WELL · 42-311-36018 · DISTRICT 1
Y-Bar East Unit A #1H
McMullen County · Eagleville (Eagle Ford-1) field · Shut IN · Horizontal
Y-Bar East Unit A #1H (API 42-311-36018) is a horizontal well in Mcmullen County operated by Castlerock EF Operating LLC, completed June 30, 2014 and listed as shut in on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued April 28, 2014, permitted to 11,000 ft.
Completion filings report 12 formation tops, including Frio, Catahoula, Yegua, Wilcox.
Its lease has reported 92.4K barrels of oil and 137K mcf of gas since June 2014, last reporting in July 2026.
Operator of record
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 Oct 2024 |
| Latest permit | Castlerock EF Operating LLCApr 28, 2014 |
- 11,000
- total depth, ft
- 2
- permits on file
- Apr 28, 2014
- last permit issued
- Jun 30, 2014
- completed
- 92.4K
- cumulative oil, bbl
- 137K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jun 2014 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jun 30, 2014
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: X
Surface location
28.510201, -98.760468
OpenStreetMap → · Google Maps →
Permit surface location from the RRC GIS record, in McMullen County.
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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Y-Bar East Unit A O-1-18270 | Eagleville (Eagle Ford-1) | Castlerock EF Operating LLC | 1 | 92.4K | 137K | Jun 2014 – Jul 2026 |
Oil, barrels lease total
Last 12 months 0 · prior 12 2,102(-100%)
Gas, mcf lease total
Last 12 months 0 · prior 12 2,165(-100%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Murphy Expl. & Prod. Co. - USAJul 2014 → Jul 2022
- 2Castlerock EF Operating LLCOct 2022 → Sep 2024
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 784402-98 | Drill | Castlerock EF Operating LLC | Sep 1, 2023 | Apr 28, 2014 | May 3, 2014 | 11,000 |
| 784402-99 | Drill | Murphy Expl. & Prod. Co. - USA | Apr 10, 2014 | Apr 28, 2014 | May 3, 2014 | 10,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-18270 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 337 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| FrioFRIO - DISPOSAL | 1,460 | -1,123 |
| CatahoulaCATAHOULA - DISPOSAL | 1,590 | -1,253 |
| YeguaYEGUA - DISPOSAL | 2,890 | -2,553 |
| WilcoxWILCOX - DISPOSAL | 4,750 | -4,413 |
| Navarro | 6,611 | -6,274 |
| NavarroNAVARRO- ESCONDIDO | 6,611 | -6,274 |
| Olmos | 7,530 | -7,193 |
| Escondido | 8,340 | -8,003 |
| Undiff Chalk | 8,988 | -8,651 |
| Anacacho | 9,054 | -8,717 |
| Austin Chalk | 9,176 | -8,839 |
| Eagle FordEAGLE FORD - H2S | 9,756 | -9,419 |
| Buda | — | — |
| Catahoula | — | — |
| Frio | — | — |
| Wilcox | — | — |
| Yegua | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 10,062 | 14,756 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 4,375 | 12.25 | 1,461 S |
| 5.5 | 14,854 | 7.875 | 1,410 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 | Sep 8, 2023 | Aug 30, 2023 | — |
| 00 | Mar 31, 2022 | Mar 15, 2022 | — |
| 00 | Jun 15, 2015 | Jan 27, 2015 | Yes |
| 00 | Jun 3, 2015 | Aug 11, 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 42-311-36018 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-311-36018 → 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.
Nearby wells and their tops
NEAREST 8 LOCATED WELLS WITH TOPS · WITHIN 16 KM
Draw a cross-section
This well's tops beside its 5 nearest neighbours, subsea-aligned so they line up regardless of surface terrain.
Y-Bar East42-311-36019
0.0 KM · Murphy Expl. & Prod. Co. - USA · Section with this well →
| Frio | 1,460 | -1,123 |
| Catahoula | 1,590 | -1,253 |
| Yegua | 2,890 | -2,553 |
| Wilcox | 4,061 | -3,724 |
| Navarro | 6,457 | -6,120 |
| Olmos | 7,494 | -7,157 |
| Escondido | 8,340 | -8,003 |
| Undiff Chalk | 8,951 | -8,614 |
15 TOPS · FIRST 8
CRX Ybar A42-311-37413
1.4 KM · Castlerock EF Operating LLC · Section with this well →
| Anacacho | 9,275 | -8,951 |
| Austin Chalk | 9,857 | -9,533 |
| Eagle Ford | 9,897 | -9,573 |
| Navarro | — | |
| Frio | — | |
| Escondido | — | |
| Catahoula | — | |
| Wilcox | — |
10 TOPS · FIRST 8
CRX Ybar42-311-37412
1.4 KM · Castlerock EF Operating LLC · Section with this well →
| Anacacho | 9,238 | -8,914 |
| Austin Chalk | 9,839 | -9,515 |
| Eagle Ford | 9,882 | -9,558 |
| Yegua | — | |
| Catahoula | — | |
| Escondido | — | |
| Frio | — | |
| Navarro | — |
10 TOPS · FIRST 8
CRX Ybar42-311-37411
1.4 KM · Castlerock EF Operating LLC · Section with this well →
| Anacacho | 9,227 | -8,904 |
| Eagle Ford | 9,867 | -9,544 |
| Austin Chalk | 9,969 | -9,646 |
| Navarro | — | |
| Olmos | — | |
| Wilcox | — | |
| Catahoula | — | |
| Escondido | — |
10 TOPS · FIRST 8
CRX Ybar42-311-37218
1.6 KM · Castlerock EF Operating LLC · Section with this well →
| Anacacho | 9,731 | -9,406 |
| Austin Chalk | 9,809 | -9,484 |
| Eagle Ford | 9,850 | -9,525 |
| Frio | — | |
| Navarro | — | |
| Olmos | — | |
| Yegua | — | |
| Wilcox | — |
10 TOPS · FIRST 8
CRX Ybar42-311-37217
1.6 KM · Castlerock EF Operating LLC · Section with this well →
| Anacacho | 9,721 | -9,396 |
| Austin Chalk | 9,799 | -9,474 |
| Eagle Ford | 9,840 | -9,515 |
| Frio | — | |
| Catahoula | — | |
| Escondido | — | |
| Navarro | — | |
| Olmos | — |
10 TOPS · FIRST 8
CRX Ybar42-311-37216
1.6 KM · Castlerock EF Operating LLC · Section with this well →
| Austin Chalk | 9,788 | -9,463 |
| Eagle Ford | 9,830 | -9,505 |
| Anacacho | — | |
| Yegua | — | |
| Catahoula | — | |
| Escondido | — | |
| Frio | — | |
| Navarro | — |
10 TOPS · FIRST 8
River Lowe Ranch42-311-37000
1.6 KM · EOG Resources, Inc. · Section with this well →
| Yegua | 422 | -107 |
| Wilcox | 2,944 | -2,629 |
| Carrizo | 3,038 | -2,723 |
| Escondido | 6,542 | -6,227 |
| Navarro | 6,542 | -6,227 |
| Olmos | 7,674 | -7,359 |
| Anacacho | 9,286 | -8,971 |
| Austin Chalk | 9,813 | -9,498 |
11 TOPS · FIRST 8
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/31136018, documented in the API reference.