WELL · 42-013-35663 · DISTRICT 1
Heard Bower West Unit #18H
Atascosa County · Eagleville (Eagle Ford-1) field · Producing · Horizontal
Heard Bower West Unit #18H (API 42-013-35663) is a horizontal well in Atascosa County operated by Marathon Oil EF LLC, completed July 24, 2019 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued November 1, 2018, permitted to 11,000 ft.
It was permitted by Teal Operating, LLC and has since transferred to Marathon Oil EF LLC on the wellbore schedule.
Completion filings report 10 formation tops, including Carrizo, Anacacho, Austin Chalk, Bartosh.
Its lease has reported 1.26M barrels of oil and 1.48M mcf of gas since September 2011, last reporting in July 2026. The lease carries 9 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Teal Operating, LLC; the EWA schedule now lists a different operator.
Houston, TX · P-5 Y, filed Aug 4, 2025 · 3,191 permits on file · (800) 332-9449
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Marathon Oil EF LLC |
| Production reports | Marathon Oil EF LLCthrough Apr 2026 |
| Latest permit | Teal Operating, LLCDec 31, 2018 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 11,000
- total depth, ft
- 2
- permits on file
- Dec 31, 2018
- last permit issued
- Jul 24, 2019
- completed
- 1.26M
- cumulative oil, bbl
- 1.48M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Sep 2011 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jul 24, 2019
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active
Surface location
28.675639, -98.299408
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 9 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Heard Bower West Unit O-1-15760 | Eagleville (Eagle Ford-1) | Marathon Oil EF LLC | 9 | 1.26M | 1.48M | Sep 2011 – Jul 2026 |
Oil, barrels lease total
Last 12 months 21,987 · prior 12 19,548(+12%)
Gas, mcf lease total
Last 12 months 40,364 · prior 12 21,786(+85%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Cinco Natural Resources Corp.Sep 2011 → Feb 2013
- 2Aurora USA Development, LLCMar 2013 → May 2014
- 3Baytex USA Development, LLCJun 2014 → Jun 2016
- 4Teal Operating, LLCJul 2016 → Oct 2021
- 5Marathon Oil EF LLCNov 2021 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 846336-98 | Drill | Teal Operating, LLC | Jul 3, 2019 | Dec 31, 2018 | Jul 10, 2019 | 11,000 |
| 846336-99 | Drill | Teal Operating, LLC | Oct 30, 2018 | Nov 1, 2018 | Jul 10, 2019 | 11,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-15760 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 259 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Carrizo | 3,900 | -3,641 |
| AnacachoANACACHO - H2S | 10,479 | -10,220 |
| Austin ChalkAUSTIN CHALK - H2S, DISPOSAL | 10,775 | -10,516 |
| Bartosh | — | — |
| EscondidoESCONDIDO - H2S, DISPOSAL | — | — |
| NavarroNAVARRO - H2S | — | — |
| OlmosOLMOS - DISPOSAL | — | — |
| Queen City | — | — |
| Reklaw | — | — |
| WilcoxWILCOX - DISPOSAL | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 11,065 | 19,357 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 5,223 | 12.25 | 1,360 S |
| 5.5 | 19,466 | 8.75 | 3,070 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 | Mar 10, 2020 | Nov 5, 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 42-013-35663 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-013-35663 → 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.
Heard Bower West Unit42-013-35664
0.1 KM · Teal Operating, LLC · Section with this well →
| Carrizo | 3,900 | -3,641 |
| Anacacho | 10,479 | -10,220 |
| Austin Chalk | 10,775 | -10,516 |
| Queen City | — | |
| Escondido | — | |
| Olmos | — | |
| Wilcox | — | |
| Reklaw | — |
10 TOPS · FIRST 8
Guajillo Unit 13 South42-013-35842
0.3 KM · Marathon Oil EF LLC · Section with this well →
| Queen City | 2,517 | -2,267 |
| Reklaw | 3,212 | -2,962 |
| Carrizo | 3,857 | -3,607 |
| Wilcox | 5,817 | -5,567 |
| Anacacho | 10,485 | -10,235 |
| Austin Chalk | 10,727 | -10,477 |
| Escondido | — | |
| Navarro | — |
10 TOPS · FIRST 8
Guajillo Unit 13 South42-013-35841
0.3 KM · Marathon Oil EF LLC · Section with this well →
| Queen City | 2,517 | -2,267 |
| Reklaw | 3,212 | -2,962 |
| Carrizo | 3,857 | -3,607 |
| Wilcox | 5,817 | -5,567 |
| Anacacho | 10,494 | -10,244 |
| Austin Chalk | 10,737 | -10,487 |
| Navarro | — | |
| Bartosh | — |
10 TOPS · FIRST 8
Guajillo Unit 13 South42-013-35843
0.3 KM · Marathon Oil EF LLC · Section with this well →
| Queen City | 2,517 | -2,268 |
| Reklaw | 3,212 | -2,963 |
| Carrizo | 3,857 | -3,608 |
| Wilcox | 5,817 | -5,568 |
| Anacacho | 10,474 | -10,225 |
| Austin Chalk | 10,719 | -10,470 |
| Eagle Ford | 10,844 | -10,595 |
| Bartosh | — |
14 TOPS · FIRST 8
Guajillo Unit 13 South42-013-35844
0.3 KM · Marathon Oil EF LLC · Section with this well →
| Queen City | 2,517 | -2,269 |
| Reklaw | 3,212 | -2,964 |
| Carrizo | 3,857 | -3,609 |
| Wilcox | 6,827 | -6,579 |
| Anacacho | 10,458 | -10,210 |
| Austin Chalk | 10,696 | -10,448 |
| Navarro | — | |
| Olmos | — |
10 TOPS · FIRST 8
Heard Bower Central West42-013-35566
0.4 KM · Teal Operating, LLC · Section with this well →
| Midway | 6,972 | -6,672 |
| Olmos | 8,300 | -8,000 |
| Austin Chalk | 10,835 | -10,535 |
| Eagle Ford | 10,867 | -10,567 |
| Bartosh | — | |
| Carrizo | — | |
| Wilcox | — | |
| Navarro | — |
10 TOPS · FIRST 8
Guajillo Unit 14 South42-013-35845
0.6 KM · Marathon Oil EF LLC · Section with this well →
| Queen City | 2,505 | -2,236 |
| Reklaw | 3,210 | -2,941 |
| Carrizo | 3,895 | -3,626 |
| Wilcox | 5,810 | -5,541 |
| Anacacho | 10,457 | -10,188 |
| Austin Chalk | 10,698 | -10,429 |
| Olmos | — | |
| Navarro | — |
10 TOPS · FIRST 8
Guajillo Unit 14 South42-013-35846
0.6 KM · Marathon Oil EF LLC · Section with this well →
| Queen City | 2,505 | -2,237 |
| Reklaw | 3,210 | -2,942 |
| Carrizo | 3,895 | -3,627 |
| Wilcox | 5,125 | -4,857 |
| Anacacho | 10,450 | -10,182 |
| Austin Chalk | 10,686 | -10,418 |
| Escondido | — | |
| Navarro | — |
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/01335663, documented in the API reference.