Distribution of Hydraulic Head in the Wapiti / Belly River Hydrostratigraphic Unit

This map depicts the distribution of hydraulic head in the Wapiti / Belly River hydrostratigraphic unit (HSU). The map is a result of a simple kriging technique using publicly available data from Alberta Environment and Parks' (AEP) Alberta Water Well Information Database (AWWID) and formation water analyses from oil and gas well drillstem tests and production data.

The hydraulic head surface was mapped at a regional scale using many years of data, thus providing a good indication of hydraulic head within the unit rather than site-specific values.The uncertainty of prediction is depicted on an inset map, which shows the residual values (predicted value minus measured value) plotted at each location to indicate where underprediction and overprediction occurs compared to the measured head values. A Cumulative Inference Index (CII) methodology is used to identify production/injection influenced drillstem tests.

Additional formation-scale hydrogeological maps (distribution of total dissolved solids and production/injection influenced map), are shown as insets to complement this map. The geometry and variable thickness of the Wapiti/Belly River HSU are shown on schematic cross-sections.

This is a regional-scale map and is not intended for local-scale analysis.