WELL · 42-311-37412 · DISTRICT 1
CRX Ybar #9H
McMullen County · Eagleville (Eagle Ford-1) field · Producing · Horizontal
Crx Ybar #9H (API 42-311-37412) is a horizontal well in Mcmullen County operated by Castlerock EF Operating LLC, completed December 14, 2023 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued September 1, 2023, permitted to 14,000 ft.
Completion filings report 10 formation tops, including Anacacho, Austin Chalk, Eagle Ford, Catahoula.
Its lease has reported 1.05M barrels of oil and 1.31M mcf of gas since May 2022, last reporting in July 2026. The lease carries 5 wells, so these are lease totals, not this well alone.
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 Apr 2026 |
| Latest permit | Castlerock EF Operating LLCSep 1, 2023 |
- 14,000
- total depth, ft
- 1
- permits on file
- Sep 1, 2023
- last permit issued
- Dec 14, 2023
- completed
- 1.05M
- cumulative oil, bbl
- 1.31M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · May 2022 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Dec 14, 2023
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: X
Surface location
28.498099, -98.761657
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; they carry 5 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| CRX Ybar O-1-20805 | Eagleville (Eagle Ford-1) | Castlerock EF Operating LLC | 5 | 1.05M | 1.31M | May 2022 – Jul 2026 |
Oil, barrels lease total
Last 12 months 110,668 · prior 12 224,078(-51%)
Gas, mcf lease total
Last 12 months 256,955 · prior 12 434,015(-41%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Castlerock EF Operating LLCAug 2022 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 893210-99 | Drill | Castlerock EF Operating LLC | Aug 24, 2023 | Sep 1, 2023 | Sep 15, 2023 | 14,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-20805 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 324 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Anacacho | 9,238 | -8,914 |
| Austin Chalk | 9,839 | -9,515 |
| Eagle FordEAGLE FORD - H2S | 9,882 | -9,558 |
| CatahoulaCATAHOULA - DISPOSAL | — | — |
| Escondido | — | — |
| FrioFRIO - DISPOSAL | — | — |
| Navarro | — | — |
| Olmos | — | — |
| WilcoxWILCOX - DISPOSAL | — | — |
| YeguaYEGUA - DISPOSAL | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 10,197 | 19,587 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 4,278 | 12.25 | 1,000 S |
| 5.5 | 19,678 | 8.75 | 2,855 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 | Feb 28, 2024 | Feb 19, 2024 | 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 42-311-37412 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-311-37412 → 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.
CRX Ybar42-311-37411
0.0 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 |
| Wilcox | — | |
| Navarro | — | |
| Frio | — | |
| Escondido | — | |
| Catahoula | — |
10 TOPS · FIRST 8
CRX Ybar A42-311-37413
0.0 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 |
| Yegua | — | |
| Navarro | — | |
| Frio | — | |
| Escondido | — | |
| Catahoula | — |
10 TOPS · FIRST 8
River Lowe Ranch42-311-37000
0.3 KM · EOG Resources, Inc. · Section with this well →
| Yegua | 422 | -107 |
| Wilcox | 2,944 | -2,629 |
| Carrizo | 3,038 | -2,723 |
| Navarro | 6,542 | -6,227 |
| Escondido | 6,542 | -6,227 |
| Olmos | 7,674 | -7,359 |
| Anacacho | 9,286 | -8,971 |
| Austin Chalk | 9,813 | -9,498 |
11 TOPS · FIRST 8
River Lowe Ranch42-311-36999
0.3 KM · EOG Resources, Inc. · Section with this well →
| Yegua | 418 | -103 |
| Wilcox | 2,940 | -2,625 |
| Navarro | 6,536 | -6,221 |
| Escondido | 6,536 | -6,221 |
| Olmos | 7,669 | -7,354 |
| Anacacho | 9,269 | -8,954 |
| Austin Chalk | 9,811 | -9,496 |
| Eagle Ford | 9,879 | -9,564 |
10 TOPS · FIRST 8
River Lowe Ranch42-311-36998
0.3 KM · EOG Resources, Inc. · Section with this well →
| Yegua | 411 | -96 |
| Wilcox | 2,933 | -2,618 |
| Escondido | 6,530 | -6,215 |
| Navarro | 6,530 | -6,215 |
| Olmos | 7,662 | -7,347 |
| Anacacho | 9,282 | -8,967 |
| Austin Chalk | 9,802 | -9,487 |
| Eagle Ford | 9,849 | -9,534 |
10 TOPS · FIRST 8
River Lowe Ranch42-311-36763
0.6 KM · EOG Resources, Inc. · Section with this well →
| Yegua | 467 | -154 |
| Wilcox | 2,989 | -2,676 |
| Carrizo | 3,083 | -2,770 |
| Navarro | 6,585 | -6,272 |
| Olmos | 7,717 | -7,404 |
| Anacacho | 9,341 | -9,028 |
| Austin Chalk | 9,852 | -9,539 |
| Eagle Ford | 9,893 | -9,580 |
11 TOPS · FIRST 8
CRX Ybar42-311-37218
0.6 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 |
| Catahoula | — | |
| Escondido | — | |
| Frio | — | |
| Navarro | — | |
| Olmos | — |
10 TOPS · FIRST 8
CRX Ybar42-311-37217
0.6 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 |
| Catahoula | — | |
| Escondido | — | |
| Frio | — | |
| Navarro | — | |
| Olmos | — |
10 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/31137412, documented in the API reference.