WELL · 42-283-34950 · DISTRICT 1
STS A #4 H
LA Salle County · A.W.P. (Olmos) field · Horizontal
Sts A #4 H (API 42-283-34950) is a horizontal well in La Salle County operated by Sierra Resources LLC, completed February 2, 2015.
The RRC has issued one drilling permit, issued July 1, 2014, permitted to 10,000 ft.
It was permitted by Welhausen Operating Company, LP and has since transferred to Sierra Resources LLC on the wellbore schedule.
Completion filings report 14 formation tops, including Yegua, Sparta, Queen City, Reklaw.
Its 2 leases have reported 7.73K barrels of oil and 1.21M mcf of gas since December 2013, last reporting in July 2026. The leases carry 9 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Welhausen Operating Company, LP; the EWA schedule now lists a different operator.
Houston, TX · P-5 Y, filed Jul 2, 2021 · 72 permits on file · (832) 814-5586
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Sierra Resources LLC |
| Production reports | Silverbow Resources Oper, LLCthrough Apr 2026 |
| Latest permit | Welhausen Operating Company, LPJul 1, 2014 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,000
- total depth, ft
- 1
- permits on file
- Jul 1, 2014
- last permit issued
- Feb 2, 2015
- completed
- 7.73K
- cumulative oil, bbl
- 1.21M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Dec 2013 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Feb 2, 2015
- Shut in
- —
- Plugged
- —
Surface location
No coordinates on the permit record yet. The RRC's GIS record usually lands within days of issuance; historical master-file permits never carry one.
Lease production
PDQ LEASE REPORTS · REPORTED THROUGH APR 2026
Texas reports oil by lease, not by well. These are the 2 leases this well is completed on; they carry 9 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| STS 'A' G-1-279803 | A.W.P. (Olmos) | Crescent Energy Operating, LLC | 1 | 0 | 1.11M | Feb 2015 – Jul 2026 |
| STS 'A' O-1-17556 | A.W.P. (Olmos) | Sierra Resources, LLC | 8 | 7.73K | 104K | Dec 2013 – Jun 2018 |
Gas, mcf lease total
Last 12 months 16,290 · prior 12 16,228(+0%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Welhausen Operating Company, LPFeb 2014 → Oct 2014
- 2Sierra Resources, LLCNov 2014 → Feb 2020
- 3Sandpoint Operating, LLCMar 2020 → Apr 2022
- 4Silverbow Resources Oper, LLCMay 2022 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 789889-99 | Drill | Welhausen Operating Company, LP | Jun 18, 2014 | Jul 1, 2014 | Jul 6, 2014 | 10,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-1-279803 | — | — | — | — |
| — | — O-1-17556 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 350 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Yegua | 861 | -511 |
| Yegua | 864 | -514 |
| Sparta | 1,756 | -1,406 |
| Queen City | 2,035 | -1,685 |
| Reklaw | 3,464 | -3,114 |
| Carrizo | 3,986 | -3,636 |
| Wales | 5,160 | -4,810 |
| WilcoxWILCOX - DISPOSAL | 5,489 | -5,139 |
| Escondido | 7,616 | -7,266 |
| OlmosOLMOS - DISPOSAL | 8,976 | -8,626 |
| Taylor | 9,123 | -8,773 |
| Olmos | 9,583 | -9,233 |
| OlmosOLMOS - DISPOSAL | 9,583 | -9,233 |
| Austin Chalk | — | — |
| BudaBUDA - H2S | — | — |
| Eagle FordEAGLE FORD - H2S | — | — |
| EdwardsEDWARDS - H2S | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,519 | 14,586 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 4,960 | 12.25 | 1,628 S |
| 5.5 | 8,217 | 8.75 | 2,063 S |
| 4.5 | 14,652 | 6.75 | 2,063 S |
Completion filings
W-2 and G-1 reports on record in the RRC wellbore file, newest first. The suffix identifies the wellbore or completion event. About these reports →
| Suffix | Filed | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Apr 26, 2022 | Apr 6, 2022 | — |
| 00 | Jul 12, 2018 | Jun 19, 2018 | — |
| 00 | Jul 13, 2016 | Jun 22, 2016 | Yes |
| 00 | May 4, 2016 | Feb 18, 2016 | — |
| 00 | Jun 1, 2015 | Mar 11, 2015 | Yes |
| 00 | Feb 4, 2015 | Sep 16, 2014 | Yes |
The source documents
Petrora holds the structured record. The scanned filings live at the RRC; these links open its search already filled in for this API.
- Wellbore filings for 42-283-34950 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-283-34950 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward). then paste it into their search.
About this data
Permits from the RRC OGA049M master and daily daf420 files; wellbore and operator of record from the EWA schedule, weekly; completions, formation tops, casing, and perforations from the dbf900 wellbore file; production from PDQ lease reports, which lag two to three months; injection from UIC permits, H-10 reports, and TexNet daily volumes; earthquakes from the TexNet catalog.
New to these records? How to read a well page · API numbers · completion reports and tops · why production is by lease
Developers: this page as JSON is GET /v1/data/wells/28334950, documented in the API reference.