TEXAS · WELLS · MCMULLEN COUNTY · MARTIN MASON UNIT P LEASE · API 42-311-35388 · DISTRICT 01
Martin Mason Unit P #1H
McMullen County · Eagleville (Eagle Ford-1) field · Shut In · Horizontal
Martin Mason Unit P #1H (API 42-311-35388) is a horizontal well in Mcmullen County operated by Ineos USA Oil & Gas LLC, completed February 17, 2014 and listed as shut in on the RRC schedule, shut in June 1, 2022.
The RRC has issued one drilling permit (amended once), issued April 17, 2013, permitted to 9,303 ft.
It was permitted by Chesapeake Operating, Inc. and has since transferred to Ineos USA Oil & Gas LLC on the wellbore schedule.
Completion filings report 3 formation tops, including Anacacho, Austin Chalk, Eagle Ford.
Its lease has reported 272K barrels of oil and 107K mcf of gas since February 2014, last reporting in July 2026. The lease carries 2 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Chesapeake Operating, Inc.; the EWA schedule now lists a different operator.
- Based in
- Denver, CO
- P-5 status
- Active – Extension (X)
- P-5 last filed
- May 26, 2026
- Permits on file
- 98
- Phone
- (720) 764-3473
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Ineos USA Oil & Gas LLC |
| Production reports | Ineos USA Oil & Gas LLCthrough Apr 2026 |
| Latest permit | Chesapeake Operating, Inc.Apr 17, 2013 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,303
- total depth, ft
- 2
- permits on file
- Apr 17, 2013
- last permit issued
- Feb 17, 2014
- completed
- 272K
- cumulative oil, bbl
- 107K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Feb 2014 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Feb 17, 2014
- Shut in
- Jun 1, 2022
- 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 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Martin Mason Unit P O-1-17488 | Eagleville (Eagle Ford-1) | Ineos USA Oil & Gas LLC | 2 | 272K | 107K | Feb 2014 – Jul 2026 |
Oil, barrels lease total
Last 12 months 4,102 · prior 12 4,571(-10%)
Gas, mcf lease total
Last 12 months 479 · prior 12 767(-38%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Chesapeake Operating, Inc.Feb 2014 → 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 |
|---|---|---|---|---|---|---|
| 760637-98 | Drill | Chesapeake Operating, Inc. | Jul 3, 2013 | Apr 17, 2013 | Sep 30, 2013 | 12,000 |
| 760637-99 | Drill | Chesapeake Operating, Inc. | Apr 12, 2013 | Apr 17, 2013 | Sep 30, 2013 | 12,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Feb 17, 2014 | Martin Mason Unit P O-1-17488 | Eagleville (Eagle Ford-1) | Ineos USA Oil & Gas LLC | Shut In · shut in Jun 1, 2022 | 9,303 |
Formation tops
As filed on W-2/G-1. Subsea from 380 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Anacacho | 8,465 | -8,085 |
| Austin Chalk | 8,835 | -8,455 |
| Eagle FordEAGLEFORD | 9,096 | -8,716 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,391 | 14,756 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 3,885 | 12.25 | 1,275 S |
| 5.5 | 14,936 | 7.875 | 1,724 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 6, 2014 | Mar 6, 2014 | 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 42-311-35388 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-311-35388 → 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/31135388, documented in the API reference.