Deeper Rights Reversion Zone Designation Lookup

A DRRZD is officially known by its combined NAME and NUMBER.   Because a pdf file can contain several DRRZDs, its file name reflects the names/numbers found within.

To locate your desired DRRZD, you only need to key the Number or Name or even part of the name.   The search will return one or a list of files for you to choose, eg:  

  • If you key:  012 or Medicine Hat or Medicine or med (case doesn't matter), you'll receive:
  • Badheart_Muskiki_275_Medicine_Hat_012_Upper_Colorado_Shale_282.pdf
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Deeper rights reversion was introduced into the Department of Energy’s tenure system in 1976. It allows for petroleum and natural gas rights below the base of the deepest productive zone to be deleted from a lease and returned to the land bank. This releases the rights that had been sterilized by shallow production and allows for further development. The Department of Energy’s Information letter 1998-14 discusses deeper rights reversion in detail.

Deeper rights reversion zone designation (DRRZD) - identifies a zone by its name. As noted in EUB Decision 95-10, historically the name of the zone identified within type wells takes precedence over the depths identified in terms of utilizing a DRRZD.

Environment and Resource Services has compiled a PDF library, showing the administrative areas of DRRZD’s as well as their respective type well log and interval. These files can be viewed using Acrobat Reader.

Notes & Disclaimers

*On January 1, 2008, the Alberta Utilities Commission Act split the EUB into two new regulatory bodies, the Energy Resources Conservation Board (ERCB) and the Alberta Utilities Commission (AUC). The ERCB is responsible for the development of Alberta’s oil and gas resources and the AUC is responsible for the distribution and sale of electricity and natural gas to Alberta consumers.

Note 1: Log Annotation Guide: For each DRRZD type well log, the interval is annotated with blue, and indicated further by an arrow within the interval. All other specified tops were provided on the ERCB database, and marked by a red line. For consistency, all depth numbers were recorded in red.

Note 2: Upon clicking one of the DRRZDs below, you will be directed to a site with the map of that DRRZD as well as its type well log. In some cases a map may contain more than one DRRZD. If so, simply scroll through the pages after the map until you find the desired DRRZD log.

Tools/References/Disclaimer:
The type well, log and interval for each DRRZD were assigned by the Energy Resources Conservation Board.
All raster annotations were performed using the Imaging for Windows Application, via Microsoft.
Data represented on DRRZD maps is for general information only.
The user is responsible for verifying the data before making decisions based on these maps and reference wells.
Base Features found on DRRZD maps provided by Spatial Data Warehouse Ltd.