TEXAS · WELLS · ATASCOSA COUNTY · SAN MARCOS UNIT LEASE · API 42-013-35263 · DISTRICT 01
San Marcos Unit #1H
Atascosa County · Briscoe Ranch (Eagleford) field · Producing · Horizontal
San Marcos Unit #1H (API 42-013-35263) is a horizontal well in Atascosa County operated by Javelin Energy Partners Mgmt LLC, completed March 17, 2015 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued December 17, 2014, permitted to 7,681 ft.
It was permitted by Cabot Oil & Gas Corporation and has since transferred to Javelin Energy Partners Mgmt LLC on the wellbore schedule.
Completion filings report 10 formation tops, including Reklaw, Carrizo, Wilcox, Bartosh.
Its lease has reported 209K barrels of oil and 199K mcf of gas since March 2015, last reporting in July 2026. The lease carries 2 wells, so these are lease totals, not this well alone.
Operator of record
Javelin Energy Partners Mgmt LLC
Permitted by Cabot Oil & Gas Corporation; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active (A)
- P-5 last filed
- Feb 24, 2026
- Permits on file
- 233
- Phone
- (469) 575-3800
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 | Cabot Oil & Gas CorporationDec 17, 2014 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 7,681
- total depth, ft
- 2
- permits on file
- Dec 17, 2014
- last permit issued
- Mar 17, 2015
- completed
- 209K
- cumulative oil, bbl
- 199K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Mar 2015 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Mar 17, 2015
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
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 |
|---|---|---|---|---|---|---|
| San Marcos Unit O-1-18430 | Briscoe Ranch (Eagleford) | Javelin Energy Partners Mgmt LLC | 2 | 209K | 199K | Mar 2015 – Jul 2026 |
Oil, barrels lease total
Last 12 months 601 · prior 12 3,522(-83%)
Gas, mcf lease total
Last 12 months 461 · prior 12 2,123(-78%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Cabot Oil & Gas CorporationMar 2015 → Jan 2018
- 2Venado Operating Company LLCFeb 2018 → Mar 2022
- 3Javelin Energy Partners Mgmt LLCApr 2022 → Mar 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 801791-98 | Drill | Cabot Oil & Gas Corporation | May 1, 2015 | Dec 17, 2014 | Jan 22, 2015 | 8,000 |
| 801791-99 | Drill | Cabot Oil & Gas Corporation | Dec 16, 2014 | Dec 17, 2014 | Jan 22, 2015 | 8,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Mar 17, 2015 | San Marcos Unit O-1-18430 | Briscoe Ranch (Eagleford) | Javelin Energy Partners Mgmt LLC | Producing | 7,681 |
Formation tops
As filed on W-2/G-1. Subsea from 432 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Reklaw | 1,907 | -1,475 |
| Carrizo | 1,931 | -1,499 |
| WilcoxWILCOX - DISPOSAL | 2,062 | -1,630 |
| Bartosh | 3,008 | -2,576 |
| EscondidoESCONDIDO - H2S, DISPOSAL | 4,439 | -4,007 |
| NavarroNAVARRO - H2S | 4,660 | -4,228 |
| OlmosOLMOS - DISPOSAL | 5,694 | -5,262 |
| AnacachoANACACHO - H2S | 6,770 | -6,338 |
| Austin ChalkAUSTIN CHALK - H2S, DISPOSAL | 7,266 | -6,834 |
| Eagle FordEAGLE FORD - H2S | 7,434 | -7,002 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,673 | 11,854 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 4,116 | 13.5 | 1,919 S |
| 5.5 | 11,945 | 8.75 | 1,726 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 | Oct 6, 2015 | May 6, 2015 | 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 42-013-35263 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-013-35263 → 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/01335263, documented in the API reference.