WELL · 42-287-31190 · DISTRICT 3
Guelker Unit #2
Lee County · Giddings (Austin Chalk-3) field · Producing · Horizontal · Sidetrack
Guelker Unit #2 (API 42-287-31190) is a horizontal well in Lee County operated by Magnolia Oil & Gas Operating LLC, completed May 15, 1995 and listed as producing on the RRC schedule.
The RRC has issued 2 drilling permits between 1982 and 1995, permitted to 10,000 ft.
It was permitted by Gemini Exploration Company and has since transferred to Magnolia Oil & Gas Operating LLC on the wellbore schedule.
Completion filings report one formation top, including Austin Chalk.
Its lease has reported 175K barrels of oil and 1.14M mcf of gas since January 1993, last reporting in July 2026. The lease carries 2 wells, so these are lease totals, not this well alone.
Operator of record
Magnolia Oil & Gas Operating LLC
Permitted by Gemini Exploration Company; the EWA schedule now lists a different operator.
Houston, TX · P-5 Y, filed Mar 4, 2026 · 615 permits on file · (713) 345-6206
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Magnolia Oil & Gas Operating LLC |
| Production reports | Magnolia Oil & Gas Operating LLCthrough Mar 2026 |
| Latest permit | Gemini Exploration CompanyApr 6, 1995 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,000
- total depth, ft
- 2
- permits on file
- Apr 6, 1995
- last permit issued
- May 15, 1995
- completed
- 175K
- cumulative oil, bbl
- 1.14M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- May 15, 1995
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: 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 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Guelker Unit O-3-14971 | Giddings (Austin Chalk-3) | Magnolia Oil & Gas Operating LLC | 2 | 175K | 1.14M | Jan 1993 – Jul 2026 |
Oil, barrels lease total
Last 12 months 841 · prior 12 2,933(-71%)
Gas, mcf lease total
Last 12 months 8,617 · prior 12 13,083(-34%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1E.G. OperatingJan 1993 → Sep 1993
- 2Gemini Exploration CompanyOct 1993 → Apr 1995
- 3Union Pacific Austin Chalk Co.May 1995 → Jan 2001
- 4Rme Austin Chalk CompanyFeb 2001 → Nov 2002
- 5Anadarko Austin Chalk CompanyDec 2002 → Feb 2006
- 6Anadarko E&P Company LPMar 2006 → Jul 2007
- 7Enervest Operating, L.L.C.Aug 2007 → Jul 2018
- 8Magnolia Oil & Gas Operating LLCAug 2018 → Oct 2025
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 434578-99 | Recompletion · sidetrack | Gemini Exploration Company | Apr 6, 1995 | Apr 6, 1995 | Apr 3, 1995 | 9,400 |
| 151705-99 | Drill | Tipco | Feb 24, 1982 | Feb 24, 1982 | — | 10,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-3-14971 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 275 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Austin Chalk | 8,630 | -8,355 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,922 | 10,517 | Perforated |
| 8,922 | 11,660 | Perforated |
| 91,139 | 290 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 3,075 | 12.25 | 1,550 S |
| 9.625 | 3,705 | 12.25 | 1,550 S |
| 2.875 | 9,060 | — | — |
| 5.5 | 9,467 | 8.75 | 1,030 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 | Sep 26, 1995 | Jun 27, 1995 | Yes |
| 00 | Jan 12, 1984 | Mar 25, 1982 | — |
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 42-287-31190 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-287-31190 → 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/28731190, documented in the API reference.