South Texas Development
Operator of record for 32 catalogued wells across 2 states. Every well below links to its full registry page.
Filed as: SOUTH TEXAS DEVELOPMENT CO · SOUTH TEXAS DEVELOPMENT COMPANY
At a glance
South Texas Development is the operator of record for 32 catalogued U.S. oil & gas wells in 2 states. None is listed as active, 31 (97%) are plugged & abandoned. Its largest concentration is in Colorado, with 30 wells (94% of its portfolio).
Wells operated
32
Active
0
Plugged
31
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Colorado | 30 |
| Wyoming | 2 |
Well mix
- Oil wells
- 8
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 0%
Is this your company?
Claim South Texas Development to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does South Texas Development operate?
South Texas Development's catalogued wells are spread across 2 states: Colorado (30) and Wyoming (2). Its 30 Colorado wells are 0.0% of the 124,327 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 South Texas Development’s wells are active, plugged or orphaned?
0% of South Texas Development's catalogued wells are active, 29 percentage points below the national share of 29%. 97% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does South Texas Development operate?
By product class, 8 (25%) are oil wells and 0 (0%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is Delahoyde 1 in Niobrara, WY at 6,925 ft. The wells listed below sit in Niobrara (WY), Weld (CO), Arapahoe (CO), Morgan (CO) and Logan (CO). State filings spell the name 2 ways; WellCensus merges exact-normalized spellings only, so subsidiaries and affiliates keep their own pages.
Notable wells operated by South Texas Development
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Delahoyde 1 | 49-027-05774 | Plugged & abandoned | Oil | Niobrara, WY | South Texas Development Company | 6,925 ft |
| 24-1 Government | 05-123-05552 | Plugged & abandoned | Other type | Weld, CO | South Texas Development Co | 6,115 ft |
| 1 Grabill | 05-123-05615 | Plugged & abandoned | Other type | Weld, CO | South Texas Development Co | 6,101 ft |
| 1 Uprr-Rudolph | 05-005-05025 | Plugged & abandoned | Other type | Arapahoe, CO | South Texas Development Co | 5,945 ft |
| 1 State | 05-123-07153 | Plugged & abandoned | Other type | Weld, CO | South Texas Development Co | 5,935 ft |
| 1 J C Mortonson | 05-123-05614 | Plugged & abandoned | Oil | Weld, CO | South Texas Development Co | 5,893 ft |
| 1 R V Rodman | 05-123-05606 | Plugged & abandoned | Other type | Weld, CO | South Texas Development Co | 5,872 ft |
| 1 State B | 05-087-06486 | Plugged & abandoned | Other type | Morgan, CO | South Texas Development Co | 5,540 ft |
| 1 Mathewson | 05-075-06538 | Plugged & abandoned | Other type | Logan, CO | South Texas Development Co | 5,528 ft |
| 4 Budin | 05-075-05982 | Plugged & abandoned | Other type | Logan, CO | South Texas Development Co | 5,420 ft |
| 1 Nelson | 05-075-08186 | Plugged & abandoned | Other type | Logan, CO | South Texas Development Co | 5,402 ft |
| 2 Zeigler Estate | 05-075-40065 | Plugged & abandoned | Other type | Logan, CO | South Texas Development Co | 5,340 ft |
Deepest first where depth is published. See all 32 wells →
Frequently asked questions
How many wells does South Texas Development operate?
South Texas Development is the operator of record for 32 catalogued oil & gas wells, with the largest concentration in Colorado (30). Only wells in states WellCensus has ingested are counted.
How many of South Texas Development's wells are still active?
0 of South Texas Development's catalogued wells are active; 31 are plugged & abandoned.
In which states does South Texas Development operate wells?
South Texas Development is the operator of record for wells in Colorado (30) and Wyoming (2).
Does South Texas Development operate mostly oil or gas wells?
8 of South Texas Development's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is South Texas Development's deepest well?
Among wells with a published depth, Delahoyde 1 in Niobrara, WY is the deepest at 6,925 ft.
Where South Texas Development'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, “South Texas Development — well portfolio”, https://wellcensus.com/operators/south-texas-development-2887 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).