BBakken SubsurfaceNorth Dakota well index

NDIC file 11841 · API 33-053-02123-00-00

GRASSY BUTTE 21X-21F

Operated by WHITE ROCK OIL & GAS, LLC · McKenzie County, North Dakota

Active (A)Oil and gasSpud 1985

Well facts

Operator
WHITE ROCK OIL & GAS, LLC
Status
Active (A)
Well type
Oil and gas (OG)
Field
GRASSY BUTTE
Spud date
Total depth
10,200 ft
Legal location
NENW Sec 21 T146N R99W
Footages
837 ft FNL · 2,140 ft FWL
County
McKenzie County
NDIC file no.
11841
API no.
33-053-02123-00-00

Location & navigation

47.45617, -103.30345

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

See it in 3D

Production

146 months reported, Jul 2014 to Aug 2026, MADISON and TYLER pools.

Cumulative oil15.3KbblJul ’14 to Aug ’26 · 146 of 146 months known
Peak oil rate82bbl/dJul 2014 · 82 bbl in 1 days
Oil, last 12 months1,156bbl+108% against the 12 before
Gas–oil ratio, last 12 months0scf/bblfirst year 4,130 scf/bbl
Water cut, last 12 months84%first year 54% · 44.6K bbl water in all
Gas sold, last 12 months—%of gas produced · 0 mcf reported flared
050100Oil bbl/d2201620182020202220242026

Early time

First reported month
Jul 2014
Months to peak
10 (Apr 2015)
Peak month rate
82 bbl/d on 1 days
First 3 months, oil
375 bbl
First 6 months, oil
735 bbl
First 12 months, oil
2,071 bbl
First 24 months, oil
4,892 bbl
Share of cumulative in year 1
14%

Today

Last reported month
Aug 2026
Last month with oil
Aug 2026
Latest oil rate
2 bbl/d
Latest rate as share of peak
2.7%
Uptime, last 12 months
80% of days
Cumulative gas
9,299 mcf
Cumulative water
44.6K bbl
Pools reported
MADISON, TYLER
Last 12 months as a table
MonthOil bblGas mcfWater bblDaysOil bbl/dGOR scf/bblWater cut
0000———
1550512315077%
1820563306076%
1630583237078%
1110333177075%
390155143080%
850967253092%
1250819304087%
850552313087%
650511302089%
780505313087%
680411312086%

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.

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.