BBakken SubsurfaceNorth Dakota well index

NDIC file 18364 · API 33-061-01137-00-00

ZEPHYR 1-36H

Operated by SLAWSON EXPLORATION COMPANY, INC. · Mountrail County, North Dakota

Active (A)Oil and gasSpud 2009

Well facts

Operator
SLAWSON EXPLORATION COMPANY, INC.
Status
Active (A)
Well type
Oil and gas (OG)
Field
BIG BEND
Spud date
Total depth
15,523 ft
Legal location
NWNE Sec 1 T151N R93W
Footages
200 ft FNL · 1,400 ft FEL
County
Mountrail County
NDIC file no.
18364
API no.
33-061-01137-00-00

Location & navigation

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47.93378, -102.51981

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

199 months reported, Feb 2010 to Aug 2026, BAKKEN and CONFIDENTIAL pools.

Cumulative oil498KbblFeb ’10 to Aug ’26 · 197 of 199 months known
Peak oil rate597bbl/dMay 2010 · 17,913 bbl in 30 days
Oil, last 12 months10.5Kbbl-43% against the 12 before
Gas–oil ratio, last 12 months2,768scf/bblfirst year 684 scf/bbl
Water cut, last 12 months46%first year 16% · 205K bbl water in all
Gas sold, last 12 months95%of gas produced · 33 mcf reported flared
0200400600Oil bbl/d3120122014201620182020202220242026

Early time

First reported month
Feb 2010
Months to peak
4 (May 2010)
Peak month rate
597 bbl/d on 30 days
First 3 months, oil
12,363 bbl (1 of 3 known)
First 6 months, oil
51,248 bbl (4 of 6 known)
First 12 months, oil
90,024 bbl (10 of 12 known)
First 24 months, oil
136,659 bbl (22 of 24 known)
Share of cumulative in year 1
18%

Today

Last reported month
Aug 2026
Last month with oil
Aug 2026
Latest oil rate
31 bbl/d
Latest rate as share of peak
5.2%
Uptime, last 12 months
72% of days
Cumulative gas
575K mcf
Cumulative water
205K bbl
Unknown months
2 of 199 (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
9342,73238123412,92529%
1,3083,3391,13929452,55347%
0149010——
0000———
54115461542,13046%
1,4833,1561,17628532,12844%
1,3783,3401,33731442,42449%
1,1603,1091,11830392,68049%
1,1423,3591,04931372,94148%
1,0133,18290328363,14147%
1,0233,04790431332,97847%
9603,41391431313,55549%

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.