BBakken SubsurfaceNorth Dakota well index

NDIC file 33321 · API 33-025-03259-00-00

MANDAREE SOUTH 25-36HT

Operated by DEVON ENERGY WILLISTON, L.L.C. · Dunn County, North Dakota

Active (A)Oil and gasSpud 2017

Well facts

Operator
DEVON ENERGY WILLISTON, L.L.C.
Status
Active (A)
Well type
Oil and gas (OG)
Field
SPOTTED HORN
Spud date
Total depth
21,243 ft
Legal location
LOT5 Sec 30 T150N R93W
Footages
450 ft FNL · 376 ft FWL
County
Dunn County
NDIC file no.
33321
API no.
33-025-03259-00-00

Location & navigation

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47.78850, -102.64087

Published surface location (NAD83). A horizontal well's lateral can run up to three miles from this point.

See it in 3D

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Production

108 months reported, Sep 2017 to Aug 2026, BAKKEN and CONFIDENTIAL pools.

Cumulative oil462KbblSep ’17 to Aug ’26 · 107 of 108 months known
Peak oil rate1,793bbl/dNov 2017 · 53,794 bbl in 30 days
Oil, last 12 months6,176bbl-15% against the 12 before
Gas–oil ratio, last 12 months11,129scf/bblfirst year 1,424 scf/bbl
Water cut, last 12 months66%first year 43% · 395K bbl water in all
Gas sold, last 12 months96%of gas produced · 1,215 mcf reported flared
01,0002,000Oil bbl/d13201820192020202120222023202420252026

Early time

First reported month
Sep 2017
Months to peak
3 (Nov 2017)
Peak month rate
1,793 bbl/d on 30 days
First 3 months, oil
60,898 bbl (2 of 3 known)
First 6 months, oil
139,218 bbl (5 of 6 known)
First 12 months, oil
253,410 bbl (11 of 12 known)
First 24 months, oil
315,604 bbl (23 of 24 known)
Share of cumulative in year 1
55%

Today

Last reported month
Aug 2026
Last month with oil
Aug 2026
Latest oil rate
13 bbl/d
Latest rate as share of peak
0.7%
Uptime, last 12 months
90% of days
Cumulative gas
1.09M mcf
Cumulative water
395K bbl
Unknown months
1 of 108 (confidential or not in that month's report)
Pools reported
BAKKEN, CONFIDENTIAL
Last 12 months as a table
MonthOil bblGas mcfWater bblDaysOil bbl/dGOR scf/bblWater cut
5775,3151,78622269,21176%
9708,6191,73631318,88664%
7947,9711,229302610,03961%
7597,696991312410,14057%
7088,5321,278312312,05164%
4375,693986281613,02769%
3366,012916311117,89373%
3972,85455730137,18958%
3123,342350311010,71253%
4166,481959291415,57970%
791,06917051613,53268%
3915,1511,000311313,17472%

As first reported to NDIC in each month's report (NDIC Monthly Production Reports, Jan 2003 to Aug 2026). Operators amend past months later and the published reports are not updated, so a month can differ from the current record. A blank or missing month is unknown, not zero, and a cumulative over such months is a lower bound; two pools reported in one month are summed. Rates per producing day divide the month's volume by the days reported, so a month reported without producing days has no rate. Gas–oil ratio is gas produced over oil produced; water cut is water over oil plus water. Months from Jan 2003 to Apr 2015 are read from the Division's PDF reports, which print no flared gas and list a well in a unitized pool only inside its unit's total.

Spacing units

Units whose published footprint holds at least 660 ft of this well's surveyed lateral. Allowances are facts extracted from signed NDIC orders, machine-extracted and not human-reviewed.

Nearby wells

Closest published well heads within 3 miles; wells on one pad share a location.

Other published attributes (1)
symbolA-OG

DMR shapefile columns not shown above, unchanged.