WELL · 42-255-36286 · DISTRICT 2
San Christoval Ranch Unit B #8H
Karnes County · Sugarkane (Eagle Ford) field · Producing · Horizontal
San Christoval Ranch Unit B #8H (API 42-255-36286) is a horizontal well in Karnes County operated by Marathon Oil EF LLC, completed August 20, 2020 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued February 7, 2019, permitted to 11,734 ft.
Completion filings report 10 formation tops, including Yegua, Queen City, Wilcox, Austin Chalk.
Its 2 leases have reported 681K barrels of oil and 4.25M mcf of gas since September 2016, last reporting in July 2026. The leases carry 10 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 LLCFeb 7, 2019 |
- 11,734
- total depth, ft
- 1
- permits on file
- Feb 7, 2019
- last permit issued
- Aug 20, 2020
- completed
- 681K
- cumulative oil, bbl
- 4.25M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Sep 2016 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Aug 20, 2020
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active – Extension (X)
Surface location
28.768653, -98.070278
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 10 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| San Christoval Ranch Unit B G-2-294360 | Sugarkane (Eagle Ford) | Marathon Oil EF LLC | 1 | 0 | 1.37M | Feb 2020 – Jul 2026 |
| San Christoval Ranch Unit B O-2-11275 | Sugarkane (Eagle Ford) | Marathon Oil EF LLC | 9 | 681K | 2.87M | Sep 2016 – Jul 2026 |
Gas, mcf lease total
Last 12 months 70,566 · prior 12 76,006(-7%)
Oil, barrels lease total
Last 12 months 11,650 · prior 12 11,262(+3%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Marathon Oil EF LLCSep 2016 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 848277-99 | Drill | Marathon Oil EF LLC | Jan 2, 2019 | Feb 7, 2019 | Feb 7, 2020 | 22,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Aug 20, 2020 | San Christoval Ranch Unit B G-2-294360 | Sugarkane (Eagle Ford) | Marathon Oil EF LLC | Producing | 11,734 |
| Aug 20, 2020 | San Christoval Ranch Unit B O-2-11275 | Sugarkane (Eagle Ford) | Marathon Oil EF LLC | Not on Schedule | — |
Formation tops
As filed on W-2/G-1. Subsea from 409 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| YeguaYEGUA - DISPOSAL | 1,305 | -896 |
| Queen City | 3,544 | -3,135 |
| WilcoxWILCOX - DISPOSAL | 5,868 | -5,459 |
| Austin ChalkAUSTIN CHALK - H2S | 11,285 | -10,876 |
| Eagle FordEAGLE FORD - H2S | 11,443 | -11,034 |
| Carrizo | — | — |
| EdwardsEDWARDS - H2S | — | — |
| FrioFRIO - DISPOSAL | — | — |
| Reklaw | — | — |
| SligoSLIGO - H2S | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 11,719 | 19,100 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 5,734 | 12.25 | 1,423 S |
| 5.5 | 19,210 | 8.75 | 3,160 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 6, 2023 | May 8, 2023 | — |
| 00 | Apr 28, 2023 | Apr 10, 2023 | Yes |
| 00 | Sep 3, 2020 | Aug 21, 2020 | Yes |
| 00 | Jun 12, 2020 | May 9, 2020 | Yes |
| 00 | Mar 10, 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 42-255-36286 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-255-36286 → 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.
SCR B-Turnbull H 1H Psa42-255-36287
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,305 | -897 |
| Queen City | 3,544 | -3,136 |
| Wilcox | 5,868 | -5,460 |
| Austin Chalk | 11,275 | -10,867 |
| Eagle Ford | 11,412 | -11,004 |
| Carrizo | — | |
| Sligo | — | |
| Reklaw | — |
10 TOPS · FIRST 8
Turnbull Unit H42-255-36288
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,305 | -898 |
| Queen City | 3,544 | -3,137 |
| Wilcox | 5,868 | -5,461 |
| Austin Chalk | 11,261 | -10,854 |
| Eagle Ford | 11,432 | -11,025 |
| Carrizo | — | |
| Reklaw | — | |
| Sligo | — |
10 TOPS · FIRST 8
Turnbull Unit H42-255-36289
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Wilcox | 588 | -180 |
| Yegua | 1,305 | -897 |
| Queen City | 3,544 | -3,136 |
| Austin Chalk | 11,280 | -10,872 |
| Eagle Ford | 11,427 | -11,019 |
| Carrizo | — | |
| Sligo | — | |
| Reklaw | — |
10 TOPS · FIRST 8
Turnbull Unit H42-255-35764
0.3 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,254 | -843 |
| Queen City | 3,493 | -3,082 |
| Wilcox | 5,817 | -5,406 |
| Austin Chalk | 11,275 | -10,864 |
| Eagle Ford | 11,415 | -11,004 |
| Frio | — | |
| Carrizo | — | |
| Edwards | — |
10 TOPS · FIRST 8
Turnbull Unit H42-255-35765
0.4 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,254 | -844 |
| Queen City | 3,493 | -3,083 |
| Wilcox | 5,817 | -5,407 |
| Austin Chalk | 11,286 | -10,876 |
| Eagle Ford | 11,418 | -11,008 |
| Reklaw | — | |
| Sligo | — | |
| Carrizo | — |
10 TOPS · FIRST 8
Turnbull Unit H42-255-35766
0.4 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,254 | -845 |
| Queen City | 3,493 | -3,084 |
| Wilcox | 5,817 | -5,408 |
| Austin Chalk | 11,274 | -10,865 |
| Eagle Ford | 11,416 | -11,007 |
| Carrizo | — | |
| Sligo | — | |
| Reklaw | — |
10 TOPS · FIRST 8
Turnbull Unit H42-255-35767
0.4 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,254 | -845 |
| Queen City | 3,493 | -3,084 |
| Wilcox | 5,817 | -5,408 |
| Austin Chalk | 11,267 | -10,858 |
| Eagle Ford | 11,409 | -11,000 |
| Reklaw | — | |
| Frio | — | |
| Edwards | — |
10 TOPS · FIRST 8
Julie Beck42-255-36922
1.2 KM · Teal Operating, LLC · Section with this well →
| Frio | 1,000 | -612 |
| Yegua | 1,300 | -912 |
| Queen City | 5,000 | -4,612 |
| Reklaw | 5,200 | -4,812 |
| Carrizo | 5,300 | -4,912 |
| Wilcox | 7,000 | -6,612 |
| Austin Chalk | 10,900 | -10,512 |
| Eagle Ford | 11,217 | -10,829 |
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/25536286, documented in the API reference.