The Stensvad field is a fault-stratigraphic trap situated in an east plunging syncline. An east west fault limits the field to the south while stratigraphy controls the west and north limits.

Pre-Alaska Bench post-Heath nomenclature has been, and is, very complicated due to complex stratigraphy. Today, owing to the contributions of the many workers concerned with this interval, important formational units and unconformities are being recognized with subsequent resolution of the stratigraphic and nomenclatural problems.

The pre-Alaska Bench post-Heath stratigraphy in the Stensvad field area is most interesting, but can only be appreciated when considered in its regional setting. This sequence originated with uplift and erosion with ensuing alluvial fill of "channeled," or down-warped, areas, followed by marine transgression and regression.

Stensvad field is productive from three sandstone bodies occurring within the Tyler formation.

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