WELL · 42-283-31327 · DISTRICT 1
EL Cid -A- #4
LA Salle County · Pearsall (Austin Chalk) field · Horizontal
El Cid -A- #4 (API 42-283-31327) is a horizontal well in La Salle County operated by Bush Mark A. Oil And Gas Inc., completed July 25, 1990.
The RRC has issued one drilling permit (amended once), issued June 1, 1990, permitted to 8,250 ft.
It was permitted by Sanchez-O'Brien Oil & Gas Corp. and has since transferred to Bush Mark A. Oil And Gas Inc. on the wellbore schedule.
Completion filings report 5 formation tops, including Wilcox, Escondido, Olmos, Anacacho.
Its 2 leases have reported 69.6K barrels of oil and 16.7K mcf of gas since January 1993, last reporting in July 2026. The leases carry 8 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Sanchez-O'Brien Oil & Gas Corp.; the EWA schedule now lists a different operator.
Houston, TX · P-5 Y, filed Oct 4, 2025 · 5 permits on file · (713) 739-7695
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Bush Mark A. Oil and Gas Inc. |
| Production reports | Bush, Mark A. Oil and Gas Inc.through Nov 2021 |
| Latest permit | Sanchez-O'Brien Oil & Gas Corp.Jun 1, 1990 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,250
- total depth, ft
- 2
- permits on file
- Jun 1, 1990
- last permit issued
- Jul 25, 1990
- completed
- 69.6K
- cumulative oil, bbl
- 16.7K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jul 25, 1990
- 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 8 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| EL Cid -A- O-1-5394 | Pearsall (Austin Chalk) | Bush, Mark A. Oil and Gas Inc. | 5 | 56.7K | 16.7K | Jan 1993 – Jul 2026 |
| EL Cid -C- O-1-13804 | Pearsall (Austin Chalk) | Bush, Mark A. Oil and Gas Inc. | 3 | 12.9K | 0 | Nov 1993 – Jul 2026 |
No volumes reported on these leases in the last three years.
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Sanchez-O'Brien Oil & Gas Corp.Jan 1993 → Oct 1994
- 2First Rock, Inc.Nov 1994 → Sep 2005
- 3Thompson, Harry F., JrFeb 1997 → Dec 1997
- 4South Oil, Inc.Apr 2011 → Sep 2017
- 5Bush, Mark A. Oil and Gas Inc.Oct 2017 → Nov 2021
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 374037-98 | Drill | Sanchez-O'Brien Oil & Gas Corp. | Nov 30, 1990 | Jun 1, 1990 | — | 7,000 |
| 374037-99 | Drill | Sanchez-O'Brien Oil & Gas Corp. | Jun 1, 1990 | Jun 1, 1990 | Jun 3, 1990 | 8,250 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-5394 | — | — | — | — |
| — | — O-1-13804 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 557 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Wilcox | 2,030 | -1,473 |
| Escondido | 3,880 | -3,323 |
| Olmos | 5,074 | -4,517 |
| Anacacho | 6,465 | -5,908 |
| Austin Chalk | 6,495 | -5,938 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,495 | 11,120 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 840 | 12.25 | 278 S |
| 7 | 6,495 | 8.75 | 534 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 | Nov 30, 1993 | Aug 2, 1990 | Yes |
| 00 | Nov 6, 1990 | Aug 2, 1990 | Yes |
| 00 | Oct 30, 1990 | — | — |
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 42-283-31327 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-283-31327 → 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/28331327, documented in the API reference.