BBakken SubsurfaceNorth Dakota well index

NDIC file 18100 · API 33-105-01731-00-00

GBU MENDENHALL 12X-18

Operated by XTO ENERGY INC · Williams County, North Dakota

Active (A)Oil and gasSpud 2009

Well facts

Operator
XTO ENERGY INC
Status
Active (A)
Well type
Oil and gas (OG)
Field
GRINNELL
Spud date
Total depth
19,200 ft
Legal location
LOT2 Sec 18 T154N R95W
Footages
2,200 ft FNL · 300 ft FWL
County
Williams County
NDIC file no.
18100
API no.
33-105-01731-00-00

Location & navigation

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48.16231, -102.95621

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

200 months reported, Jan 2010 to Aug 2026, BAKKEN and CONFIDENTIAL pools.

Cumulative oil301KbblJan ’10 to Aug ’26 · 199 of 200 months known
Peak oil rate454bbl/dFeb 2010 · 8,172 bbl in 18 days
Oil, last 12 months7,197bbl+3% against the 12 before
Gas–oil ratio, last 12 months2,086scf/bblfirst year 1,044 scf/bbl
Water cut, last 12 months23%first year 20% · 76.2K bbl water in all
Gas sold, last 12 months64%of gas produced · 2,861 mcf reported flared
0200400600Oil bbl/d23201020122014201620182020202220242026

Early time

First reported month
Jan 2010
Months to peak
2 (Feb 2010)
Peak month rate
454 bbl/d on 18 days
First 3 months, oil
15,437 bbl (2 of 3 known)
First 6 months, oil
33,626 bbl (5 of 6 known)
First 12 months, oil
62,721 bbl (11 of 12 known)
First 24 months, oil
105,067 bbl (23 of 24 known)
Share of cumulative in year 1
21%

Today

Last reported month
Aug 2026
Last month with oil
Aug 2026
Latest oil rate
23 bbl/d
Latest rate as share of peak
5.1%
Uptime, last 12 months
91% of days
Cumulative gas
412K mcf
Cumulative water
76.2K bbl
Unknown months
1 of 200 (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
2456408615162,61226%
7571,76614431242,33316%
1,0291,99232230341,93624%
5501,40818331182,56025%
5831,31513831192,25619%
3157747027122,45718%
7551,4665731241,9427%
7671,26613830261,65115%
6301,02922025251,63326%
42080629119221,91941%
4251,16429630142,73941%
7211,38917331231,92619%

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.