TEXAS · WELLS · COCHRAN COUNTY · MASTEN, F. O. "20" LEASE · API 42-079-30847 · DISTRICT 7B
Masten F. O. 20 #4
Cochran County · Levelland field · Shut In · Vertical
Masten F. O. 20 #4 (API 42-079-30847) is a well in Cochran County operated by Ctoc Energy LLC, completed August 1, 1999 and listed as shut in on the RRC schedule, shut in February 1, 2017.
The RRC has issued one drilling permit, issued February 2, 1978, permitted to 5,150 ft.
It was permitted by Atlantic Richfield CO. and has since transferred to Ctoc Energy LLC on the wellbore schedule.
Its lease has reported 37.4K barrels of oil and 40.7K mcf of gas since January 1993, last reporting in July 2026. The lease carries 5 wells, so these are lease totals, not this well alone.
It holds an active disposal or injection permit.
Operator of record
Permitted by Atlantic Richfield 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
- (817) 334-7804
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Ctoc Energy LLC |
| Production reports | Cross Timbers Energy, LLCthrough Apr 2026 |
| Latest permit | Atlantic Richfield Co.Feb 2, 1978 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 5,150
- total depth, ft
- 1
- permits on file
- Feb 2, 1978
- last permit issued
- Aug 1, 1999
- completed
- 37.4K
- cumulative oil, bbl
- 40.7K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Aug 1, 1999
- Shut in
- Feb 1, 2017
- 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 5 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Masten, F. O. "20" O-11-61993 | Levelland | Cross Timbers Energy, LLC | 5 | 37.4K | 40.7K | Jan 1993 – Jul 2026 |
Oil, barrels lease total
Last 12 months 1,234 · prior 12 1,102(+12%)
Chain 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 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 17522-99 | Drill | Atlantic Richfield Co. | Feb 2, 1978 | Feb 2, 1978 | Mar 30, 1978 | 5,200 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Aug 1, 1999 | Masten F. O. 20 O-11-61993 | Levelland | Ctoc Energy LLC | Shut In · shut in Feb 1, 2017 | 5,150 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 5,107 | 5,122 | Perforated |
| — | 5,122 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 468 | 12.25 | 350 S |
| 5.5 | 5,150 | 7.875 | 1,600 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 | Jan 4, 2022 | Nov 29, 2021 | — |
| 00 | May 31, 1994 | Apr 21, 1994 | — |
| 00 | Jan 12, 1984 | Jun 1, 1978 | — |
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 42-079-30847 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-079-30847 → 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.
Beyond the permit record
RRC UIC permits · H-10 reported volumes
Injection
- 0
- bbl, last 12 reported months
- 2.43M
- bbl, all reported
- Feb 2026
- reported through
| UIC | Kind | Status | Permitted bbl/d | Max psi | Zone ft |
|---|---|---|---|---|---|
| 000073702 | H-1 Injection | Active | 300 | 2,495 | 4,993–5,122 |
MONTHLY INJECTED, BBL · H-10 · LAST 24 REPORTED MONTHS
Last 12 months 0 · prior 12 0
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/07930847, documented in the API reference.