DRRZD Legend and Map Directory
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.
Resource Land Access 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. Click on the DRRZD below to open the file.
Notes & Disclaimers
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.
BANFF 
(includes BANFF FM D00009, BANFF FM D00057, BANFF FM D00114, BANFF FM D00160 and
BANFF FM D00255)
BELLOY (includes BELLOY FM D00032, BELLOY FM D00185 and BELLOY FM D00187)
CARDIUM (includes CARDIUM FM D00003 and CARDIUM FM D00051)
DEBOLT (includes DEBOLT FM D00042 and DEBOLT FM D00049)
DRIFT UNDIFFERENTIATED DRRZD 281
DUNVEGAN (includes DUNVEGAN FM D00038 and DUNVEGAN FM D00266)
FAIRHOLME (includes FAIRHOLME GRP D00123 and FAIRHOLME GRP D00126)
FISH SCALE (includes FISH SCALE ZONE D00238, FISH SCALE-WESTGATE D00273 and
FISH SCALE-WESTGATE D00274)
GILWOOD (includes GILWOOD MBR D00010, GILWOOD MBR D00124, GILWOOD MBR D00179 and
GILWOOD MBR D00234)
GRANITE (include GRANITE WASH D00041, GRANITE WASH D00070, GRANITE WASH D00092,
GRANITE WASH D00155, GRANITE WASH D00222 and GRANITE WASH D00239)
JURASSIC (includes JURASSIC SYSTEM D00090 and JURASSIC SYSTEM D00162)
KEG RIVER (includes KEG RIVER FM D00016, KEG RIVER FM D00063, KEG RIVER FM D00064,
KEG RIVER FM D00223, KEG RIVER FM D00252, KEG RIVER SS D00017 and KEG RIVER SS D00176)
LEDUC (includes LEDUC FM D00007, LEDUC FM D00065, LEDUC FM D00067, LEDUC FM D00068,
LEDUC FM D00069, LEDUC FM D00089, LEDUC FM D00139)
LOWER COLORADO (includes LOWER COLORADO D00121 and LOWER COLORADO SAND D00119)
MANNVILLE&SUNBURST-SWIFT D00259
MONTNEY (includes MONTNEY FM D00204 and MONTNEY FM D00264)
NISKU (includes NISKU FM D00023 and NISKU FM D00079)
NORDEGG (includes NORDEGG MBR D00066,NORDEGG MBR D00190, NORDEGG MBR D00207 and
NORDEGG MBR D00244)
PEKISKO (includes PEKISKO FM D00030, PEKISKO FM D00174)
ROCK CREEK (includes ROCK CREEK MBR D00060 and ROCK CREEK MBR D00165)
SECOND WHITE SPECKS (includes SECOND WHITE SPECKS D00013, SECOND WHITE SPECKS D00104, SECOND WHITE SPECKS D00105, SECOND WHITE SPECKS D00151, SECOND WHITE SPECKS D00158, SECOND WHITE SPECKS D00188, SECOND WHITE SPECKS D00208 and SECOND WHITE SPECKS D00269)
SHUNDA (includes SHUNDA FM D00029 and SHUNDA FM D00217)
TRIASSIC (includes TRIASSIC SYSTEM D00037, TRIASSIC SYSTEM D00056, TRIASSIC SYSTEM D00058,
TRIASSIC SYSTEM D00111, TRIASSIC SYSTEM D00138, TRIASSIC SYSTEM D00153, TRIASSIC SYSTEM D00180 and TRIASSIC SYSTEM D00214)
WABAMUN (includes WABAMUN GRP D00213 and WABAMUN GRP D00277)
WINTERBURN (includes WINTERBURN GRP D00080 and WINTERBURN GRP D00199)
*Note: 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.
