BBakken SubsurfaceNorth Dakota well index

NDIC file 19603 · API 33-025-01169-00-00

MANDAREE 30-31H

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

Active (A)Oil and gasSpud 2011

Well facts

Operator
DEVON ENERGY WILLISTON, L.L.C.
Status
Active (A)
Well type
Oil and gas (OG)
Field
REUNION BAY
Spud date
Total depth
21,097 ft
Legal location
LOT1 Sec 30 T150N R93W
Footages
250 ft FNL · 500 ft FWL
County
Dunn County
NDIC file no.
19603
API no.
33-025-01169-00-00

Location & navigation

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47.78905, -102.64037

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

184 months reported, May 2011 to Aug 2026, BAKKEN and CONFIDENTIAL pools.

Cumulative oil591KbblMay ’11 to Aug ’26 · 183 of 184 months known
Peak oil rate993bbl/dJun 2011 · 29,786 bbl in 30 days
Oil, last 12 months5,034bbl-7% against the 12 before
Gas–oil ratio, last 12 months4,303scf/bblfirst year 878 scf/bbl
Water cut, last 12 months41%first year 17% · 179K bbl water in all
Gas sold, last 12 months92%of gas produced · 15 mcf reported flared
05001,000Oil bbl/d1020122014201620182020202220242026

Early time

First reported month
May 2011
Months to peak
2 (Jun 2011)
Peak month rate
993 bbl/d on 30 days
First 3 months, oil
32,294 bbl (2 of 3 known)
First 6 months, oil
73,609 bbl (5 of 6 known)
First 12 months, oil
146,076 bbl (11 of 12 known)
First 24 months, oil
240,931 bbl (23 of 24 known)
Share of cumulative in year 1
25%

Today

Last reported month
Aug 2026
Last month with oil
Aug 2026
Latest oil rate
10 bbl/d
Latest rate as share of peak
1.0%
Uptime, last 12 months
100% of days
Cumulative gas
840K mcf
Cumulative water
179K bbl
Unknown months
1 of 184 (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
3439979830112,90722%
6341,7927731202,82611%
4281,5029030143,50917%
188445753162,36729%
5871,50421631192,56227%
40796010728152,35921%
7242,10744030242,91038%
4092,39253630145,84857%
3412,51055031117,36162%
2922,27158130107,77767%
3712,55849431126,89557%
3102,62128831108,45548%

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.