WELL · 42-317-31986 · DISTRICT 8
Grantham #A-1
Martin County · Ackerly (Dean Sand) field · Producing · Vertical
Grantham #A-1 (API 42-317-31986) is a well in Martin County operated by Diamondback E&P LLC, completed August 24, 1978 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued March 6, 1978, permitted to 8,800 ft.
It was permitted by Maguire Oil Company and has since transferred to Diamondback E&P LLC on the wellbore schedule.
Its lease has reported 41.4K barrels of oil and 178K mcf of gas since January 1993, last reporting in July 2026. The lease carries 4 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Maguire Oil Company; the EWA schedule now lists a different operator.
- Based in
- Midland, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- May 4, 2026
- Permits on file
- 5,237
- Phone
- (432) 221-7400
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Diamondback E&P LLC |
| Production reports | Diamondback E&P LLCthrough Apr 2026 |
| Latest permit | Maguire Oil CompanyMar 6, 1978 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,800
- total depth, ft
- 1
- permits on file
- Mar 6, 1978
- last permit issued
- Aug 24, 1978
- completed
- 41.4K
- cumulative oil, bbl
- 178K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Aug 24, 1978
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active – Extension (X)
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 4 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Grantham O-11-60133 | Ackerly (Dean Sand) | Diamondback E&P LLC | 4 | 41.4K | 178K | Jan 1993 – Jul 2026 |
Oil, barrels lease total
Last 12 months 198 · prior 12 320(-38%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Maguire Oil CompanyJan 1993 → Sep 2004
- 2Enervest Operating, L.L.C.Nov 2004 → Dec 2005
- 3Energen Resources CorporationJan 2006 → Jan 2019
- 4Diamondback E&P LLCFeb 2019 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 19407-99 | Recompletion | Maguire Oil Company | Mar 6, 1978 | Mar 6, 1978 | Mar 11, 1978 | 8,800 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-11-60133 | — | — | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| — | 8,576 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 347 | 17.5 | 350 S |
| 8.625 | 3,657 | 11 | 300 S |
| 4.5 | 8,706 | 7.875 | 400 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 12, 1984 | Sep 18, 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 42-317-31986 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-317-31986 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward) and the University Lands library. 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/31731986, documented in the API reference.