WELL · 42-317-35967 · DISTRICT 8
Otb O Brien 43 #5
Martin County · Spraberry (Trend Area) field · Producing · Vertical
Otb O Brien 43 #5 (API 42-317-35967) is a well in Martin County operated by Diamondback E&P LLC, completed May 1, 2013 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued April 16, 2010, permitted to 12,000 ft.
It was permitted by Mak-J Energy Partners(TX),Ltd. and has since transferred to Diamondback E&P LLC on the wellbore schedule.
Completion filings report 4 formation tops, including Spraberry, Wolfcamp, Strawn, Devonian.
Its lease has reported 262K barrels of oil and 1.41M mcf of gas since January 2009, last reporting in July 2026. The lease carries 7 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Mak-J Energy Partners(tx),ltd.; the EWA schedule now lists a different operator.
Midland, TX · P-5 Y, filed Mar 4, 2026 · 5,237 permits on file · (855) 247-5920
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Diamondback E&P LLC |
| Production reports | Diamondback E&P LLCthrough Apr 2026 |
| Latest permit | Mak-J Energy Partners(tx),ltd.Apr 16, 2010 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 12,000
- total depth, ft
- 2
- permits on file
- Apr 16, 2010
- last permit issued
- May 1, 2013
- completed
- 262K
- cumulative oil, bbl
- 1.41M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 2009 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- May 1, 2013
- 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 7 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Otb O'Brien 43 O-10-39301 | Spraberry (Trend Area) | Diamondback E&P LLC | 7 | 262K | 1.41M | Jan 2009 – Jul 2026 |
Gas, mcf lease total
Last 12 months 50,545 · prior 12 52,389(-4%)
Oil, barrels lease total
Last 12 months 3,627 · prior 12 7,977(-55%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Mak-J Energy Partners(tx),ltd.Jan 2009 → Jun 2011
- 2Resolute Natural Res. Co., LLCJul 2011 → Apr 2015
- 3Qstar Operating LLCMay 2015 → May 2016
- 4Endeavor Energy Resources L.P.Jun 2016 → Dec 2024
- 5Diamondback E&P LLCJan 2025 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 694510-98 | Drill | Mak-J Energy Partners(tx),ltd. | Jun 10, 2011 | Apr 16, 2010 | Nov 15, 2010 | 12,000 |
| 694510-99 | Drill | Mak-J Energy Partners(tx),ltd. | Apr 15, 2010 | Apr 16, 2010 | Nov 15, 2010 | 12,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-39301 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,570 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,685 | 10,558 | Perforated |
| 9,204 | 10,558 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 5,044 | 14.75 | 1,725 S |
| 5.5 | 10,900 | 7.875 | 1,175 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 | May 8, 2015 | Apr 9, 2015 | — |
| 00 | Feb 16, 2012 | May 3, 2011 | 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 42-317-35967 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-317-35967 → 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/31735967, documented in the API reference.