WELL · 42-255-36650 · DISTRICT 2
Swize McFarland Unit #4H
Karnes County · Eagleville (Eagle Ford-2) field · Producing · Horizontal
Swize Mcfarland Unit #4H (API 42-255-36650) is a horizontal well in Karnes County operated by Marathon Oil EF LLC, completed April 1, 2020 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued October 25, 2019, permitted to 18,000 ft.
Completion filings report 10 formation tops, including Yegua, Queen City, Reklaw, Carrizo.
Its lease has reported 1.63M barrels of oil and 2.42M mcf of gas since December 2012, last reporting in July 2026. The lease carries 4 wells, so these are lease totals, not this well alone.
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 LLCOct 25, 2019 |
- 18,000
- total depth, ft
- 1
- permits on file
- Oct 25, 2019
- last permit issued
- Apr 1, 2020
- completed
- 1.63M
- cumulative oil, bbl
- 2.42M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Dec 2012 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Apr 1, 2020
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
Surface location
28.904833, -98.008731
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 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 |
|---|---|---|---|---|---|---|
| Swize McFarland Unit O-2-10324 | Eagleville (Eagle Ford-2) | Marathon Oil EF LLC | 4 | 1.63M | 2.42M | Dec 2012 – Jul 2026 |
Oil, barrels lease total
Last 12 months 73,658 · prior 12 81,111(-9%)
Gas, mcf lease total
Last 12 months 122,939 · prior 12 135,907(-10%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Marathon Oil EF LLCDec 2012 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 858244-99 | Drill | Marathon Oil EF LLC | Oct 21, 2019 | Oct 25, 2019 | Jan 21, 2020 | 18,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-2-10324 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 371 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| YeguaYEGUA - DISPOSAL | 1,305 | -934 |
| Queen City | 3,165 | -2,794 |
| Reklaw | 3,475 | -3,104 |
| Carrizo | 4,190 | -3,819 |
| WilcoxWILCOX - DISPOSAL | 5,377 | -5,006 |
| Austin ChalkAUSTIN CHALK - H2S | 10,524 | -10,153 |
| Austin ChalkAUSTIN CHALK - H2S | 10,552 | -10,181 |
| Eagle FordEAGLE FORD - H2S | 10,763 | -10,392 |
| Eagle FordEAGLE FORD - H2S | 10,795 | -10,424 |
| EdwardsEDWARDS - H2S | — | — |
| FrioFRIO - DISPOSAL | — | — |
| SligoSLIGO - H2S | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 11,071 | 16,786 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 5,251 | 12.25 | 1,839 S |
| 5.5 | 16,895 | 8.75 | 2,743 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 | Jun 9, 2020 | Apr 28, 2020 | Yes |
| 00 | Jun 8, 2020 | Apr 10, 2020 | Yes |
| 00 | Mar 25, 2020 | Jan 22, 2020 | 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 42-255-36650 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-255-36650 → 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.
Swize McFarland Unit42-255-36649
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,305 | -934 |
| Queen City | 3,165 | -2,794 |
| Reklaw | 3,475 | -3,104 |
| Carrizo | 4,190 | -3,819 |
| Wilcox | 5,377 | -5,006 |
| Austin Chalk | 10,546 | -10,175 |
| Eagle Ford | 10,783 | -10,412 |
| Sligo | — |
10 TOPS · FIRST 8
Swize McFarland Unit AC42-255-36651
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,305 | -937 |
| Queen City | 3,165 | -2,797 |
| Reklaw | 3,475 | -3,107 |
| Carrizo | 4,190 | -3,822 |
| Wilcox | 5,377 | -5,009 |
| Austin Chalk | 10,529 | -10,161 |
| Eagle Ford | — | |
| Edwards | — |
10 TOPS · FIRST 8
Swize McFarland Unit42-255-36648
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,305 | -933 |
| Queen City | 3,165 | -2,793 |
| Reklaw | 3,475 | -3,103 |
| Carrizo | 4,190 | -3,818 |
| Wilcox | 5,377 | -5,005 |
| Austin Chalk | 10,524 | -10,152 |
| Eagle Ford | 10,763 | -10,391 |
| Frio | — |
10 TOPS · FIRST 8
S.mcfarland-Challenger C SA42-255-36040
0.6 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,294 | -949 |
| Queen City | 3,154 | -2,809 |
| Reklaw | 3,464 | -3,119 |
| Carrizo | 4,179 | -3,834 |
| Wilcox | 5,366 | -5,021 |
| Austin Chalk | 10,465 | -10,120 |
| Eagle Ford | 10,705 | -10,360 |
| Frio | — |
10 TOPS · FIRST 8
F.janysek-M.hons-S.mcfarland SA42-255-36077
0.6 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,294 | -950 |
| Queen City | 3,154 | -2,810 |
| Reklaw | 3,464 | -3,120 |
| Carrizo | 4,179 | -3,835 |
| Wilcox | 5,366 | -5,022 |
| Austin Chalk | 10,504 | -10,160 |
| Eagle Ford | 10,763 | -10,419 |
| Frio | — |
10 TOPS · FIRST 8
Mohr-Hons Unit42-255-36038
0.6 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,294 | -951 |
| Queen City | 3,154 | -2,811 |
| Reklaw | 3,464 | -3,121 |
| Carrizo | 4,179 | -3,836 |
| Wilcox | 5,366 | -5,023 |
| Austin Chalk | 10,495 | -10,152 |
| Eagle Ford | 10,759 | -10,416 |
| Edwards | — |
10 TOPS · FIRST 8
Mohr-Hons Unit42-255-36037
0.6 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,294 | -951 |
| Queen City | 3,154 | -2,811 |
| Reklaw | 3,464 | -3,121 |
| Carrizo | 4,179 | -3,836 |
| Wilcox | 5,366 | -5,023 |
| Austin Chalk | 10,524 | -10,181 |
| Eagle Ford | 10,785 | -10,442 |
| Edwards | — |
10 TOPS · FIRST 8
Challenger Unit C AC42-255-36039
0.6 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,294 | -952 |
| Queen City | 3,154 | -2,812 |
| Reklaw | 3,464 | -3,122 |
| Carrizo | 4,179 | -3,837 |
| Wilcox | 5,366 | -5,024 |
| Austin Chalk | 10,518 | -10,176 |
| Sligo | — | |
| 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/25536650, documented in the API reference.