 by thedrilling of Canadian Gulf N.J. Ellis No.4, located in Lsd. 4-10-38-20 W/4.Deepening of this well led to the discovery of the D-3 pool, in which the wellwas initially completed. Figure 2 is a plan view of the location of theD-2 reservoir relative to the D-3 reservoir.
Development of the D-2 pool since 1949 has established a productive area of5,970 acres, defined by ninety commercial wells and approximately twenty dryholes. The pool has a length of five miles, a breadth of three miles and agross pay thickness of up to 108 feet, with a pool average of 63 feet. Theaverage well depth is 5,200 feet. Figure 3 is an isopach of the grossNisku oil pay. There was no evidence of a gas cap overlying the oil pool.
Development drilling was essentially completed by 1956. Subsequent tounitization in May, 1957, five wells were drilled and six D-3 wells weredual-completed. Six wells in the northwest corner of the field, BASU 15-20,16-20, 13-21, 4-28, 1-29 and 2-29, were added to the unit in February,1960.
The Nisku formation is a biostromal reef structure, draped over the Leduc(D-3) bioherm. The stratigraphy is illustrated in Figures 4, 5 and 6,which are geological cross sections of the field. The D-2 may be classifiedinto two components. The upper sub-member, which varies from a thickness of 30feet at the crest to 100 feet on the flanks, is an evaporitic sequence ofprimary anhydrite and dolomite and forms the caprock.
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