Sinclair Oil & Gas

Operator of record for 692 catalogued wells across 13 states. Every well below links to its full registry page.

Filed as: SINCLAIR OIL & GAS · SINCLAIR OIL & GAS CO · SINCLAIR OIL & GAS CO. · SINCLAIR OIL & GAS COMPANY · …

At a glance

Sinclair Oil & Gas is the operator of record for 692 catalogued U.S. oil & gas wells in 13 states. 79 (11%) are active, 530 (77%) plugged & abandoned and 17 flagged as orphaned. Its largest concentration is in Kentucky, with 186 wells (27% of its portfolio).

Wells operated

692

Active

Plugged

530

Orphaned

Portfolio by state

State	Wells
Kentucky	186
Illinois	163
Colorado	114
Oklahoma	101
Mississippi	79
North Dakota	13
Arkansas	12
Utah	11
Louisiana	8
Wyoming	2
Alabama	1
California	1
New Mexico	1

Well mix

Oil wells: 258
Gas wells: 18
Shut-in: 0
Active share: 11%

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Where does Sinclair Oil & Gas operate?

Sinclair Oil & Gas's catalogued wells are spread across 13 states: Kentucky (186), Illinois (163), Colorado (114), Oklahoma (101) and Mississippi (79) and 8 more. Its 79 Mississippi wells are 0.2% of the 34,924 catalogued in that state — its largest share of any state. Counts cover only states whose registries WellCensus has ingested with operator names; wells in Nebraska and Texas (location indexes) and in states without a registry ingest are not yet attributed to any operator.

How many of Sinclair Oil & Gas’s wells are active, plugged or orphaned?

11% of Sinclair Oil & Gas's catalogued wells are active, 17 percentage points below the national share of 29%. 77% are plugged & abandoned, against 47% nationally. 17 wells filed under this name are flagged as orphaned — unplugged, with no operator able to plug them.

What kinds of wells does Sinclair Oil & Gas operate?

By product class, 258 (37%) are oil wells and 18 (3%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is E A Mcilhenny 001 in Vermilion, LA at 17,405 ft. The wells listed below sit in Vermilion (LA), Greene (MS), Jasper (MS), Clarke (AL), Dunn (ND) and Conway (AR) and other counties. State filings spell the name 6 ways; WellCensus merges exact-normalized spellings only, so subsidiaries and affiliates keep their own pages.

Notable wells operated by Sinclair Oil & Gas

Wells operated by Sinclair Oil & Gas
Well	API # / state ID	Status	Type	Location	Operator	Depth
E A Mcilhenny 001	17-113-01241	Plugged & abandoned	Other type	Vermilion, LA	Sinclair Oil & Gas Co.	17,405 ft
Robinson Land & Lbr 1 1	23-041-00053	Plugged & abandoned	Other type	Greene, MS	Sinclair Oil & Gas Co.	16,372 ft
Bertha M Tatum 1 1	23-061-00390	Plugged & abandoned	Other type	Jasper, MS	Sinclair Oil & Gas Co.	14,342 ft
Gilmore et al #1	01-025-19992	Plugged & abandoned	Other type	Clarke, AL	Sinclair Oil & Gas Co.	13,360 ft
N. A. Knudsvig 1	33-025-00024	Plugged & abandoned	Oil	Dunn, ND	Sinclair Oil & Gas Company	13,283 ft
Rockefeller, W 1	03-029-00002	Plugged & abandoned	Gas	Conway, AR	Sinclair Oil & Gas Co	11,832 ft
Joseph Muecke 1	33-089-00012	Plugged & abandoned	Oil	Stark, ND	Sinclair Oil & Gas Company	11,080 ft
H Alexander Unit 2 1 1	23-113-00192	Plugged & abandoned	Other type	Pike, MS	Sinclair Oil & Gas Co.	10,850 ft
Raphael Demarco # 1 # 1	23-001-01387	Plugged & abandoned	Other type	Adams, MS	Sinclair Oil & Gas Co.	10,763 ft
Federal-Smith 1	03-083-00031	Plugged & abandoned	Gas	Logan, AR	Sinclair Oil & Gas Co	10,495 ft
Morris A Gosserand 001	17-077-00032	Plugged & abandoned	Oil	Pointe Coupee, LA	Sinclair Oil & Gas Co.	10,495 ft
Gustave Pothier 001	17-097-00959	Plugged & abandoned	Gas	St Landry, LA	Sinclair Oil & Gas Co.	10,225 ft

Deepest first where depth is published. See all 692 wells →

Frequently asked questions

How many wells does Sinclair Oil & Gas operate?

Sinclair Oil & Gas is the operator of record for 692 catalogued oil & gas wells, with the largest concentration in Kentucky (186). Only wells in states WellCensus has ingested are counted.

How many of Sinclair Oil & Gas's wells are still active?

79 of Sinclair Oil & Gas's catalogued wells are active; 530 are plugged & abandoned and 17 are flagged as orphaned.

In which states does Sinclair Oil & Gas operate wells?

Sinclair Oil & Gas is the operator of record for wells in Kentucky (186), Illinois (163), Colorado (114), Oklahoma (101), Mississippi (79), North Dakota (13), Arkansas (12), Utah (11), Louisiana (8), Wyoming (2), Alabama (1), California (1) and New Mexico (1).

Does Sinclair Oil & Gas operate mostly oil or gas wells?

258 of Sinclair Oil & Gas's catalogued wells are oil wells and 18 are gas wells; the rest are injection, service or unclassified wells.

What is Sinclair Oil & Gas's deepest well?

Among wells with a published depth, E A Mcilhenny 001 in Vermilion, LA is the deepest at 17,405 ft.

Where Sinclair Oil & Gas's wells are

About this data

Source: State oil & gas regulator registries (operator of record as filed, exact-normalized across states) plus the USGS United States Documented Orphaned Well Database (2026), as published October 10, 2026 — WellCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.

Cite as: WellCensus, “Sinclair Oil & Gas — well portfolio”, https://wellcensus.com/operators/sinclair-oil-gas-1101 (data as of October 10, 2026).

Dataset updated October 2026 . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).