WELL · 42-013-35487 · DISTRICT 1
Chester Unit #1H
Atascosa County · Eagleville (Eagle Ford-1) field · Producing · Horizontal
Chester Unit #1H (API 42-013-35487) is a horizontal well in Atascosa County operated by Trailblazer Energy Resources LLC, completed November 20, 2017 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued June 15, 2017, 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 206K barrels of oil and 136K mcf of gas since November 2017, last reporting in July 2026.
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, LLCJun 15, 2017 |
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
- 1
- permits on file
- Jun 15, 2017
- last permit issued
- Nov 20, 2017
- completed
- 206K
- cumulative oil, bbl
- 136K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Nov 2017 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Nov 20, 2017
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active
Surface location
28.818460, -98.673135
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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Chester Unit O-1-19265 | Eagleville (Eagle Ford-1) | Trailblazer Energy Resources,llc | 1 | 206K | 136K | Nov 2017 – Jul 2026 |
Oil, barrels lease total
Last 12 months 7,309 · prior 12 9,222(-21%)
Gas, mcf lease total
Last 12 months 2,754 · prior 12 4,266(-35%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Cinco Oil & Gas, LLCNov 2017 → Jan 2026
- 2Trailblazer Energy Resources,llcFeb 2026 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 827371-99 | Drill | Cinco Oil & Gas, LLC | Jun 1, 2017 | Jun 15, 2017 | Jun 26, 2017 | 9,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-19265 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 530 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Queen City | 268 | 262 |
| Reklaw | 1,116 | -586 |
| Carrizo | 1,384 | -854 |
| WilcoxWILCOX - DISPOSAL | 2,378 | -1,848 |
| NavarroNAVARRO - H2S | 4,687 | -4,157 |
| OlmosOLMOS - DISPOSAL | 5,576 | -5,046 |
| AnacachoANACACHO - H2S | 6,853 | -6,323 |
| Austin ChalkAUSTIN CHALK - H2S, DISPOSAL | 7,169 | -6,639 |
| Bartosh | — | — |
| EscondidoESCONDIDO - H2S, DISPOSAL | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,598 | 14,998 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 4,038 | 12.25 | 966 S |
| 5.5 | 15,068 | 8.75 | 2,354 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 | Jun 8, 2018 | Mar 2, 2018 | 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 42-013-35487 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-013-35487 → 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.
Catfish Unit42-013-35486
0.0 KM · Cinco Oil & Gas, LLC · Section with this well →
| Queen City | 263 | 267 |
| Reklaw | 1,111 | -581 |
| Carrizo | 1,379 | -849 |
| Wilcox | 2,373 | -1,843 |
| Navarro | 4,682 | -4,152 |
| Olmos | 5,603 | -5,073 |
| Anacacho | 6,852 | -6,322 |
| Austin Chalk | 7,177 | -6,647 |
10 TOPS · FIRST 8
Layla SWD42-013-35499
1.3 KM · Goodnight Midstream Permian, LLC · Section with this well →
| Queen City | 235 | 270 |
| Reklaw | 1,083 | -578 |
| Carrizo | 1,351 | -846 |
| Wilcox | 3,095 | -2,590 |
| Navarro | 4,611 | -4,106 |
| Olmos | 5,544 | -5,039 |
| Anacacho | 6,845 | -6,340 |
| Austin Chalk | 7,171 | -6,666 |
10 TOPS · FIRST 8
Lone Star a Unit42-013-35914
2.3 KM · Texas American Resources Company · Section with this well →
| Escondido | 4,899 | -4,394 |
| Olmos | 5,796 | -5,291 |
| Anacacho | 7,087 | -6,582 |
| Austin Chalk | 7,311 | -6,806 |
| Queen City | — | |
| Bartosh | — | |
| Navarro | — | |
| Reklaw | — |
10 TOPS · FIRST 8
Lone Star B Unit42-013-35915
2.3 KM · Texas American Resources Company · Section with this well →
| Escondido | 4,907 | -4,402 |
| Olmos | 5,825 | -5,320 |
| Reklaw | — | |
| Wilcox | — | |
| Queen City | — | |
| Navarro | — | |
| Carrizo | — | |
| Bartosh | — |
10 TOPS · FIRST 8
Lone Star C Unit42-013-35916
2.3 KM · Texas American Resources Company · Section with this well →
| Escondido | 4,933 | -4,428 |
| Olmos | 5,823 | -5,318 |
| Anacacho | 7,064 | -6,559 |
| Austin Chalk | 7,289 | -6,784 |
| Navarro | — | |
| Reklaw | — | |
| Wilcox | — | |
| Bartosh | — |
10 TOPS · FIRST 8
Hughes Unit42-013-35488
2.7 KM · Cinco Oil & Gas, LLC · Section with this well →
| Queen City | 196 | 322 |
| Reklaw | 1,044 | -526 |
| Reklaw | 1,044 | -526 |
| Carrizo | 1,312 | -794 |
| Carrizo | 1,312 | -794 |
| Wilcox | 2,306 | -1,788 |
| Wilcox | 2,306 | -1,788 |
| Wilcox | 3,056 | -2,538 |
19 TOPS · FIRST 8
Hughes Unit42-013-35489
2.7 KM · Cinco Oil & Gas, LLC · Section with this well →
| Queen City | 196 | 323 |
| Reklaw | 1,044 | -525 |
| Carrizo | 1,312 | -793 |
| Wilcox | 2,306 | -1,787 |
| Wilcox | 2,318 | -1,799 |
| Wilcox | 3,068 | -2,549 |
| Midway | 4,023 | -3,504 |
| Navarro | 4,670 | -4,151 |
13 TOPS · FIRST 8
Fisher et al Unit42-013-34757
3.1 KM · Virtex Operating Company, Inc. · Section with this well →
| Olmos | 5,450 | -4,940 |
| Anacacho | 6,480 | -5,970 |
| Austin Chalk | 6,588 | -6,078 |
| Austin Chalk | 6,588 | -6,078 |
| Eagle Ford | 6,974 | -6,464 |
| Buda | 7,208 | -6,698 |
| Escondido | — | |
| Carrizo | — |
13 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/01335487, documented in the API reference.