WELL · 42-041-31786 · DISTRICT 3
Mahaffey #1
Brazos County · Giddings (Austin Chalk Gas) field · Horizontal · Sidetrack
Mahaffey #1 (API 42-041-31786) is a plugged horizontal well in Brazos County, plugged July 11, 2019, last operated by Snyder Oil Corporation.
The RRC has issued 2 drilling permits between 1993 and 1994, permitted to 14,650 ft.
Completion filings report 2 formation tops, including Pecan Gap, Austin Chalk.
Its 2 leases have reported 31K barrels of oil and 555K mcf of gas since January 1994, last reporting in March 2020. The leases carry 3 wells, so these are lease totals, not this well alone.
Operator of record
Houston, TX · P-5 Y, filed Apr 5, 1999 · 101 permits on file
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Snyder Oil Corporation |
| Production reports | Endeavor Energy Resources L.P.through Sep 2015 |
| Latest permit | Snyder Oil CorporationDec 13, 1994 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 14,650
- total depth, ft
- 2
- permits on file
- Dec 13, 1994
- last permit issued
- Jan 4, 1994
- completed
- 31K
- cumulative oil, bbl
- 555K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1994 THROUGH Mar 2020
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jan 4, 1994
- Shut in
- —
- Plugged
- Jul 11, 2019
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 3 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Mahaffey O-3-22906 | Giddings (Austin Chalk-3) | Endeavor Energy Resources L.P. | 2 | 31K | 347K | Jan 1995 – Mar 2020 |
| Mahaffey G-3-148164 | Giddings (Austin Chalk, Gas) | Snyder Oil Corporation | 1 | 0 | 208K | Jan 1994 – Jan 1995 |
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.
- 1Dale Operating CompanyJan 1994 → Jul 1994
- 2Snyder Oil CorporationAug 1994 → Dec 1996
- 3Rosewood Resources, Inc.Jan 1997 → May 1997
- 4Stephens, Autry C.Jun 1997 → Aug 2000
- 5Endeavor Energy Resources L.P.Sep 2000 → Sep 2015
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 430734-99 | Recompletion · sidetrack | Snyder Oil Corporation | Dec 7, 1994 | Dec 13, 1994 | Dec 12, 1994 | 14,650 |
| 417525-99 | Drill | Dale Operating Company | Oct 26, 1993 | Oct 26, 1993 | Nov 13, 1993 | 10,800 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-3-148164 | — | — | — | — |
| — | — O-3-22906 | — | — | — | — |
| — | — O-3-22906 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 308 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Pecan Gap | 10,086 | -9,778 |
| Austin Chalk | 10,606 | -10,298 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 10,655 | 10,945 | Perforated |
| 10,655 | 13,211 | Perforated |
| 10,655 | 14,222 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 3,310 | 14.75 | 1,550 S |
| 7.625 | 10,630 | 9.875 | 895 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 | Aug 5, 1996 | Dec 14, 1995 | Yes |
| 00 | Mar 20, 1996 | — | — |
| 00 | Mar 14, 1994 | Feb 3, 1994 | Yes |
| 00 | Mar 2, 1994 | — | — |
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 42-041-31786 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-041-31786 → 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/04131786, documented in the API reference.