WELL · 42-255-36036 · DISTRICT 2
Fire Opal Unit AC #1H
Karnes County · Sugarkane (Austin Chalk) field · Horizontal
Fire Opal Unit AC #1H (API 42-255-36036) is a horizontal well in Karnes County operated by Marathon Oil EF LLC, completed July 25, 2018.
The RRC has issued one drilling permit, issued June 21, 2018, permitted to 20,000 ft.
Completion filings report 10 formation tops, including Yegua, Queen City, Reklaw, Carrizo.
Its 2 leases have reported 208K barrels of oil and 511K mcf of gas since July 2018, last reporting in July 2026. The leases carry 2 wells, so these are lease totals, not this well alone.
Operator of record
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 Dec 2025 |
| Latest permit | Marathon Oil EF LLCJun 21, 2018 |
- 20,000
- total depth, ft
- 1
- permits on file
- Jun 21, 2018
- last permit issued
- Jul 25, 2018
- completed
- 208K
- cumulative oil, bbl
- 511K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jul 2018 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jul 25, 2018
- Shut in
- —
- Plugged
- —
Surface location
28.941022, -97.965961
OpenStreetMap → · Google Maps →
Permit surface location from the RRC GIS record, in Karnes County.
Lease production
PDQ LEASE REPORTS · REPORTED THROUGH APR 2026
Texas reports oil by lease, not by well. These are the 2 leases 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 |
|---|---|---|---|---|---|---|
| Fire Opal Unit AC O-2-11622 | Sugarkane (Austin Chalk) | Marathon Oil EF LLC | 1 | 208K | 511K | Oct 2018 – Jul 2026 |
| Fire Opal Unit AC G-2-284982 | Sugarkane (Austin Chalk) | Marathon Oil EF LLC | 1 | 0 | 0 | Jul 2018 – Mar 2019 |
Oil, barrels lease total
Last 12 months 7,646 · prior 12 4,168(+83%)
Gas, mcf lease total
Last 12 months 9,185 · prior 12 17,372(-47%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Marathon Oil EF LLCOct 2018 → Dec 2025
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 841554-99 | Drill | Marathon Oil EF LLC | Jun 21, 2018 | Jun 21, 2018 | Sep 6, 2018 | 20,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-2-284982 | — | — | — | — |
| — | — O-2-11622 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 284 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| YeguaYEGUA - DISPOSAL | 1,281 | -997 |
| Queen City | 3,141 | -2,857 |
| Reklaw | 3,451 | -3,167 |
| Carrizo | 4,166 | -3,882 |
| WilcoxWILCOX - DISPOSAL | 5,353 | -5,069 |
| Austin ChalkAUSTIN CHALK - H2S | 10,509 | -10,225 |
| Eagle FordEAGLE FORD - H2S | — | — |
| EdwardsEDWARDS - H2S | — | — |
| FrioFRIO - DISPOSAL | — | — |
| SligoSLIGO - H2S | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 10,949 | 16,339 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 4,920 | 12.25 | 1,441 S |
| 5.5 | 16,437 | 8.75 | 2,863 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 | Jan 22, 2019 | Nov 16, 2018 | Yes |
| 00 | Nov 5, 2018 | Oct 5, 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 42-255-36036 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-255-36036 → 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.
CRH Unit AC42-255-36022
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,281 | -997 |
| Queen City | 3,141 | -2,857 |
| Reklaw | 3,451 | -3,167 |
| Carrizo | 4,166 | -3,882 |
| Wilcox | 5,353 | -5,069 |
| Austin Chalk | 10,491 | -10,207 |
| Sligo | — | |
| Eagle Ford | — |
10 TOPS · FIRST 8
CRH Unit AC42-255-36024
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,281 | -997 |
| Queen City | 3,141 | -2,857 |
| Reklaw | 3,451 | -3,167 |
| Carrizo | 4,166 | -3,882 |
| Wilcox | 5,353 | -5,069 |
| Austin Chalk | 10,500 | -10,216 |
| Sligo | — | |
| Eagle Ford | — |
10 TOPS · FIRST 8
Hardy Unit AC42-255-36297
0.4 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,185 | -904 |
| Queen City | 3,140 | -2,859 |
| Reklaw | 3,531 | -3,250 |
| Carrizo | 4,034 | -3,753 |
| Wilcox | 5,320 | -5,039 |
| Austin Chalk | 10,533 | -10,252 |
| Edwards | — | |
| Eagle Ford | — |
10 TOPS · FIRST 8
Hardy Unit AC42-255-36298
0.4 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,165 | -884 |
| Queen City | 3,120 | -2,839 |
| Reklaw | 3,511 | -3,230 |
| Carrizo | 4,014 | -3,733 |
| Wilcox | 5,300 | -5,019 |
| Austin Chalk | 10,552 | -10,271 |
| Frio | — | |
| Edwards | — |
10 TOPS · FIRST 8
Trial Unit42-255-35594
0.5 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,237 | -952 |
| Queen City | 3,097 | -2,812 |
| Reklaw | 3,407 | -3,122 |
| Carrizo | 4,122 | -3,837 |
| Wilcox | 5,309 | -5,024 |
| Austin Chalk | 10,405 | -10,120 |
| Eagle Ford | 10,675 | -10,390 |
| Frio | — |
10 TOPS · FIRST 8
Trial-Jauer Pollok SA Unit A42-255-35730
0.5 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,237 | -952 |
| Queen City | 3,097 | -2,812 |
| Reklaw | 3,407 | -3,122 |
| Carrizo | 4,122 | -3,837 |
| Wilcox | 5,309 | -5,024 |
| Austin Chalk | 10,384 | -10,099 |
| Eagle Ford | 10,643 | -10,358 |
| Edwards | — |
10 TOPS · FIRST 8
Trial-Jauer Pollok SA Unit B42-255-35731
0.5 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,237 | -952 |
| Queen City | 3,097 | -2,812 |
| Reklaw | 3,407 | -3,122 |
| Carrizo | 4,122 | -3,837 |
| Wilcox | 5,309 | -5,024 |
| Austin Chalk | 10,355 | -10,070 |
| Eagle Ford | 10,613 | -10,328 |
| Edwards | — |
10 TOPS · FIRST 8
Jauer-Pollok Unit42-255-35727
0.5 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,237 | -952 |
| Queen City | 3,097 | -2,812 |
| Reklaw | 3,407 | -3,122 |
| Carrizo | 4,122 | -3,837 |
| Wilcox | 5,309 | -5,024 |
| Austin Chalk | 10,349 | -10,064 |
| Eagle Ford | 10,612 | -10,327 |
| Frio | — |
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/25536036, documented in the API reference.