WELL · 42-391-32512 · DISTRICT 2
O Brien J. M. #109
Refugio County · Greta Deep (5700 Seg. N) field · Vertical
O Brien J. M. #109 (API 42-391-32512) is a plugged well in Refugio County, plugged March 29, 2018, last operated by Primrose Operating Company.
The RRC has issued 4 drilling permits (amended twice) between 2003 and 2008, permitted to 7,000 ft.
It was permitted by Cambrian Management, Ltd. and has since transferred to Primrose Operating Company on the wellbore schedule.
Completion filings report one formation top, including Greta.
Its 5 leases have reported 495K barrels of oil and 580K mcf of gas since January 1993, last reporting in July 2026. The leases carry 19 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Cambrian Management, Ltd.; the EWA schedule now lists a different operator.
Wichita Falls, TX · P-5 Y, filed Nov 6, 2009 · 274 permits on file
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Primrose Operating Company |
| Production reports | Dorchester Operating Company LLCthrough Apr 2026 |
| Latest permit | Cambrian Management, Ltd.Jul 21, 2008 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 7,000
- total depth, ft
- 6
- permits on file
- Jul 21, 2008
- last permit issued
- Oct 9, 2003
- completed
- 495K
- cumulative oil, bbl
- 580K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Oct 9, 2003
- Shut in
- —
- Plugged
- Mar 29, 2018
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 5 leases this well is completed on; they carry 19 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| O'Brien, J. M. O-2-3981 | Greta (4400) | Dorchester Operating Company LLC | 10 | 380K | 252K | Jan 1993 – Jul 2026 |
| O'Brien, J.M. G-2-254909 | Greta (L-12) | Acock/Anaqua Operating Co., LP | 1 | 0 | 6.92K | Nov 2009 – Mar 2018 |
| O'Brien, J. M. G-2-234411 | Greta (O-1) | Cambrian Management, Ltd. | 1 | 0 | 0 | Feb 2008 – Nov 2009 |
| Obrien, J. M. O-2-3997 | Greta (4400) | Primrose Operating Company | 6 | 116K | 98.9K | Jan 1993 – Oct 2005 |
| O'Brien, J. M. G-2-199111 | Greta, Deep (5700, Seg. N) | Primrose Operating Company | 1 | 0 | 222K | Oct 2003 – Feb 2005 |
Oil, barrels lease total
Last 12 months 4,832 · prior 12 5,674(-15%)
Gas, mcf lease total
Last 12 months 1,988 · prior 12 2,743(-28%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Dewbre Petroleum CorporationJan 1993 → Oct 2002
- 2Exxon Corp.Jan 1993 → Mar 2000
- 3Exxon Mobil CorporationApr 2000 → Oct 2001
- 4Primrose Operating CompanyNov 2001 → Mar 2007
- 5Cambrian Management LtdApr 2007 → Sep 2007
- 6Cambrian Management, Ltd.Oct 2007 → Oct 2010
- 7Acock/Anaqua Operating Co., LPNov 2010 → Nov 2020
- 8Dorchester Operating Company LLCDec 2020 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 665557-99 | Recompletion | Cambrian Management, Ltd. | Jun 27, 2008 | Jul 21, 2008 | Nov 23, 2009 | 3,550 |
| 650242-99 | Recompletion | Cambrian Management, Ltd. | Nov 27, 2007 | Jan 4, 2008 | Jan 10, 2008 | 3,550 |
| 557758-97 | Recompletion | Primrose Operating Company | Oct 20, 2005 | Feb 15, 2005 | Feb 14, 2005 | 5,755 |
| 557758-98 | Recompletion | Primrose Operating Company | Mar 4, 2005 | Feb 15, 2005 | Feb 14, 2005 | 5,755 |
| 557758-99 | Recompletion | Primrose Operating Company | Feb 15, 2005 | Feb 15, 2005 | — | 4,400 |
| 531231-99 | Drill | Primrose Operating Company | Apr 28, 2003 | May 13, 2003 | May 16, 2003 | 7,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-2-199111 | — | — | — | — |
| — | — G-2-234411 | — | — | — | — |
| — | — G-2-254909 | — | — | — | — |
| — | — O-2-3981 | — | — | — | — |
| — | — O-2-3997 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 61 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| GretaGRETA DEEP (5700 SEG. N.) | 5,730 | -5,669 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 2,432 | 2,434 | Perforated |
| 3,055 | 3,057 | Perforated |
| 4,352 | 4,354 | Perforated |
| 5,732 | 5,734 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 1,357 | 12.25 | 485 S |
| 5.5 | 6,020 | 7.875 | 710 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 | Apr 21, 2011 | Mar 2, 2005 | Yes |
| 00 | May 13, 2010 | Dec 11, 2009 | Yes |
| 00 | Mar 9, 2010 | — | — |
| 00 | Apr 30, 2008 | Mar 21, 2008 | Yes |
| 00 | Apr 18, 2008 | — | — |
| 00 | Sep 14, 2005 | — | — |
| 00 | Aug 12, 2005 | — | — |
| 00 | Aug 11, 2005 | — | — |
| 00 | Jun 23, 2005 | — | — |
| 00 | Apr 1, 2005 | Oct 23, 2003 | Yes |
| 00 | Feb 12, 2004 | — | — |
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 42-391-32512 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-391-32512 → 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/39132512, documented in the API reference.