TEXAS · WELLS · COCHRAN COUNTY · MASTEN, F. O. LEASE · API 42-079-31073 · DISTRICT 7B
Masten F. O. #17
Cochran County · Levelland field · Shut In · Vertical
Masten F. O. #17 (API 42-079-31073) is a well in Cochran County operated by Ctoc Energy LLC, completed June 15, 1979 and listed as shut in on the RRC schedule, shut in November 1, 2024.
The RRC has issued one drilling permit, issued May 15, 1979, permitted to 5,200 ft.
It was permitted by Arco Oil & Gas CO. and has since transferred to Ctoc Energy LLC on the wellbore schedule.
Its lease has reported 334K barrels of oil and 178K mcf of gas since the record begins in January 1993, last reporting volume in February 2025. The lease carries 23 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Arco Oil & Gas Co.; the EWA schedule now lists a different operator.
- Based in
- Fort Worth, TX
- P-5 status
- Active (A)
- P-5 last filed
- Apr 24, 2026
- Phone
- (682) 549-7537
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Ctoc Energy LLC |
| Production reports | Ctoc Energy, LLCthrough Feb 2025 |
| Latest permit | Arco Oil & Gas Co.May 15, 1979 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 5,200
- total depth, ft
- 1
- permits on file
- May 15, 1979
- last permit issued
- Jun 15, 1979
- completed
- 334K
- cumulative oil, bbl
- 178K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · ON RECORD FROM JAN 1993, THE RECORD'S FIRST MONTH, THROUGH FEB 2025
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jun 15, 1979
- Shut in
- Nov 1, 2024
- 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.
Wells nearby
Every well with a location on file around this well, in any state, nearest first.
Texas locations come from drilling permits, so most older Texas wells have none and are not listed.
Lease production
PDQ LEASE REPORTS · REPORTED THROUGH AUG 2026
Texas reports oil by lease, not by well. These are the lease this well is completed on; they carry 23 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Masten, F. O. O-11-61980 | Levelland | Ctoc Energy, LLC | 23 | 334K | 178K | by Jan 1993 – Feb 2025 |
Oil, barrels lease total
Last 12 months 0 · prior 12 231(-100%)
Wells named Masten F. O.
Ctoc Energy LLC's other wells filed under this lease name in Cochran County, newest permit first. The RRC gives a gas well its own lease number, so the name is what joins the wells of a unit.
Loading the lease's wellsChain of custody
Every operator that reported production on this well's lease, in order.
- 1Anadarko Petroleum CorporationJan 1993 → Nov 2004
- 2Merit Energy CompanyDec 2004 → Dec 2013
- 3Cross Timbers Energy, LLCJan 2014 → Feb 2025
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 48565-99 | Drill | Arco Oil & Gas Co. | May 15, 1979 | May 15, 1979 | Jun 4, 1979 | 5,250 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jun 15, 1979 | Masten F. O. O-11-61980 | Levelland | Ctoc Energy LLC | Shut In · shut in Nov 1, 2024 | 5,200 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 4,977 | 5,062 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 480 | 12.25 | 350 S |
| 2.375 | 5,172 | — | — |
| 5.5 | 5,200 | 7.875 | 1,750 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 | Jan 12, 1984 | Jul 2, 1979 | — |
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 42-079-31073 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-079-31073 → scanned completion filings
Log images filed since 2004 open from the RRC's log search for this well; none are loaded here for it.
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/07931073, documented in the API reference.