WELL · 42-311-34519 · DISTRICT 1
Martin Mason Ranch Unit A #U 5H
McMullen County · Eagleville (Eagle Ford-1) field · Horizontal
Martin Mason Ranch Unit A #U 5H (API 42-311-34519) is a horizontal well in Mcmullen County operated by Chesapeake Operating Inc., completed June 27, 2011.
The RRC has issued one drilling permit, issued April 1, 2011, permitted to 12,000 ft.
Completion filings report 3 formation tops, including Anacacho, Austin Chalk, Eagle Ford.
Its 2 leases have reported 303K barrels of oil and 149K mcf of gas since December 2010, last reporting in July 2026. The leases carry 3 wells, so these are lease totals, not this well alone.
Operator of record
- Based in
- Oklahoma City, OK
- P-5 status
- Delinquent (D)
- P-5 last filed
- Dec 10, 2024
- Permits on file
- 13,061
- Phone
- (405) 935-3100
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 | Chesapeake Operating, Inc.Apr 1, 2011 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 12,000
- total depth, ft
- 1
- permits on file
- Apr 1, 2011
- last permit issued
- Jun 27, 2011
- completed
- 303K
- cumulative oil, bbl
- 149K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Dec 2010 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jun 27, 2011
- 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 2 leases this well is completed on; they carry 3 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-1-15579 | Eagleville (Eagle Ford-1) | Chesapeake Operating, Inc. | 1 | 10.5K | 4.21K | Jun 2011 – Oct 2012 |
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.Jan 2011 → 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 |
|---|---|---|---|---|---|---|
| 713008-99 | Drill | Chesapeake Operating, Inc. | Mar 28, 2011 | Apr 1, 2011 | May 19, 2011 | 12,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-15510 | — | — | — | — |
| — | — O-1-15579 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 388 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Anacacho | 9,156 | -8,768 |
| Austin Chalk | 9,498 | -9,110 |
| Eagle Ford | 9,654 | -9,266 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 10,513 | 17,802 | Perforated |
| 16,975 | 17,802 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 4,350 | 12.25 | 1,242 S |
| 5.5 | 17,920 | 8.75 | 3,025 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 | May 9, 2012 | Mar 19, 2012 | — |
| 00 | Apr 4, 2012 | Nov 14, 2011 | Yes |
| 00 | Feb 29, 2012 | Nov 14, 2011 | 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 42-311-34519 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-311-34519 → 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/31134519, documented in the API reference.