WELL · 42-255-35296 · DISTRICT 2
Matterhorn Unit #104H
Karnes County · Sugarkane (Austin Chalk) field · Producing · Horizontal
Matterhorn Unit #104H (API 42-255-35296) is a horizontal well in Karnes County operated by Eog Resources Inc., completed April 16, 2017 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued January 30, 2017, permitted to 11,500 ft.
Completion filings report 10 formation tops, including Cook Mountain, Sparta, Weches, Queen City.
Its lease has reported 3.32M barrels of oil and 13.6M mcf of gas since October 2016, last reporting in July 2026. The lease carries 7 wells, so these are lease totals, not this well alone.
Operator of record
- Based in
- Midland, TX
- P-5 status
- Active (A)
- P-5 last filed
- Oct 2, 2025
- Permits on file
- 16,348
- Phone
- (713) 651-7000
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | EOG Resources Inc. |
| Production reports | EOG Resources, Inc.through Apr 2026 |
| Latest permit | EOG Resources, Inc.Jan 30, 2017 |
- 11,500
- total depth, ft
- 1
- permits on file
- Jan 30, 2017
- last permit issued
- Apr 16, 2017
- completed
- 3.32M
- cumulative oil, bbl
- 13.6M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Oct 2016 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Apr 16, 2017
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
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 7 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Matterhorn Unit O-2-11308 | Sugarkane (Austin Chalk) | EOG Resources, Inc. | 7 | 3.32M | 13.6M | Oct 2016 – Jul 2026 |
Gas, mcf lease total
Last 12 months 568,715 · prior 12 591,643(-4%)
Oil, barrels lease total
Last 12 months 66,716 · prior 12 74,966(-11%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1EOG Resources, Inc.Oct 2016 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 822367-99 | Drill | EOG Resources, Inc. | Jan 23, 2017 | Jan 30, 2017 | Feb 11, 2017 | 11,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-2-11308 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 405 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Cook Mountain | 2,157 | -1,752 |
| Sparta | 2,739 | -2,334 |
| Weches | 2,812 | -2,407 |
| Queen City | 3,010 | -2,605 |
| Reklaw | 3,753 | -3,348 |
| Olmos | 9,514 | -9,109 |
| Anacacho | 10,461 | -10,056 |
| Carrizo | — | — |
| FrioFRIO - DISPOSAL | — | — |
| YeguaYEGUA - DISPOSAL | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 10,990 | 15,048 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 2,564 | 12.25 | 700 S |
| 5.5 | 15,097 | 8.5 | 2,600 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 8, 2017 | May 23, 2017 | 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 42-255-35296 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-255-35296 → 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.
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/25535296, documented in the API reference.