Table 21.1

Reservoir types in the Viking Formation, Central Alberta.

Table 21.3a

Oil production from the Viking

Table 21.3b

Gas production from the Viking

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Figure 21.1

Index map showing some of the prominent geological features and generalized paleogeography of Viking and equivalent strata in the Western Canada Sedimentary Basin. Locations of reference logs (Figs. 21.5 - 21.7) and cross sections (Figs. 21.8, 21.11, 21.12, 21.18) are also shown.

Figure 21.2

Stratigraphic nomenclature for the Viking Formation and equivalent units, and enclosing strata (from Rudkin, 1964; McGookey, 1972; Leckie and Reinson, in press; Dolson et al., 1991).

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Figure 21.3

Structure contour map of the top of the Viking Formation. Locations of largest oil and gas fields are superimposed.

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Figure 21.4

Isopach map of the interval from the top of the Viking Formation to the top of the Mannville Group. Broad lithofacies domains, derived from Canadian Stratigraphic Service sample logs, are superimposed on the isopach. Note that the depicted lithofacies reflect the combined Viking-Joli Fou interval, and equivalents.

Figure 21.5

Reference logs for the Viking Formation in south-central and central Alberta. These are the typical log signatures displayed by the "regional" Viking succession. Vertical scale (1:1200) is considerably expanded from the Atlas standard for reference logs (1:3000).

Figure 21.6

Reference logs for the Peace River Formation in northwestern Alberta and northeastern British Columbia. Note the definitive log character of the Harmon, Cadotte and Paddy members. Vertical scale is Atlas standard (1:3000).

Figure 21.7

Reference log for the Bow Island Formation in southern Alberta. Note distinctive upper and lower boundaries. Three facies units are clearly delineated by the log signature. Note also several coarsening-upward cycles indicated in the log signature of the lower facies unit. Vertical scale (1:1200) is considerably expanded from the Atlas standard for reference logs (1:3000).

Figure 21.8

Regional cross section J-J' extending from south of the Peace River Arch southeastward through the Pembina and Caroline-Ricinus regions to the area of the Viking-Bow Island transition southeast of Calgary, and then directly southward to the United States border. Line of cross section is shown on Figure 21.1.

Figure 21.9

Cored lithofacies sequences from the Crystal Field area, along with two east-west lithofacies cross sections, showing incised estuarine valley-fill deposits (modified from Reinson et al., 1988, and Clark and Reinson, 1990).

Figure 21.10

Generalized schematic diagram illustrating the sequential development of the estuarine valley-fill sequence in the Viking Crystal Field, central Alberta.

Figure 21.11

East-west cross section K-K' through central Alberta, illustrating the two principal stratigraphic sequences (TST, transgressive; HST, regressive) in the Viking Formation, separated by a major unconformity (sequence boundary). Line of cross section is shown on Figure 21.1. All logs are gamma ray.

Figure 21.12

East-west cross section L-L' through south-central Alberta, illustrating the two principal stratigraphic sequences (TST, transgressive; HST, regressive) in the Viking Formation, separated by a major unconformity (sequence boundary). Line of cross section is shown on Figure 21.1. All logs are gamma ray.

Figure 21.13

Cored sequence and log signature from a well in the Joarcam Field, showing the Viking succession in a sequence stratigraphic context (see Posamentier and Chamberlain (in press) for an alternate interpretation of Joarcam).

Figure 21.14

Cored sequence of the Viking Formation in the 15-36-61-8W5 well. This core penetrates that part of the Viking sequence that is entirely above the sequence boundary.

Figure 21.15

Generalized schematic section depicting a sequence stratigraphic model for the Viking Formation in central Alberta.

Figure 21.16

Composite measured section of the Peace River Formation in northwestern Alberta, illustrating the sequence boundary at the base of the Paddy Member (from Leckie and Singh, 1991).

Figure 21.17

Cross section illustrating the downcutting and erosional truncation of the Cadotte Member at the base of the Paddy Member (modified from Leckie et al., 1990). All logs are gamma ray.

Figure 21.18

West-east cross section M-M' through southern Alberta, illustrating the two principal sequences (TST, transgressive; HST, regressive) in the Bow Island Formation, separated by a major unconformity (sequence boundary). Line of cross section is shown on Figure 21.1. All logs are gamma ray (G.R.), save one spontaneous potential (S.P.).

Figure 21.19

Generalized schematic section depicting a sequence stratigraphic model for the Bow Island Formation in southern Alberta.