TEXAS · WELLS · ANDREWS COUNTY · KOLB "31-5" LEASE · API 42-003-44864 · DISTRICT 7B
Kolb 31-5 #2
Andrews County · Spraberry (Trend Area) field · Shut In · Vertical
- Fields on the latest permit · any of 2
- Magutex (Strawn) · Spraberry (Trend Area)
- Not one formation; the well must be completed in one of them, and no target formation is stated.
Kolb 31-5 #2 (API 42-003-44864) is a well in Andrews County operated by Sabalo II Operating LLC, completed May 3, 2014 and listed as shut in on the RRC schedule, shut in April 1, 2025.
The RRC has issued 2 drilling permits between 2010 and 2012, permitted to 11,130 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 3 formation tops, including Clear Fork, Wolfcamp, Strawn.
Its lease has reported 1.02M barrels of oil and 2.15M mcf of gas since June 2010, last reporting volume in April 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.Oct 30, 2012 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 11,130
- total depth, ft
- 2
- permits on file
- Oct 30, 2012
- last permit issued
- May 3, 2014
- completed
- 1.02M
- cumulative oil, bbl
- 2.15M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · JUN 2010 THROUGH APR 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- May 3, 2014
- Shut in
- Apr 1, 2025
- 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.
Wells nearby
Every well with a location on file around this well, in any state, nearest first.
Texas locations come from drilling permits, so most older Texas wells have none and are not listed.
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 – Apr 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%)
Wells named Kolb 31-5
Sabalo II Operating LLC's other wells filed under this lease name in Andrews County, newest permit first. The RRC gives a gas well its own lease number, so the name is what joins the wells of a unit.
Loading the lease's wellsChain 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 |
|---|---|---|---|---|---|---|
| 749919-99 | Drill | Williams, Clayton Energy, Inc. | Oct 15, 2012 | Oct 30, 2012 | Dec 13, 2012 | 11,100 |
| 702944-99 | Drill | Williams, Clayton Energy, Inc. | Sep 29, 2010 | Oct 1, 2010 | — | 11,100 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| May 3, 2014 | Kolb 31-5 O-10-40516 | Spraberry (Trend Area) | Sabalo II Operating LLC | Shut In · shut in Apr 1, 2025 | 11,130 |
Formation tops
As filed on W-2/G-1. Subsea from 3,060 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Clear ForkCLEARFORK | 7,186 | -4,126 |
| Wolfcamp | 9,258 | -6,198 |
| Strawn | 10,437 | -7,377 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,430 | 9,240 | Perforated |
| 9,270 | 10,918 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 1,775 | 17.5 | 1,625 S |
| 8.625 | 5,005 | 11 | 1,180 S |
| 5.5 | 11,130 | 7.875 | 1,140 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. The record date is the RRC's own date on the record, not the day the report was filed: 462,034 of the state's filings carry 1984-01-12. About these reports →
| Suffix | RRC record date | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Jul 31, 2014 | Jul 29, 2014 | — |
| 00 | Feb 18, 2014 | Jul 15, 2013 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received Feb 2, 2016. Density, Neutron. These are the logs loaded into Petrora from the Railroad Commission's inventories, not necessarily every log run on the well. The RRC holds the files; each opens from its log search for the well. The kind is the RRC's description of the log; the interval is the one filed for it.
Open the RRC's log search for this well ↗| Logas described | Files | Intervalft, as filed | Datereceived | SizeMB |
|---|---|---|---|---|
| NEUTRON/DENSITY POROSITYSpans Clear Fork, Wolfcamp, Strawn | TIFF | 200 to 11,139 | Feb 2, 2016run Jan 3, 2013 | 3.92 |
"Spans" is by this well's own filed formation tops: a formation runs from its top to the next deeper top filed, and the deepest runs to the bottom of the log. Depths are measured along the wellbore, so on a horizontal the lateral counts in the formation it was landed in.
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 42-003-44864 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-003-44864 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search for it. The University Lands library has no per-well link: then paste it into its 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/00344864, documented in the API reference.