WELL · 42-311-34220 · DISTRICT 1
Martin-Mason Ranch Unit A #1H
McMullen County · Eagleville (Eagle Ford) field · Horizontal
Martin-Mason Ranch Unit A #1H (API 42-311-34220) is a horizontal well in Mcmullen County operated by Chesapeake Operating Inc., completed July 22, 2010.
The RRC has issued one drilling permit, issued April 21, 2010, permitted to 9,850 ft.
It was permitted by Union Gas Operating Company and has since transferred to Chesapeake Operating Inc. on the wellbore schedule.
Completion filings report 3 formation tops, including Escondido, Austin Chalk, Eagle Ford.
Its 3 leases have reported 327K barrels of oil and 170K mcf of gas since June 2010, last reporting in July 2026. The leases carry 4 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Union Gas Operating Company; the EWA schedule now lists a different operator.
Oklahoma City, OK · P-5 Y, filed Jul 4, 2026 · 13,061 permits on file · (405) 935-7500
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Chesapeake Operating Inc. |
| Production reports | Ineos USA Oil & Gas LLCthrough Apr 2026 |
| Latest permit | Union Gas Operating CompanyApr 21, 2010 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,850
- total depth, ft
- 1
- permits on file
- Apr 21, 2010
- last permit issued
- Jul 22, 2010
- completed
- 327K
- cumulative oil, bbl
- 170K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jun 2010 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jul 22, 2010
- Shut in
- —
- Plugged
- —
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 3 leases 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 |
|---|---|---|---|---|---|---|
| Martin-Mason Ranch Unit A O-1-15510 | Eagleville (Eagle Ford-1) | Ineos USA Oil & Gas LLC | 2 | 292K | 144K | Dec 2010 – Jul 2026 |
| Martin-Mason Ranch Unit "A" O-2-9504 | Eagleville (Eagle Ford) | Chesapeake Operating, Inc. | 1 | 34.3K | 25.9K | Jul 2010 – Feb 2012 |
| Martin-Mason Ranch Unit "A" G-1-258209 | Hawkville (Eagleford Shale) | Chesapeake Operating, Inc. | 1 | 0 | 0 | Jun 2010 – Jul 2010 |
Oil, barrels lease total
Last 12 months 3,520 · prior 12 4,025(-13%)
Gas, mcf lease total
Last 12 months 2,270 · prior 12 1,170(+94%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Chesapeake Operating, Inc.Jul 2010 → Oct 2014
- 2Chesapeake Operating, L.L.C.Nov 2014 → Mar 2023
- 3Ineos USA Oil & Gas LLCApr 2023 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 694600-99 | Drill | Union Gas Operating Company | Apr 16, 2010 | Apr 21, 2010 | Apr 26, 2010 | 9,850 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-1-258209 | — | — | — | — |
| — | — O-1-15510 | — | — | — | — |
| — | — O-2-9504 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 388 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Escondido | 6,407 | -6,019 |
| Austin Chalk | 9,285 | -8,897 |
| Eagle Ford | 9,410 | -9,022 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,743 | 16,495 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 4,434 | 12.25 | 1,440 S |
| 5.5 | 16,604 | 8.75 | 2,416 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 | Jan 11, 2012 | Sep 9, 2010 | — |
| 00 | Mar 18, 2011 | Sep 9, 2010 | — |
| 00 | Mar 9, 2011 | — | — |
| 00 | Dec 14, 2010 | Jul 30, 2010 | Yes |
| 00 | Dec 8, 2010 | — | — |
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 42-311-34220 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-311-34220 → 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/31134220, documented in the API reference.