WELL · 42-339-30407 · DISTRICT 3
Conroe Field Unit #310
Montgomery County · Conroe field · Vertical
Conroe Field Unit #310 (API 42-339-30407) is a well in Montgomery County operated by Highmark Energy Operating LLC, completed September 24, 1997.
The RRC has issued one drilling permit, issued June 12, 1978, permitted to 5,800 ft.
It was permitted by Exxon Corp. and has since transferred to Highmark Energy Operating LLC on the wellbore schedule.
Completion filings report 6 formation tops, including Frio, Vicksburg, Jackson, Cockfield.
Its lease has reported 26.7M barrels of oil and 61.4M mcf of gas since January 1993, last reporting in July 2026. The lease carries 664 wells, so these are lease totals, not this well alone.
It holds an active disposal or injection permit, with 4.65M barrels injected in the 12 months reported through March 2026.
Operator of record
Permitted by Exxon Corp.; the EWA schedule now lists a different operator.
Houston, TX · P-5 Y, filed Dec 4, 2025 · 23 permits on file · (903) 876-2591
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Highmark Energy Operating LLC |
| Production reports | Highmark Energy Operating, LLCthrough Apr 2026 |
| Latest permit | Exxon Corp.Jun 12, 1978 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 5,800
- total depth, ft
- 1
- permits on file
- Jun 12, 1978
- last permit issued
- Sep 24, 1997
- completed
- 26.7M
- cumulative oil, bbl
- 61.4M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Sep 24, 1997
- Shut in
- —
- Plugged
- —
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 664 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Conroe Field Unit O-3-11659 | Conroe | Highmark Energy Operating, LLC | 664 | 26.7M | 61.4M | Jan 1993 – Jul 2026 |
Oil, barrels lease total
Last 12 months 528,577 · prior 12 506,957(+4%)
Gas, mcf lease total
Last 12 months 174,487 · prior 12 323,330(-46%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Exxon Corp.Jan 1993 → Mar 2000
- 2Exxon Mobil CorporationApr 2000 → Aug 2006
- 3Wapiti Operating, LLCSep 2006 → Dec 2009
- 4Denbury Onshore, LLCJan 2010 → Oct 2024
- 5Highmark Energy Operating, LLCNov 2024 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 26701-99 | Drill | Exxon Corp. | Jun 12, 1978 | Jun 12, 1978 | — | 5,800 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-3-11659 | — | — | — | — |
| — | — O-3-11659 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 165 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 3,090 | 3,140 | Perforated |
| 3,750 | 3,780 | Perforated |
| 4,881 | 4,888 | Perforated |
| 4,896 | 4,906 | Perforated |
| 4,928 | 4,935 | Perforated |
| 4,945 | 4,954 | Perforated |
| 4,962 | 4,972 | Perforated |
| 4,968 | 4,978 | Perforated |
| 4,992 | 4,997 | Perforated |
| 5,018 | 5,024 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 16 | 302 | 20 | 375 S |
| 10.75 | 706 | 14.75 | 800 S |
| 2.875 | 4,625 | — | — |
| 7 | 5,199 | 9.875 | 1,005 S |
| 7 | — | 9.875 | 330 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 | Sep 15, 2021 | Sep 14, 2021 | — |
| 00 | Oct 20, 2016 | Oct 18, 2016 | — |
| 00 | Apr 16, 2015 | Apr 1, 2015 | — |
| 00 | Mar 11, 2015 | Feb 2, 2015 | — |
| 00 | Aug 20, 2002 | Jun 21, 2002 | — |
| 00 | Jul 10, 2002 | Jan 22, 1998 | — |
| 00 | Feb 6, 1998 | Jan 22, 1998 | — |
| 00 | Dec 1, 1994 | Nov 14, 1994 | — |
| 00 | Oct 7, 1991 | Sep 19, 1991 | — |
| 00 | Oct 9, 1989 | Aug 31, 1989 | — |
| 00 | Nov 18, 1987 | Oct 29, 1987 | — |
| 00 | Jul 2, 1984 | Jun 12, 1984 | — |
| 00 | Jan 12, 1984 | Jun 12, 1984 | — |
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 42-339-30407 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-339-30407 → 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.
Beyond the permit record
RRC UIC permits · H-10 reported volumes
Injection
- 4.65M
- bbl, last 12 reported months
- 78.7M
- bbl, all reported
- Mar 2026
- reported through
| UIC | Kind | Status | Permitted bbl/d | Max psi | Zone ft |
|---|---|---|---|---|---|
| 000090474 | W-14 Disposal | Active | 25,000 | 1,200 | 2,400–4,020 |
MONTHLY INJECTED, BBL · H-10 · LAST 24 REPORTED MONTHS
Last 12 months 4,645,037 · prior 12 5,671,662(-18%)
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/33930407, documented in the API reference.