TEXAS · WELLS · ATASCOSA COUNTY · CALFAS A LEASE · API 42-013-31893 · DISTRICT 01
Calfas A #1
Atascosa County · Somerset field · Producing · Vertical
Calfas A #1 (API 42-013-31893) is a well in Atascosa County operated by Calfas Oil LLC, completed April 15, 1983 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued April 5, 1983, permitted to 1,920 ft.
It was permitted by Far, Inc. and has since transferred to Calfas Oil LLC on the wellbore schedule.
Its lease has reported 26.7K barrels of oil and 14 mcf of gas since January 1993, last reporting volume in April 2026. The lease carries 33 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Far, Inc.; the EWA schedule now lists a different operator.
- Based in
- San Antonio, TX
- P-5 status
- Active (A)
- P-5 last filed
- Mar 12, 2026
- Phone
- (210) 212-6969
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Calfas Oil LLC |
| Production reports | Calfas Oil, LLCthrough Apr 2026 |
| Latest permit | Far, Inc.Apr 5, 1983 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 1,920
- total depth, ft
- 1
- permits on file
- Apr 5, 1983
- last permit issued
- Apr 15, 1983
- completed
- 26.7K
- cumulative oil, bbl
- 14
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Apr 15, 1983
- Shut in
- —
- 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 33 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Calfas A O-1-10790 | Somerset | Calfas Oil, LLC | 33 | 26.7K | 14 | Jan 1993 – Apr 2026 |
Oil, barrels lease total
Last 12 months 265 · prior 12 445(-40%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Far, Inc.Jan 1993 → Jan 1994
- 2Partin, CharlesNov 1994 → Dec 2004
- 3P J PartnershipJan 2005 → Oct 2010
- 4MCB C & J, LLCNov 2010 → Feb 2020
- 5Calfas Oil, LLCMar 2020 → Apr 2026
Permits
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Apr 15, 1983 | Calfas A O-1-10790 | Somerset | Calfas Oil LLC | Producing | 1,920 |
| Apr 15, 1983 | Calfas A O-1-10790 | Somerset | Calfas Oil LLC | Not on Schedule | — |
| Apr 15, 1983 | Fowler I./A. Winans O-1-8850 | Shaw | Far Inc. | Not on Schedule | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 1,838 | 1,850 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 4.5 | 1,890 | 6.75 | 237 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 | Apr 1, 2021 | May 3, 1983 | — |
| 00 | Mar 12, 1986 | May 3, 1983 | — |
| 00 | Jan 25, 1986 | — | — |
| 00 | Jan 12, 1984 | May 3, 1983 | — |
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 42-013-31893 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-013-31893 → 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/01331893, documented in the API reference.