WELL · 42-311-36056 · DISTRICT 1
Y-Bar Unit C #1H
McMullen County · Eagleville (Eagle Ford-1) field · Producing · Horizontal
Y-Bar Unit C #1H (API 42-311-36056) is a horizontal well in Mcmullen County operated by Castlerock EF Operating LLC, completed September 28, 2014 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued May 27, 2014, permitted to 10,000 ft.
It was permitted by Murphy Expl. & Prod. CO. - USA and has since transferred to Castlerock EF Operating LLC on the wellbore schedule.
Completion filings report 11 formation tops, including Frio, Catahoula, Yegua, Wilcox.
Its lease has reported 212K barrels of oil and 191K mcf of gas since June 2014, last reporting in July 2026. The lease carries 2 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Murphy Expl. & Prod. Co. - USA; the EWA schedule now lists a different operator.
San Antonio, TX · P-5 Y, filed Nov 4, 2025 · 34 permits on file · (210) 688-4585
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Castlerock EF Operating LLC |
| Production reports | Castlerock EF Operating LLCthrough Apr 2026 |
| Latest permit | Murphy Expl. & Prod. Co. - USAMay 27, 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
- 2
- permits on file
- May 27, 2014
- last permit issued
- Sep 28, 2014
- completed
- 212K
- cumulative oil, bbl
- 191K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jun 2014 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Sep 28, 2014
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: X
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 lease this well is completed on; they carry 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Y-Bar Unit C O-1-18268 | Eagleville (Eagle Ford-1) | Castlerock EF Operating LLC | 2 | 212K | 191K | Jun 2014 – Jul 2026 |
Oil, barrels lease total
Last 12 months 5,647 · prior 12 2,991(+89%)
Gas, mcf lease total
Last 12 months 3,625 · prior 12 3,747(-3%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Murphy Expl. & Prod. Co. - USAOct 2014 → Jul 2022
- 2Castlerock EF Operating LLCAug 2022 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 785419-98 | Drill | Murphy Expl. & Prod. Co. - USA | Oct 9, 2014 | May 27, 2014 | Sep 12, 2014 | 10,000 |
| 785419-99 | Drill | Murphy Expl. & Prod. Co. - USA | Apr 24, 2014 | May 27, 2014 | May 29, 2014 | 10,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-18268 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 352 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Frio | 1,460 | -1,108 |
| FrioFRIO - DISPOSAL | 1,460 | -1,108 |
| Catahoula | 1,590 | -1,238 |
| CatahoulaCATAHOULA - DISPOSAL | 1,590 | -1,238 |
| Yegua | 2,890 | -2,538 |
| YeguaYEGUA - DISPOSAL | 2,890 | -2,538 |
| Wilcox | 4,750 | -4,398 |
| WilcoxWILCOX - DISPOSAL | 4,750 | -4,398 |
| Navarro | 6,324 | -5,972 |
| Olmos | 7,253 | -6,901 |
| Escondido | 8,340 | -7,988 |
| Undiff Chalk | 8,647 | -8,295 |
| Austin Chalk | 9,070 | -8,718 |
| Eagle FordEAGLEFORD | 9,446 | -9,094 |
| Anacacho | 9,480 | -9,128 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,838 | 11,722 | Perforated |
| 12,416 | 14,431 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 4,138 | 12.25 | 1,396 S |
| 5.5 | 14,617 | 7.875 | 1,415 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 | Jul 9, 2015 | Mar 18, 2015 | Yes |
| 00 | Jun 5, 2015 | Sep 12, 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 42-311-36056 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-311-36056 → 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/31136056, documented in the API reference.