TEXAS · WELLS · GRIMES COUNTY · API 42-185-30514 · DISTRICT 03
O Brien DL #1H
Grimes County · Giddings (Austin Chalk-3) field · Producing · Horizontal
O Brien DL #1H (API 42-185-30514) is a horizontal well in Grimes County operated by Magnolia Oil & Gas Operating LLC, completed February 2, 1999 and listed as producing on the RRC schedule, shut in December 1, 2021.
The RRC has issued 3 drilling permits (amended once) between 1995 and 1998, permitted to 17,276 ft.
It was permitted by Chesapeake Operating, Inc. and has since transferred to Magnolia Oil & Gas Operating LLC on the wellbore schedule.
Completion filings report 2 formation tops, including Austin Chalk, Buda.
No lease production has been reported under this well’s leases.
Operator of record
Magnolia Oil & Gas Operating LLC
Permitted by Chesapeake Operating, Inc.; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- May 6, 2026
- Permits on file
- 615
- Phone
- (713) 842-9050
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Magnolia Oil & Gas Operating LLC |
| Production reports | Magnolia Oil & Gas Operating LLCthrough Jan 2024 |
| Latest permit | Chesapeake Operating, Inc.Dec 2, 1998 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 17,276
- total depth, ft
- 4
- permits on file
- Dec 2, 1998
- last permit issued
- Feb 2, 1999
- completed
- 0
- cumulative oil, bbl
- 8.74M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jun 1995 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Feb 2, 1999
- Shut in
- Dec 1, 2021
- 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 2 leases this well is completed on; they carry 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| O'Brien DL G-3-173651 | Giddings (Austin Chalk, Gas) | Magnolia Oil & Gas Operating LLC | 1 | 0 | 6.92M | Feb 1999 – Jul 2026 |
| Perry G-3-155858 | Navasota River (Cretaceous Lwr.) | Chesapeake Operating, Inc. | 1 | 0 | 1.82M | Jun 1995 – Feb 1999 |
Gas, mcf lease total
Last 12 months 0 · prior 12 0
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Chesapeake Operating, Inc.Jun 1995 → Jun 2009
- 2Enervest Operating, L.L.C.Jul 2009 → Jul 2018
- 3Magnolia Oil & Gas Operating LLCAug 2018 → Jan 2024
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 481225-98 | Recompletion | Chesapeake Operating, Inc. | Dec 4, 1998 | Dec 2, 1998 | Dec 10, 1998 | 16,500 |
| 481225-99 | Recompletion | Chesapeake Operating, Inc. | Dec 2, 1998 | Dec 2, 1998 | — | 16,500 |
| 441474-99 | Recompletion | Chesapeake Operating, Inc. | Nov 1, 1995 | Nov 1, 1995 | Nov 4, 1995 | 13,400 |
| 434859-99 | Drill | Chesapeake Operating, Inc. | Apr 13, 1995 | Apr 13, 1995 | Apr 17, 1995 | 13,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Feb 2, 1999 | O Brien DL G-3-173651 | Giddings (Austin Chalk-3) | Magnolia Oil & Gas Operating LLC | Producing · shut in Dec 1, 2021 | 17,276 |
| Nov 29, 1995 | Perry G-3-155858 | Navasota River (Cretaceous Lwr.) | Chesapeake Operating Inc. | Not on Schedule | — |
| Nov 29, 1995 | Perry G-3-155858 | Navasota River (Cretaceous Lwr.) | Chesapeake Operating Inc. | Not on Schedule | — |
Formation tops
As filed on W-2/G-1. Subsea from 196 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Austin Chalk | 11,745 | -11,549 |
| Buda | 12,781 | -12,585 |
| BudaBUDA (GEORGETOWN) | 12,781 | -12,585 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 11,754 | 12,945 | Perforated |
| 11,754 | 15,402 | Perforated |
| 12,789 | 16,187 | Perforated |
| 12,789 | 17,276 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 2,747 | 17 | 1,548 S |
| 12.75 | 2,747 | 17 | 1,548 S |
| 9.625 | 11,845 | 12.25 | 1,355 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 | Aug 19, 1999 | Mar 9, 1999 | Yes |
| 00 | Aug 4, 1999 | — | — |
| 00 | May 23, 1996 | Mar 7, 1996 | Yes |
| 00 | Dec 11, 1995 | Jul 12, 1995 | Yes |
| 00 | Nov 8, 1995 | — | — |
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 42-185-30514 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-185-30514 → 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/18530514, documented in the API reference.