TEXAS · WELLS · ATASCOSA COUNTY · GUAJILLO EAST LEASE · API 42-013-34979 · DISTRICT 01
Guajillo East #2H
Atascosa County · Eagleville (Eagle Ford-1) field · Producing · Horizontal
Guajillo East #2H (API 42-013-34979) is a horizontal well in Atascosa County operated by Marathon Oil EF LLC, completed December 4, 2019 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued May 5, 2014, permitted to 11,207 ft.
Completion filings report 12 formation tops, including Queen City, Carrizo, Reklaw, Bartosh.
Its lease has reported 10.9M barrels of oil and 14.6M mcf of gas since March 2014, last reporting volume in April 2026. The lease carries 61 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 LLCMay 5, 2014 |
- 11,207
- total depth, ft
- 2
- permits on file
- May 5, 2014
- last permit issued
- Dec 4, 2019
- completed
- 10.9M
- cumulative oil, bbl
- 14.6M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jun 2014 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Dec 4, 2019
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active – Extension (X)
Surface location
No coordinates on the permit record yet. The RRC's GIS record usually lands within days of issuance; historical master-file permits never carry one.
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 61 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Guajillo East O-1-17741 | Eagleville (Eagle Ford-1) | Marathon Oil EF LLC | 61 | 10.9M | 14.6M | Mar 2014 – Apr 2026 |
Oil, barrels lease total
Last 12 months 192,543 · prior 12 317,175(-39%)
Gas, mcf lease total
Last 12 months 274,310 · prior 12 537,477(-49%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Marathon Oil EF LLCJun 2014 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 783410-98 | Drill | Marathon Oil EF LLC | May 16, 2014 | May 5, 2014 | Dec 6, 2014 | 17,500 |
| 783410-99 | Drill | Marathon Oil EF LLC | Mar 28, 2014 | May 5, 2014 | Aug 6, 2014 | 17,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Dec 4, 2019 | Guajillo East O-1-17741 | Eagleville (Eagle Ford-1) | Marathon Oil EF LLC | Producing | 11,207 |
Formation tops
As filed on W-2/G-1. Subsea from 252 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Queen City | 830 | -578 |
| Carrizo | 1,580 | -1,328 |
| Reklaw | 1,580 | -1,328 |
| Bartosh | 1,820 | -1,568 |
| Olmos | 1,820 | -1,568 |
| OlmosOLMOS - DISPOSAL | 1,820 | -1,568 |
| Carrizo | 1,900 | -1,648 |
| Reklaw | 1,900 | -1,648 |
| Escondido | 2,600 | -2,348 |
| EscondidoESCONDIDO - H2S, DISPOSAL | 2,600 | -2,348 |
| WilcoxWILCOX - DISPOSAL | 2,600 | -2,348 |
| Carrizo | 2,690 | -2,438 |
| Bartosh | 3,150 | -2,898 |
| NavarroNAVARRO - H2S | 3,150 | -2,898 |
| EscondidoESCONDIDO - H2S, DISPOSAL | 3,600 | -3,348 |
| Navarro | 3,600 | -3,348 |
| NavarroNAVARRO - H2S | 3,600 | -3,348 |
| OlmosOLMOS - DISPOSAL | 4,660 | -4,408 |
| Wilcox | 4,660 | -4,408 |
| WilcoxWILCOX - DISPOSAL | 4,660 | -4,408 |
| AnacachoANACACHO - H2S | 10,614 | -10,362 |
| Austin ChalkAUSTIN CHALK - H2S, DISPOSAL | 10,821 | -10,569 |
| Buda | — | — |
| Edwards | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 11,312 | 16,091 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 5,350 | 12.25 | 1,960 S |
| 5.5 | 16,180 | 8.5 | 1,885 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 6, 2024 | Oct 17, 2024 | — |
| 00 | May 6, 2020 | Jan 22, 2020 | — |
| 00 | Dec 8, 2016 | Nov 15, 2016 | Yes |
| 00 | Jul 24, 2015 | Mar 2, 2015 | Yes |
| 00 | May 28, 2015 | Dec 12, 2014 | Yes |
Well logs
2 logs loaded from the RRC's log index, 2 of them with a digital LAS file, the latest received Dec 14, 2017. 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 Navarro, Anacacho, Austin Chalk | LAS + TIFF | 5,350 to 16,180 | Dec 14, 2017 | 1.34 + 8.92 |
| Gamma RaySpans Navarro, Anacacho, Austin Chalk | LAS + TIFF | 10,000 to 16,180 | Aug 14, 2017 | 1.34 + 6.71 |
"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 42-013-34979 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-013-34979 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search for it.
Beyond the permit record
RRC UIC permits · H-10 reported volumes
Injection
- 0
- bbl, last 12 reported months
- 0
- bbl, all reported
- —
- reported through
| UIC | Kind | Status | Permitted bbl/d | Max psi | Zone ft |
|---|---|---|---|---|---|
| 000124737 | H-1 Injection | Canceled Sep 9, 2025 | 0 | 0 | 10,501–11,207 |
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/01334979, documented in the API reference.