TEXAS · WELLS · REAGAN COUNTY · GRIERSON A LEASE · API 42-383-34420 · DISTRICT 6E
Grierson A #1
Reagan County · Grierson Spring (Strawn) field · Producing · Vertical
Grierson A #1 (API 42-383-34420) is a well in Reagan County operated by Apache Corporation, completed July 20, 1995 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued June 13, 1995, permitted to 9,101 ft.
It was permitted by Enron Oil & Gas Company and has since transferred to Apache Corporation on the wellbore schedule.
Completion filings report 6 formation tops, including Yates, Grayburg, Spraberry, Dean.
Its lease has reported 29.1K barrels of oil and 703K mcf of gas since July 1995, last reporting volume in April 2026.
Operator of record
Permitted by Enron Oil & Gas Company; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active (A)
- P-5 last filed
- Dec 3, 2025
- Permits on file
- 9,758
- Phone
- (713) 954-5500
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Apache Corporation |
| Production reports | Apache Corporationthrough Apr 2026 |
| Latest permit | Enron Oil & Gas CompanyJun 13, 1995 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,101
- total depth, ft
- 2
- permits on file
- Jun 13, 1995
- last permit issued
- Jul 20, 1995
- completed
- 29.1K
- cumulative oil, bbl
- 703K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jul 1995 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jul 20, 1995
- 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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Grierson A G-9-155427 | Grierson Spring (Strawn) | Apache Corporation | 1 | 29.1K | 703K | Jul 1995 – Apr 2026 |
Gas, mcf lease total
Last 12 months 3,880 · prior 12 3,504(+11%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Enron Oil & Gas CompanyJul 1995 → Sep 1999
- 2EOG Resources, Inc.Oct 1999 → Jan 2003
- 3Marathon Oil CompanyFeb 2003 → May 2009
- 4Apache CorporationJun 2009 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 436820-98 | Drill | Enron Oil & Gas Company | Jul 26, 1995 | Jun 13, 1995 | — | 9,101 |
| 436820-99 | Drill | Enron Oil & Gas Company | Jun 13, 1995 | Jun 13, 1995 | Jun 25, 1995 | 9,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jul 20, 1995 | Grierson A G-9-155427 | Grierson Spring (Strawn) | Apache Corporation | Producing | 9,101 |
Formation tops
As filed on W-2/G-1. Subsea from 2,896 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,784 | 8,874 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 11.75 | 815 | 14.75 | 800 S |
| 8.625 | 3,078 | 11 | 750 S |
| 5.5 | 9,101 | 7.875 | 200 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 | Nov 15, 1995 | Aug 16, 1995 | Yes |
| 00 | Oct 3, 1995 | — | — |
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 42-383-34420 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-383-34420 → scanned completion filings
Log images filed since 2004 open from the RRC's log search for this well; none are loaded here for it. The University Lands library has no per-well link: then paste it into its 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/38334420, documented in the API reference.