WELL · 42-013-35566 · DISTRICT 2
Heard Bower Central West #8AC
Atascosa County · Sugarkane (Austin Chalk) field · Shut IN · Horizontal
Heard Bower Central West #8AC (API 42-013-35566) is a horizontal well in Atascosa County operated by Marathon Oil EF LLC, completed March 10, 2022 and listed as shut in on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued January 26, 2018, permitted to 12,000 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 Midway, Olmos, Austin Chalk, Eagle Ford.
Its lease has reported 83.7K barrels of oil and 240K mcf of gas since April 2018, last reporting in July 2026.
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 May 2024 |
| Latest permit | Teal Operating, LLCJan 26, 2018 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 12,000
- total depth, ft
- 2
- permits on file
- Jan 26, 2018
- last permit issued
- Mar 10, 2022
- completed
- 83.7K
- cumulative oil, bbl
- 240K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Apr 2018 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Mar 10, 2022
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active
Surface location
28.674972, -98.294939
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 |
|---|---|---|---|---|---|---|
| Heard Bower Central West O-2-11545 | Sugarkane (Austin Chalk) | Marathon Oil EF LLC | 1 | 83.7K | 240K | Apr 2018 – Jul 2026 |
Oil, barrels lease total
Last 12 months 0 · prior 12 0
Gas, mcf lease total
Last 12 months 0 · prior 12 447(-100%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Teal Operating, LLCApr 2018 → Oct 2021
- 2Marathon Oil EF LLCNov 2021 → Feb 2024
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 835290-98 | Drill | Teal Operating, LLC | Feb 14, 2018 | Jan 26, 2018 | Jan 30, 2018 | 12,000 |
| 835290-99 | Drill | Teal Operating, LLC | Jan 17, 2018 | Jan 26, 2018 | Jan 30, 2018 | 12,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-2-11545 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 300 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Midway | 6,972 | -6,672 |
| Olmos | 8,300 | -8,000 |
| Austin Chalk | 10,835 | -10,535 |
| Eagle Ford | 10,867 | -10,567 |
| Bartosh | — | — |
| Carrizo | — | — |
| NavarroNAVARRO - H2S | — | — |
| Queen City | — | — |
| Reklaw | — | — |
| WilcoxWILCOX - DISPOSAL | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 11,104 | 15,938 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 5,193 | 12.25 | 1,375 S |
| 5.5 | 16,075 | 8.75 | 2,095 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 | May 18, 2022 | May 2, 2022 | — |
| 00 | Oct 23, 2018 | Jun 4, 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 42-013-35566 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-013-35566 → 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 Unit42-013-35663
0.4 KM · Teal Operating, LLC · Section with this well →
| Carrizo | 3,900 | -3,641 |
| Anacacho | 10,479 | -10,220 |
| Austin Chalk | 10,775 | -10,516 |
| Olmos | — | |
| Queen City | — | |
| Reklaw | — | |
| Wilcox | — | |
| Navarro | — |
10 TOPS · FIRST 8
Heard Bower West Unit42-013-35664
0.5 KM · Teal Operating, LLC · Section with this well →
| Carrizo | 3,900 | -3,641 |
| Anacacho | 10,479 | -10,220 |
| Austin Chalk | 10,775 | -10,516 |
| Escondido | — | |
| Navarro | — | |
| Olmos | — | |
| Queen City | — | |
| Reklaw | — |
10 TOPS · FIRST 8
Guajillo Unit 13 South42-013-35841
0.5 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 |
| Olmos | — | |
| Escondido | — |
10 TOPS · FIRST 8
Guajillo Unit 13 South42-013-35842
0.5 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 |
| Olmos | — | |
| Bartosh | — |
10 TOPS · FIRST 8
Guajillo Unit 13 South42-013-35843
0.5 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 |
| Escondido | — |
14 TOPS · FIRST 8
Guajillo Unit 13 South42-013-35844
0.5 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 |
| Escondido | — | |
| Bartosh | — |
10 TOPS · FIRST 8
Guajillo Unit 14 South42-013-35845
1.0 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 |
| Navarro | — | |
| Olmos | — |
10 TOPS · FIRST 8
Guajillo Unit 14 South42-013-35846
1.0 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/01335566, documented in the API reference.