WELL · 42-177-34388 · DISTRICT 1
Bilsky Unit #3H
Gonzales County · Eagleville (Eagle Ford-1) field · Producing · Horizontal
Bilsky Unit #3H (API 42-177-34388) is a horizontal well in Gonzales County operated by Marathon Oil EF LLC, completed May 3, 2023 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued April 15, 2021, permitted to 24,000 ft.
Completion filings report 8 formation tops, including Reklaw, Wilcox, Austin Chalk, Eagle Ford.
Its lease has reported 906K barrels of oil and 1.06M mcf of gas since January 2012, last reporting in July 2026. The lease carries 4 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 Apr 2026 |
| Latest permit | Marathon Oil EF LLCApr 15, 2021 |
- 24,000
- total depth, ft
- 1
- permits on file
- Apr 15, 2021
- last permit issued
- May 3, 2023
- completed
- 906K
- cumulative oil, bbl
- 1.06M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 2012 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- May 3, 2023
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active
Surface location
29.413703, -97.261874
OpenStreetMap → · Google Maps →
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; they carry 4 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Bilsky Unit O-1-15720 | Eagleville (Eagle Ford-1) | Marathon Oil EF LLC | 4 | 906K | 1.06M | Jan 2012 – Jul 2026 |
Oil, barrels lease total
Last 12 months 52,806 · prior 12 59,267(-11%)
Gas, mcf lease total
Last 12 months 81,284 · prior 12 78,834(+3%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Marathon Oil EF LLCJan 2012 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 868881-99 | Drill | Marathon Oil EF LLC | Apr 5, 2021 | Apr 15, 2021 | — | 24,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-15720 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 305 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Reklaw | 3,967 | -3,662 |
| WilcoxWILCOX - DISPOSAL | 4,527 | -4,222 |
| Austin ChalkAUSTIN CHALK - H2S | 11,003 | -10,698 |
| Eagle FordEAGLE FORD - H2S | 11,609 | -11,304 |
| BudaBUDA - H2S, DISPOSAL | — | — |
| Carrizo | — | — |
| EdwardsEDWARDS - H2S | — | — |
| Navarro | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 11,909 | 16,696 | Perforated |
| 17,201 | 18,621 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 4,905 | 12.25 | 1,460 S |
| 5.5 | 18,678 | 8.75 | 2,968 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 | Jul 21, 2023 | Jul 19, 2023 | Yes |
| 00 | Mar 15, 2022 | Feb 17, 2022 | — |
| 00 | Jan 6, 2022 | Dec 30, 2021 | — |
| 00 | Nov 15, 2021 | Oct 8, 2021 | — |
| 00 | Oct 8, 2021 | Aug 19, 2021 | 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 42-177-34388 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-177-34388 → 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.
Bilsky Unit42-177-34389
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Reklaw | 3,967 | -3,662 |
| Wilcox | 4,527 | -4,222 |
| Austin Chalk | 10,985 | -10,680 |
| Eagle Ford | 11,597 | -11,292 |
| Buda | — | |
| Navarro | — | |
| Edwards | — | |
| Carrizo | — |
Bilsky Unit42-177-34387
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Reklaw | 3,967 | -3,662 |
| Wilcox | 4,527 | -4,222 |
| Austin Chalk | 10,995 | -10,690 |
| Eagle Ford | 11,619 | -11,314 |
| Carrizo | — | |
| Navarro | — | |
| Edwards | — | |
| Buda | — |
Nichols Unit42-177-34256
0.5 KM · EOG Resources, Inc. · Section with this well →
| Reklaw | 4,271 | -3,893 |
| Wilcox | 4,502 | -4,124 |
| Carrizo | 4,657 | -4,279 |
| Navarro | 9,513 | -9,135 |
| Anacacho | 10,847 | -10,469 |
| Austin Chalk | 11,192 | -10,814 |
| Eagle Ford | 11,732 | -11,354 |
| Buda | — |
9 TOPS · FIRST 8
Antarctic A42-177-34257
0.5 KM · EOG Resources, Inc. · Section with this well →
| Reklaw | 4,272 | -3,895 |
| Wilcox | 4,503 | -4,126 |
| Carrizo | 4,658 | -4,281 |
| Navarro | 9,526 | -9,149 |
| Anacacho | 10,904 | -10,527 |
| Austin Chalk | 11,214 | -10,837 |
| Eagle Ford | 11,764 | -11,387 |
| Edwards | — |
9 TOPS · FIRST 8
Nichols Unit42-177-34255
0.5 KM · EOG Resources, Inc. · Section with this well →
| Reklaw | 4,188 | -3,811 |
| Wilcox | 4,525 | -4,148 |
| Carrizo | 4,677 | -4,300 |
| Navarro | 9,540 | -9,163 |
| Anacacho | 10,860 | -10,483 |
| Austin Chalk | 11,218 | -10,841 |
| Eagle Ford | 11,752 | -11,375 |
| Buda | — |
9 TOPS · FIRST 8
Bilsky-Bilsky-Chumchal SA42-177-34503
0.7 KM · Marathon Oil EF LLC · Section with this well →
| Reklaw | 3,697 | -3,358 |
| Carrizo | 4,594 | -4,255 |
| Wilcox | 5,685 | -5,346 |
| Austin Chalk | 11,063 | -10,724 |
| Eagle Ford | 11,677 | -11,338 |
| Edwards | — | |
| Buda | — | |
| Navarro | — |
Bilsky-Chumchal SA142-177-34500
0.7 KM · Marathon Oil EF LLC · Section with this well →
| Cook Mountain | 2,459 | -2,119 |
| Reklaw | 3,687 | -3,347 |
| Carrizo | 4,582 | -4,242 |
| Wilcox | 5,654 | -5,314 |
| Olmos | 9,939 | -9,599 |
| Austin Chalk | 11,068 | -10,728 |
| Eagle Ford | 11,682 | -11,342 |
| Navarro | — |
10 TOPS · FIRST 8
Bilsky-Chumchal SA242-177-34501
0.7 KM · Marathon Oil EF LLC · Section with this well →
| Cook Mountain | 2,464 | -2,123 |
| Queen City | 3,509 | -3,168 |
| Reklaw | 3,711 | -3,370 |
| Carrizo | 4,566 | -4,225 |
| Wilcox | 5,665 | -5,324 |
| Midway | 8,787 | -8,446 |
| Olmos | 9,939 | -9,598 |
| Austin Chalk | 11,064 | -10,723 |
12 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/17734388, documented in the API reference.