WELL · 42-177-34614 · DISTRICT 2
Barnhart (Ef)-J.M. Preston SA2 #117H
Gonzales County · Eagleville (Eagle Ford-2) field · Producing · Horizontal
Barnhart (EF)-J.M. Preston Sa2 #117H (API 42-177-34614) is a horizontal well in Gonzales County operated by Marathon Oil EF LLC, completed October 31, 2023 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued December 11, 2023, permitted to 24,000 ft.
Completion filings report 10 formation tops, including Sparta, Queen City, Reklaw, Carrizo.
Its lease has reported 379K barrels of oil and 268K mcf of gas since October 2023, last reporting in July 2026.
Operator of record
- Based in
- Houston, TX
- P-5 status
- Active (A)
- P-5 last filed
- Sep 26, 2025
- Permits on file
- 3,191
- Phone
- (832) 486-2737
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 | Marathon Oil EF LLCDec 11, 2023 |
- 24,000
- total depth, ft
- 2
- permits on file
- Dec 11, 2023
- last permit issued
- Oct 31, 2023
- completed
- 379K
- cumulative oil, bbl
- 268K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Oct 2023 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Oct 31, 2023
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
Surface location
29.284416, -97.483729
Permit surface location from the RRC GIS record, in Gonzales 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 |
|---|---|---|---|---|---|---|
| Barnhart (Ef)-J.M. Preston SA2 O-2-12713 | Eagleville (Eagle Ford-2) | Marathon Oil EF LLC | 1 | 379K | 268K | Oct 2023 – Jul 2026 |
Oil, barrels lease total
Last 12 months 62,368 · prior 12 142,275(-56%)
Gas, mcf lease total
Last 12 months 48,634 · prior 12 113,755(-57%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Marathon Oil EF LLCOct 2023 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 890224-98 | Drill | Marathon Oil EF LLC | Jan 12, 2024 | Dec 11, 2023 | Oct 1, 2023 | 14,000 |
| 890224-99 | Drill | Marathon Oil EF LLC | May 1, 2023 | Dec 11, 2023 | Jun 3, 2023 | 24,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-2-12713 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 224 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Sparta | 1,168 | -944 |
| Queen City | 1,817 | -1,593 |
| Reklaw | 2,104 | -1,880 |
| Carrizo | 2,648 | -2,424 |
| WilcoxWILCOX - DISPOSAL | 2,901 | -2,677 |
| Anacacho | 8,658 | -8,434 |
| Austin ChalkAUSTIN CHALK - H2S | 8,776 | -8,552 |
| Eagle FordEAGLE FORD - H2S | 9,249 | -9,025 |
| BudaBUDA - H2S, DISPOSAL | — | — |
| Navarro | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,638 | 19,954 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 4,623 | 12.25 | 1,319 S |
| 6 | 19,954 | 8.75 | 3,161 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 24, 2024 | Dec 20, 2023 | 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 42-177-34614 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-177-34614 → 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 neighbors, subsea-aligned so they line up regardless of surface terrain.
J.M. Preston Unit42-177-34236
1.1 KM · EOG Resources, Inc. · Section with this well →
| Reklaw | 2,385 | -2,169 |
| Wilcox | 3,077 | -2,861 |
| Carrizo | 3,178 | -2,962 |
| Navarro | 7,929 | -7,713 |
| Anacacho | 9,625 | -9,409 |
| Austin Chalk | 9,989 | -9,773 |
| Austin Chalk | 9,989 | -9,773 |
| Eagle Ford | 10,393 | -10,177 |
11 TOPS · FIRST 8
J.M. Preston Unit42-177-34235
1.1 KM · EOG Resources, Inc. · Section with this well →
| Reklaw | 2,408 | -2,192 |
| Wilcox | 3,100 | -2,884 |
| Carrizo | 3,201 | -2,985 |
| Navarro | 7,927 | -7,711 |
| Anacacho | 9,588 | -9,372 |
| Austin Chalk | 9,981 | -9,765 |
| Eagle Ford | 10,384 | -10,168 |
| Edwards | — |
9 TOPS · FIRST 8
J.M. Preston Unit42-177-34234
1.1 KM · EOG Resources, Inc. · Section with this well →
| Reklaw | 2,424 | -2,208 |
| Wilcox | 3,116 | -2,900 |
| Carrizo | 3,217 | -3,001 |
| Navarro | 7,944 | -7,728 |
| Anacacho | 9,621 | -9,405 |
| Austin Chalk | 9,974 | -9,758 |
| Eagle Ford | 10,386 | -10,170 |
| Buda | — |
9 TOPS · FIRST 8
J.M. Preston Unit42-177-33995
1.4 KM · EOG Resources, Inc. · Section with this well →
| Reklaw | 2,439 | -2,199 |
| Wilcox | 3,131 | -2,891 |
| Carrizo | 3,232 | -2,992 |
| Navarro | 7,987 | -7,747 |
| Anacacho | 9,613 | -9,373 |
| Austin Chalk | 10,014 | -9,774 |
| Eagle Ford | 10,452 | -10,212 |
| Edwards | — |
9 TOPS · FIRST 8
Pinnacles B42-177-33999
1.4 KM · EOG Resources, Inc. · Section with this well →
| Reklaw | 2,455 | -2,215 |
| Wilcox | 3,147 | -2,907 |
| Carrizo | 3,248 | -3,008 |
| Navarro | 8,003 | -7,763 |
| Anacacho | 9,632 | -9,392 |
| Austin Chalk | 10,017 | -9,777 |
| Eagle Ford | 10,462 | -10,222 |
| Edwards | — |
9 TOPS · FIRST 8
Pinnacles A42-177-33998
1.4 KM · EOG Resources, Inc. · Section with this well →
| Reklaw | 2,474 | -2,234 |
| Wilcox | 3,166 | -2,926 |
| Carrizo | 3,267 | -3,027 |
| Navarro | 8,022 | -7,782 |
| Anacacho | 9,627 | -9,387 |
| Austin Chalk | 10,021 | -9,781 |
| Eagle Ford | 10,447 | -10,207 |
| Edwards | — |
9 TOPS · FIRST 8
Barnhart (EF)42-177-34608
2.4 KM · Marathon Oil EF LLC · Section with this well →
| Sparta | 1,245 | -1,023 |
| Queen City | 2,441 | -2,219 |
| Reklaw | 2,719 | -2,497 |
| Carrizo | 3,298 | -3,076 |
| Wilcox | 3,499 | -3,277 |
| Anacacho | 9,770 | -9,548 |
| Austin Chalk | 9,929 | -9,707 |
| Eagle Ford | 10,496 | -10,274 |
11 TOPS · FIRST 8
Barnhart (EF)42-177-34607
2.5 KM · Marathon Oil EF LLC · Section with this well →
| Sparta | 1,245 | -1,023 |
| Reklaw | 2,719 | -2,497 |
| Carrizo | 3,298 | -3,076 |
| Wilcox | 3,499 | -3,277 |
| Anacacho | 9,757 | -9,535 |
| Anacaco | 9,757 | -9,535 |
| Austin Chalk | 9,945 | -9,723 |
| Eagle Ford | 10,486 | -10,264 |
11 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
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