WELL · 42-311-37503 · DISTRICT 1
Cobra 10C #12H
McMullen County · Eagleville (Eagle Ford-1) field · Producing · Horizontal
Cobra 10c #12H (API 42-311-37503) is a horizontal well in Mcmullen County operated by Javelin Energy Partners Mgmt LLC, completed October 11, 2024 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued April 5, 2024, permitted to 10,000 ft.
It was permitted by Ridgemar Energy Operating, LLC and has since transferred to Javelin Energy Partners Mgmt LLC on the wellbore schedule.
Completion filings report 10 formation tops, including Anacacho, Austin Chalk, Eagle Ford, Buda.
Its lease has reported 107K barrels of oil and 111K mcf of gas since October 2024, last reporting in July 2026.
Operator of record
Javelin Energy Partners Mgmt LLC
Permitted by Ridgemar Energy Operating, LLC; the EWA schedule now lists a different operator.
Houston, TX · P-5 Y, filed Jan 4, 2026 · 233 permits on file · (888) 973-7780
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Javelin Energy Partners Mgmt LLC |
| Production reports | Javelin Energy Partners Mgmt LLCthrough Mar 2026 |
| Latest permit | Ridgemar Energy Operating, LLCApr 5, 2024 |
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
- Apr 5, 2024
- last permit issued
- Oct 11, 2024
- completed
- 107K
- cumulative oil, bbl
- 111K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Oct 2024 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Oct 11, 2024
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: X
Surface location
28.640991, -98.504948
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 |
|---|---|---|---|---|---|---|
| Cobra 10C O-1-21568 | Eagleville (Eagle Ford-1) | Javelin Energy Partners Mgmt LLC | 1 | 107K | 111K | Oct 2024 – Jul 2026 |
Oil, barrels lease total
Last 12 months 40,144 · prior 12 66,543(-40%)
Gas, mcf lease total
Last 12 months 53,866 · prior 12 56,938(-5%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Ridgemar Energy Operating, LLCOct 2024 → Jan 2025
- 2Javelin Energy Partners Mgmt LLCFeb 2025 → Mar 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 898534-99 | Drill | Ridgemar Energy Operating, LLC | Apr 2, 2024 | Apr 5, 2024 | Apr 23, 2024 | 10,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-21568 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 337 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Anacacho | 9,346 | -9,009 |
| Austin Chalk | 9,712 | -9,375 |
| Eagle FordEAGLE FORD - H2S | 9,902 | -9,565 |
| BudaBUDA - H2S | — | — |
| Escondido | — | — |
| FrioFRIO - DISPOSAL | — | — |
| Navarro | — | — |
| Olmos | — | — |
| WilcoxWILCOX - DISPOSAL | — | — |
| YeguaYEGUA - DISPOSAL | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 10,177 | 17,953 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 4,550 | 12.25 | 1,495 S |
| 5.5 | 17,970 | 8.75 | 2,180 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 | Nov 26, 2024 | Nov 13, 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 42-311-37503 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-311-37503 → 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.
Cobra 10D42-311-37504
0.0 KM · Ridgemar Energy Operating, LLC · Section with this well →
| Anacacho | 9,373 | -9,036 |
| Austin Chalk | 9,738 | -9,401 |
| Eagle Ford | 9,924 | -9,587 |
| Catahoula | — | |
| Yegua | — | |
| Wilcox | — | |
| Olmos | — | |
| Navarro | — |
10 TOPS · FIRST 8
Cobra 10B42-311-37502
0.0 KM · Ridgemar Energy Operating, LLC · Section with this well →
| Anacacho | 9,337 | -9,000 |
| Austin Chalk | 9,704 | -9,367 |
| Eagle Ford | 9,891 | -9,554 |
| Navarro | — | |
| Escondido | — | |
| Yegua | — | |
| Frio | — | |
| Catahoula | — |
10 TOPS · FIRST 8
Cobra 10A42-311-37501
0.0 KM · Ridgemar Energy Operating, LLC · Section with this well →
| Anacacho | 9,322 | -8,986 |
| Austin Chalk | 9,693 | -9,357 |
| Eagle Ford | 9,882 | -9,546 |
| Catahoula | — | |
| Wilcox | — | |
| Frio | — | |
| Navarro | — | |
| Olmos | — |
10 TOPS · FIRST 8
Sage Geosystems Smeci42-013-36202
1.3 KM · Sage Geosystems Inc. · Section with this well →
| Queen City | 1,688 | -1,376 |
| Reklaw | 2,669 | -2,357 |
| Carrizo | 3,019 | -2,707 |
| Wilcox | 3,239 | -2,927 |
| Escondido | 6,922 | -6,610 |
| Olmos | 7,724 | -7,412 |
| Anacacho | 9,295 | -8,983 |
Mustang42-311-36740
2.1 KM · Carrizo (Eagle Ford) LLC · Section with this well →
| Wilcox | 4,630 | -4,286 |
| Midway | 4,630 | -4,286 |
| Escondido | 7,172 | -6,828 |
| Olmos | 7,993 | -7,649 |
| Austin Chalk | 9,613 | -9,269 |
| Eagle Ford | 10,153 | -9,809 |
| Yegua | — | |
| Navarro | — |
11 TOPS · FIRST 8
Mustang42-311-36742
2.1 KM · Carrizo (Eagle Ford) LLC · Section with this well →
| Midway | 4,632 | -4,289 |
| Escondido | 7,175 | -6,832 |
| Olmos | 7,998 | -7,655 |
| Austin Chalk | 9,618 | -9,275 |
| Eagle Ford | 10,161 | -9,818 |
| Navarro | — | |
| Wilcox | — | |
| Yegua | — |
11 TOPS · FIRST 8
Mustang42-311-36743
2.1 KM · Carrizo (Eagle Ford) LLC · Section with this well →
| Escondido | 7,191 | -6,848 |
| Olmos | 8,008 | -7,665 |
| Austin Chalk | 9,636 | -9,293 |
| Eagle Ford | 10,173 | -9,830 |
| Catahoula | — | |
| Yegua | — | |
| Wilcox | — | |
| Navarro | — |
10 TOPS · FIRST 8
Gran Torino A42-311-36744
2.1 KM · Carrizo (Eagle Ford) LLC · Section with this well →
| Wilcox | 4,550 | -4,207 |
| Midway | 4,551 | -4,208 |
| Escondido | 7,207 | -6,864 |
| Olmos | 8,018 | -7,675 |
| Austin Chalk | 9,624 | -9,281 |
| Eagle Ford | 10,185 | -9,842 |
| Frio | — | |
| Anacacho | — |
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/31137503, documented in the API reference.