BBakken SubsurfaceNorth Dakota well index

NDIC file 25957 · API 33-105-03121-00-00

MARK 4-9F #4TFH

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

Active (A)Oil and gasSpud 2016

Well facts

Operator
DEVON ENERGY WILLISTON, L.L.C.
Status
Active (A)
Well type
Oil and gas (OG)
Field
WILLISTON
Spud date
Total depth
20,986 ft
Legal location
LOT4 Sec 4 T154N R100W
Footages
465 ft FNL · 733 ft FWL
County
Williams County
NDIC file no.
25957
API no.
33-105-03121-00-00

Location & navigation

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48.19650, -103.55807

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

92 months reported, Jan 2019 to Aug 2026, BAKKEN pool.

Cumulative oil287KbblJan ’19 to Aug ’26 · 92 of 92 months known
Peak oil rate687bbl/dMar 2019 · 17,874 bbl in 26 days
Oil, last 12 months7,520bbl+10% against the 12 before
Gas–oil ratio, last 12 months5,791scf/bblfirst year 1,196 scf/bbl
Water cut, last 12 months81%first year 69% · 755K bbl water in all
Gas sold, last 12 months96%of gas produced · 568 mcf reported flared
0250500750Oil bbl/d1720192020202120222023202420252026

Early time

First reported month
Jan 2019
Months to peak
3 (Mar 2019)
Peak month rate
687 bbl/d on 26 days
First 3 months, oil
19,459 bbl
First 6 months, oil
52,744 bbl
First 12 months, oil
114,010 bbl
First 24 months, oil
193,267 bbl
Share of cumulative in year 1
40%

Today

Last reported month
Aug 2026
Last month with oil
Aug 2026
Latest oil rate
17 bbl/d
Latest rate as share of peak
2.5%
Uptime, last 12 months
100% of days
Cumulative gas
722K mcf
Cumulative water
755K bbl
Pools reported
BAKKEN
Last 12 months as a table
MonthOil bblGas mcfWater bblDaysOil bbl/dGOR scf/bblWater cut
5893,5882,80130206,09283%
6763,8702,85731225,72581%
6493,5132,67430225,41380%
6313,8122,88131206,04182%
6493,5972,69131215,54281%
6513,4312,77328235,27081%
7183,8142,60731235,31278%
5943,8112,71630206,41682%
6843,8562,61031225,63779%
5563,4482,71429196,20183%
5943,5732,70531196,01582%
5293,2342,85831176,11384%

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.