TEXAS · WELLS · KARNES COUNTY · MAY B UNIT LEASE · API 42-255-35638 · DISTRICT 02
May B Unit #13H
Karnes County · Sugarkane (Eagle Ford) field · Temp Abandoned · Horizontal
May B Unit #13H (API 42-255-35638) is a horizontal well in Karnes County operated by Marathon Oil EF LLC, completed July 3, 2018 and listed as temp abandoned on the RRC schedule, shut in August 1, 2025.
The RRC has issued one drilling permit, issued October 20, 2017, permitted to 12,348 ft.
Completion filings report 10 formation tops, including Yegua, Queen City, Reklaw, Carrizo.
Its lease has reported 272K barrels of oil and 2M mcf of gas since December 2017, last reporting volume in July 2025.
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 Sep 2025 |
| Latest permit | Marathon Oil EF LLCOct 20, 2017 |
- 12,348
- total depth, ft
- 1
- permits on file
- Oct 20, 2017
- last permit issued
- Jul 3, 2018
- completed
- 272K
- cumulative oil, bbl
- 2M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jul 2018 THROUGH Sep 2025
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jul 3, 2018
- Shut in
- Aug 1, 2025
- Plugged
- —
Operator's P-5 on the schedule: Active – Extension (X)
Surface location
28.776625, -97.952450 NAD27, as filed
28.776884, -97.952731 WGS84
Permit surface location from the RRC GIS record, referenced to NAD27 as the RRC files it; the WGS84 pair is the same point through NOAA's NADCON grid, and the map link uses it, in Karnes County.
Wells nearby
Every well with a location on file around this one, in any state, nearest first.
Loading the wells nearby…
Texas locations come from drilling permits, so most older Texas wells have none and are not listed.
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 |
|---|---|---|---|---|---|---|
| May B Unit G-2-285056 | Sugarkane (Eagle Ford) | Marathon Oil EF LLC | 1 | 272K | 2M | Dec 2017 – Sep 2025 |
Gas, mcf lease total
Last 12 months 39 · prior 12 69,802(-100%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Marathon Oil EF LLCJul 2018 → Jul 2025
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 831554-99 | Drill | Marathon Oil EF LLC | Oct 2, 2017 | Oct 20, 2017 | Feb 28, 2018 | 22,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jul 3, 2018 | May B Unit G-2-285056 | Sugarkane (Eagle Ford) | Marathon Oil EF LLC | Temp Abandoned · shut in Aug 1, 2025 | 12,348 |
Formation tops
As filed on W-2/G-1. Subsea from 504 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| YeguaYEGUA - DISPOSAL | 2,169 | -1,665 |
| Queen City | 4,567 | -4,063 |
| Reklaw | 4,964 | -4,460 |
| Carrizo | 5,554 | -5,050 |
| Austin ChalkAUSTIN CHALK - H2S | 12,450 | -11,946 |
| Eagle FordEAGLE FORD - H2S | 12,542 | -12,038 |
| EdwardsEDWARDS - H2S | — | — |
| FrioFRIO - DISPOSAL | — | — |
| SligoSLIGO - H2S | — | — |
| WilcoxWILCOX - DISPOSAL | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 12,732 | 20,857 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 5,938 | 12.25 | 1,738 S |
| 9.625 | 5,984 | 12.25 | 1,738 S |
| 5.5 | 20,966 | 8.75 | 3,856 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. The record date is the RRC's own date on the record, not the day the report was filed: 462,034 of the state's filings carry 1984-01-12. About these reports →
| Suffix | RRC record date | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Nov 29, 2018 | Jul 26, 2018 | Yes |
| 00 | Nov 26, 2018 | Jun 26, 2018 | Yes |
Well logs
1 log loaded from the RRC's log index, 1 of it with a digital LAS file, the latest received Dec 21, 2020. Gamma ray. These are the logs loaded into Petrora from the Railroad Commission's inventories, not necessarily every log run on the well. The RRC holds the files; each opens from its log search for the well. The kind is the RRC's description of the log; the interval is the one filed for it.
Open the RRC's log search for this well ↗| Logas described | Files | Intervalft, as filed | Datereceived | SizeMB |
|---|---|---|---|---|
| Gamma RaySpans Carrizo, Austin Chalk, Eagle Ford | LAS + TIFF | 11,918 to 20,987 | Dec 21, 2020 | 0.53 + 3.12 |
"Spans" is by this well's own filed formation tops: a formation runs from its top to the next deeper top filed, and the deepest runs to the bottom of the log. Depths are measured along the wellbore, so on a horizontal the lateral counts in the formation it was landed in.
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 42-255-35638 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-255-35638 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search for it.
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.
May B Unit42-255-35639
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 2,169 | -1,665 |
| Queen City | 4,567 | -4,063 |
| Reklaw | 4,964 | -4,460 |
| Carrizo | 5,554 | -5,050 |
| Austin Chalk | 12,455 | -11,951 |
| Eagle Ford | 12,548 | -12,044 |
| Wilcox | — | |
| Edwards | — |
10 TOPS · FIRST 8
May B Unit42-255-35640
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 2,169 | -1,664 |
| Queen City | 4,567 | -4,062 |
| Reklaw | 4,964 | -4,459 |
| Carrizo | 5,554 | -5,049 |
| Austin Chalk | 12,299 | -11,794 |
| Eagle Ford | 12,548 | -12,043 |
| Wilcox | — | |
| Edwards | — |
10 TOPS · FIRST 8
May B Unit AC42-255-35641
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 2,169 | -1,664 |
| Queen City | 4,567 | -4,062 |
| Reklaw | 4,964 | -4,459 |
| Carrizo | 5,554 | -5,049 |
| Austin Chalk | 12,451 | -11,946 |
| Edwards | — | |
| Frio | — | |
| Wilcox | — |
10 TOPS · FIRST 8
May B Unit42-255-35625
0.2 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 2,209 | -1,702 |
| Queen City | 4,606 | -4,099 |
| Reklaw | 5,003 | -4,496 |
| Carrizo | 5,594 | -5,087 |
| Wilcox | 6,766 | -6,259 |
| Austin Chalk | 12,462 | -11,955 |
| Eagle Ford | 12,550 | -12,043 |
| Edwards | — |
10 TOPS · FIRST 8
May B Unit42-255-35626
0.2 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 2,209 | -1,702 |
| Queen City | 4,606 | -4,099 |
| Reklaw | 5,003 | -4,496 |
| Carrizo | 5,594 | -5,087 |
| Wilcox | 6,766 | -6,259 |
| Austin Chalk | 12,466 | -11,959 |
| Eagle Ford | 12,551 | -12,044 |
| Sligo | — |
10 TOPS · FIRST 8
May B Unit42-255-35627
0.2 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 2,209 | -1,703 |
| Queen City | 4,606 | -4,100 |
| Reklaw | 5,003 | -4,497 |
| Carrizo | 5,594 | -5,088 |
| Wilcox | 6,766 | -6,260 |
| Austin Chalk | 12,470 | -11,964 |
| Eagle Ford | 12,555 | -12,049 |
| Frio | — |
10 TOPS · FIRST 8
May B Unit42-255-35628
0.2 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 2,209 | -1,703 |
| Queen City | 4,606 | -4,100 |
| Reklaw | 5,003 | -4,497 |
| Carrizo | 5,594 | -5,088 |
| Wilcox | 6,766 | -6,260 |
| Austin Chalk | 12,476 | -11,970 |
| Eagle Ford | 12,563 | -12,057 |
| Frio | — |
10 TOPS · FIRST 8
Hollman Unit42-255-35838
1.8 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,917 | -1,462 |
| Queen City | 4,314 | -3,859 |
| Reklaw | 4,711 | -4,256 |
| Carrizo | 5,302 | -4,847 |
| Wilcox | 6,474 | -6,019 |
| Austin Chalk | 12,217 | -11,762 |
| Eagle Ford | 12,338 | -11,883 |
| 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/25535638, documented in the API reference.