WELL · 42-003-46398 · DISTRICT 8
Kolb 31-5 #16
Andrews County · Spraberry (Trend Area) field · Producing · Vertical
Kolb 31-5 #16 (API 42-003-46398) is a well in Andrews County operated by Sabalo II Operating LLC, completed January 22, 2015 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued July 22, 2014, permitted to 10,022 ft.
It was permitted by Williams, Clayton Energy, Inc. and has since transferred to Sabalo II Operating LLC on the wellbore schedule.
Completion filings report 17 formation tops, including Yates, Seven Rivers, Queen, Grayburg.
Its lease has reported 1.02M barrels of oil and 2.15M mcf of gas since June 2010, last reporting in July 2026. The lease carries 15 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Williams, Clayton Energy, Inc.; the EWA schedule now lists a different operator.
- Based in
- Corpus Chrsti, TX
- P-5 status
- Active (A)
- P-5 last filed
- Feb 25, 2026
- Permits on file
- 73
- Phone
- (361) 888-7708
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Sabalo II Operating LLC |
| Production reports | Sabalo II Operating, LLCthrough Apr 2026 |
| Latest permit | Williams, Clayton Energy, Inc.Jul 22, 2014 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,022
- total depth, ft
- 1
- permits on file
- Jul 22, 2014
- last permit issued
- Jan 22, 2015
- completed
- 1.02M
- cumulative oil, bbl
- 2.15M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jun 2010 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jan 22, 2015
- 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; they carry 15 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Kolb "31-5" O-10-40516 | Spraberry (Trend Area) | Sabalo II Operating, LLC | 15 | 1.02M | 2.15M | Jun 2010 – Jul 2026 |
Oil, barrels lease total
Last 12 months 33,335 · prior 12 35,734(-7%)
Gas, mcf lease total
Last 12 months 102,191 · prior 12 93,801(+9%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Williams, Clayton Energy, Inc.Jun 2010 → Mar 2017
- 2NBL Permian LLCApr 2017 → Sep 2017
- 3Throne Petroleum Resources LLCOct 2017 → Aug 2021
- 4Montrose Operating LLCSep 2021 → May 2024
- 5Sabalo II Operating, LLCJun 2024 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 788622-99 | Drill | Williams, Clayton Energy, Inc. | Jun 4, 2014 | Jul 22, 2014 | Aug 20, 2014 | 10,800 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jan 22, 2015 | Kolb 31-5 O-10-40516 | Spraberry (Trend Area) | Sabalo II Operating LLC | Producing | 10,022 |
Formation tops
As filed on W-2/G-1. Subsea from 3,103 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Yates | 3,235 | -132 |
| Seven Rivers | 3,478 | -375 |
| Queen | 4,664 | -1,561 |
| Grayburg | 4,733 | -1,630 |
| San AndresSAN ANDRES - CO2 FLOOD, HIGH FLO | 5,077 | -1,974 |
| Glorieta | 5,700 | -2,597 |
| Clear ForkCLEARFORK | 7,050 | -3,947 |
| Canyon | — | — |
| Devonian | — | — |
| Fusselman | — | — |
| Holt | — | — |
| McKee | — | — |
| Pennsylvanian | — | — |
| Permian (undifferentiated)PERMIAN DETRITAL | — | — |
| Strawn | — | — |
| Tubb | — | — |
| Wichita-AlbanyWICHITA ALBANY | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,958 | 9,052 | Perforated |
| 8,958 | 9,980 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 420 | 17.5 | 440 S |
| 8.625 | 4,925 | 11 | 1,295 S |
| 5.5 | 10,022 | 7.875 | 880 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 | Mar 27, 2015 | Feb 9, 2015 | — |
| 00 | Jan 23, 2015 | Nov 20, 2014 | Yes |
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 42-003-46398 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-003-46398 → 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/00346398, documented in the API reference.