WELL · 42-013-35581 · DISTRICT 1
EC South Unit #1H
Atascosa County · Eagleville (Eagle Ford-1) field · Producing · Horizontal
EC South Unit #1H (API 42-013-35581) is a horizontal well in Atascosa County operated by Trailblazer Energy Resources LLC, completed October 26, 2018 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued April 24, 2018, permitted to 9,000 ft.
It was permitted by Cinco Oil & Gas, LLC and has since transferred to Trailblazer Energy Resources LLC on the wellbore schedule.
Completion filings report 10 formation tops, including Queen City, Reklaw, Carrizo, Wilcox.
Its lease has reported 357K barrels of oil and 227K mcf of gas since October 2018, last reporting in July 2026. The lease carries 2 wells, so these are lease totals, not this well alone.
Operator of record
Trailblazer Energy Resources LLC
Permitted by Cinco Oil & Gas, LLC; the EWA schedule now lists a different operator.
Tulsa, OK · P-5 Y, filed Aug 4, 2025 · 30 permits on file · (866) 598-1407
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Trailblazer Energy Resources LLC |
| Production reports | Trailblazer Energy Resources,llcthrough Apr 2026 |
| Latest permit | Cinco Oil & Gas, LLCApr 24, 2018 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,000
- total depth, ft
- 2
- permits on file
- Apr 24, 2018
- last permit issued
- Oct 26, 2018
- completed
- 357K
- cumulative oil, bbl
- 227K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Oct 2018 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Oct 26, 2018
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active
Surface location
28.758540, -98.671279
OpenStreetMap → · Google Maps →
Permit surface location from the RRC GIS record, in Atascosa 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 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| EC South Unit O-1-19531 | Eagleville (Eagle Ford-1) | Trailblazer Energy Resources,llc | 2 | 357K | 227K | Oct 2018 – Jul 2026 |
Oil, barrels lease total
Last 12 months 13,770 · prior 12 14,323(-4%)
Gas, mcf lease total
Last 12 months 13,414 · prior 12 21,063(-36%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Cinco Oil & Gas, LLCOct 2018 → Jan 2026
- 2Trailblazer Energy Resources,llcFeb 2026 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 838973-98 | Drill | Cinco Oil & Gas, LLC | Jun 6, 2018 | Apr 24, 2018 | Jul 28, 2018 | 9,000 |
| 838973-99 | Drill | Cinco Oil & Gas, LLC | Apr 17, 2018 | Apr 24, 2018 | — | 9,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-19531 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 429 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Queen City | 1,087 | -658 |
| Reklaw | 2,017 | -1,588 |
| Carrizo | 2,069 | -1,640 |
| WilcoxWILCOX - DISPOSAL | 4,074 | -3,645 |
| NavarroNAVARRO - H2S | 5,131 | -4,702 |
| OlmosOLMOS - DISPOSAL | 6,009 | -5,580 |
| AnacachoANACACHO - H2S | 7,445 | -7,016 |
| Austin ChalkAUSTIN CHALK - H2S, DISPOSAL | 7,782 | -7,353 |
| Bartosh | — | — |
| EscondidoESCONDIDO - H2S, DISPOSAL | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,539 | 14,979 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 3,325 | 12.25 | 809 S |
| 5.5 | 15,040 | 8.75 | 2,531 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 12, 2019 | Jan 3, 2019 | 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 42-013-35581 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-013-35581 → 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.
EC South Unit42-013-35582
0.0 KM · Cinco Oil & Gas, LLC · Section with this well →
| Queen City | 1,094 | -664 |
| Reklaw | 2,024 | -1,594 |
| Carrizo | 2,076 | -1,646 |
| Wilcox | 4,081 | -3,651 |
| Navarro | 5,136 | -4,706 |
| Olmos | 6,022 | -5,592 |
| Anacacho | 7,425 | -6,995 |
| Austin Chalk | 7,782 | -7,352 |
10 TOPS · FIRST 8
Bosque 30142-013-35756
2.6 KM · Venado Operating Company LLC · Section with this well →
| Queen City | 1,500 | -1,056 |
| Reklaw | 2,000 | -1,556 |
| Bartosh | 3,000 | -2,556 |
| Carrizo | 3,500 | -3,056 |
| Wilcox | 4,000 | -3,556 |
| Navarro | 4,643 | -4,199 |
| Escondido | 4,992 | -4,548 |
| Olmos | 5,979 | -5,535 |
10 TOPS · FIRST 8
George Long B42-013-34507
3.3 KM · Marathon Oil EF LLC · Section with this well →
| Anacacho | 7,757 | -7,332 |
| Austin Chalk | 8,119 | -7,694 |
| Eagle Ford | 8,273 | -7,848 |
| Queen City | — | |
| Anacacho | — | |
| Austin Chalk | — | |
| Bartosh | — | |
| Carrizo | — |
13 TOPS · FIRST 8
Lone Star East Unit42-013-36127
4.1 KM · Texas American Resources Company · Section with this well →
| Escondido | 5,067 | -4,582 |
| Olmos | 5,960 | -5,475 |
| Anacacho | 7,219 | -6,734 |
| Austin Chalk | 7,436 | -6,951 |
| Carrizo | — | |
| Wilcox | — | |
| Reklaw | — | |
| Queen City | — |
10 TOPS · FIRST 8
Lone Star East Unit42-013-36128
4.1 KM · Texas American Resources Company · Section with this well →
| Escondido | 5,088 | -4,603 |
| Olmos | 5,976 | -5,491 |
| Anacacho | 7,222 | -6,737 |
| Austin Chalk | 7,451 | -6,966 |
| Wilcox | — | |
| Bartosh | — | |
| Carrizo | — | |
| Navarro | — |
10 TOPS · FIRST 8
Bella Unit42-013-35775
4.2 KM · Cinco Oil & Gas, LLC · Section with this well →
| Queen City | 944 | -453 |
| Reklaw | 1,693 | -1,202 |
| Carrizo | 1,981 | -1,490 |
| Wilcox | 2,848 | -2,357 |
| Navarro | 5,250 | -4,759 |
| Olmos | 6,037 | -5,546 |
| Anacacho | 7,408 | -6,917 |
| Austin Chalk | 7,753 | -7,262 |
10 TOPS · FIRST 8
Bella Unit42-013-35774
4.2 KM · Cinco Oil & Gas, LLC · Section with this well →
| Queen City | 975 | -485 |
| Reklaw | 1,725 | -1,235 |
| Carrizo | 2,014 | -1,524 |
| Wilcox | 2,884 | -2,394 |
| Navarro | 5,251 | -4,761 |
| Olmos | 6,047 | -5,557 |
| Anacacho | 7,426 | -6,936 |
| Austin Chalk | 7,766 | -7,276 |
10 TOPS · FIRST 8
Minnie Pearl Unit42-013-35777
4.2 KM · Cinco Oil & Gas, LLC · Section with this well →
| Queen City | 995 | -505 |
| Reklaw | 1,743 | -1,253 |
| Carrizo | 2,031 | -1,541 |
| Wilcox | 2,896 | -2,406 |
| Navarro | 5,258 | -4,768 |
| Olmos | 6,049 | -5,559 |
| Anacacho | 7,467 | -6,977 |
| Austin Chalk | 7,755 | -7,265 |
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/01335581, documented in the API reference.