WELL · 42-177-31902 · DISTRICT 1
Najvar-Kullin Unit #1
Gonzales County · Christian (6800) field · Horizontal
Najvar-Kullin Unit #1 (API 42-177-31902) is a plugged horizontal well in Gonzales County, plugged January 22, 2011, last operated by Tdc Engineering Inc..
The RRC has issued one drilling permit, issued April 15, 1991, permitted to 14,500 ft.
It was permitted by Union Pacific Resources Company and has since transferred to Tdc Engineering Inc. on the wellbore schedule.
Completion filings report 5 formation tops, including Midway, Navarro, Olmos, Anacacho.
Its lease has reported 48.4K barrels of oil and 22.4K mcf of gas since January 1993, last reporting in May 2011.
Operator of record
Permitted by Union Pacific Resources Company; the EWA schedule now lists a different operator.
Abilene, TX · P-5 Active, filed Oct 16, 2025 · 227 permits on file · (325) 673-5024
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | TDC Engineering Inc. |
| Production reports | TDC Engineering, Inc.through Dec 2010 |
| Latest permit | Union Pacific Resources CompanyApr 15, 1991 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 14,500
- total depth, ft
- 1
- permits on file
- Apr 15, 1991
- last permit issued
- Jul 10, 1991
- completed
- 48.4K
- cumulative oil, bbl
- 22.4K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH May 2011
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jul 10, 1991
- Shut in
- —
- Plugged
- Jan 22, 2011
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 |
|---|---|---|---|---|---|---|
| Najvar-Kullin Unit O-1-13246 | Christian (6800) | TDC Engineering, Inc. | 1 | 48.4K | 22.4K | Jan 1993 – May 2011 |
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.
- 1Union Pacific Resources CompanyJan 1993 → Mar 1993
- 2Torch Operating CompanyApr 1993 → Nov 1994
- 3Southwest Oil & Land, Inc.Dec 1994 → Aug 1996
- 4Petrox Resources Inc.Sep 1996 → Apr 2009
- 5TDC Engineering, Inc.Oct 2009 → Dec 2010
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 386810-99 | Drill | Union Pacific Resources Company | Apr 15, 1991 | Apr 15, 1991 | Apr 20, 1991 | 14,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-13246 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 290 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Midway | 6,090 | -5,800 |
| Navarro | 7,150 | -6,860 |
| OlmosTOP OLMOS | 7,760 | -7,470 |
| Anacacho | 8,645 | -8,355 |
| Austin Chalk | 8,894 | -8,604 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,269 | 13,709 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 796 | 14.75 | 800 S |
| 7.625 | 9,269 | 9.875 | 250 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 | Oct 8, 1991 | Jul 19, 1991 | Yes |
| 00 | Sep 30, 1991 | — | — |
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 42-177-31902 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-177-31902 → 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/17731902, documented in the API reference.