TEXAS · WELLS · HARRIS COUNTY · API 42-201-31588 · DISTRICT 03
Tomball Gas Unit 9 #20
Harris County · Tomball (Cockfield Upper 5500SW) field · Directional
Tomball Gas Unit 9 #20 (API 42-201-31588) is a plugged well in Harris County, plugged November 25, 2013, last operated by Tandem Energy Corporation.
The RRC has issued 4 drilling permits between 1983 and 1993, permitted to 6,518 ft.
It was permitted by Exxon Corp. and has since transferred to Tandem Energy Corporation on the wellbore schedule.
Completion filings report 6 formation tops, including Kobs, Sid Moore, Main Schultz, Lower Schultz.
Operator of record
Permitted by Exxon Corp.; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- Jun 24, 2026
- Permits on file
- 138
- Phone
- (713) 364-7822
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | none |
| Production reports | none |
| Latest permit | Exxon Corp.Sep 14, 1993 |
- 6,518
- total depth, ft
- 4
- permits on file
- Sep 14, 1993
- last permit issued
- Dec 29, 1993
- completed
- 0
- cumulative oil, bbl
- 0
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Dec 2013
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Dec 29, 1993
- Shut in
- —
- Plugged
- Nov 25, 2013
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 |
|---|---|---|---|---|---|---|
| Tomball Gas Unit 9 G-3-148471 | Tomball (Cockfield Upper 5500SW) | Tandem Energy Corporation | 1 | 0 | 0 | Dec 1993 – Dec 2013 |
| Milo, E.F. O-3-20238 | Tomball (Petrich) | Exxon Corp. | 1 | 0 | 0 | Jan 1993 – Mar 1994 |
No volumes reported on these leases in the last three years.
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 416016-99 | Recompletion | Exxon Corp. | Sep 14, 1993 | Sep 14, 1993 | Dec 14, 1993 | 6,518 |
| 362417-99 | Recompletion | Exxon Corp. | Aug 7, 1989 | Sep 5, 1989 | — | 5,721 |
| 346728-99 | Recompletion | Exxon Corp. | May 19, 1988 | Jun 14, 1988 | — | 5,707 |
| 210759-99 | Drill | Exxon Corp. | Oct 7, 1983 | Aug 23, 1983 | — | 6,100 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Dec 29, 1993 | Tomball Gas Unit 9 G-3-148471 | Tomball (Cockfield Upper 5500SW) | Tandem Energy Corporation | Plugged | — |
| Aug 16, 1988 | Milo E.F. O-3-20238 | Tomball (Petrich) | Exxon Corp. | Plugged | — |
| Jan 18, 1984 | Milo E. F. O-3-8383 | Tomball (Schultz SE.) | Tandem Energy Corporation | Plugged | — |
Formation tops
As filed on W-2/G-1. Subsea from 172 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Kobs | 5,506 | -5,334 |
| Sid Moore | 5,575 | -5,403 |
| Main Schultz | 5,580 | -5,408 |
| Lower Schultz | 5,606 | -5,434 |
| Petrich | 5,630 | -5,458 |
| Retrich | 5,630 | -5,458 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 5,460 | 5,468 | Perforated |
| 5,580 | 5,584 | Perforated |
| 5,630 | 5,633 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 1,973 | 12.25 | 1,060 S |
| 5.5 | 5,707 | 8.5 | 250 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 2, 1994 | Mar 10, 1994 | Yes |
| 00 | Mar 17, 1994 | — | — |
| 00 | Oct 6, 1988 | Sep 15, 1988 | Yes |
| 00 | Sep 22, 1988 | — | — |
| 00 | Apr 24, 1984 | Mar 2, 1984 | — |
| 00 | Apr 13, 1984 | Mar 2, 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 42-201-31588 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-201-31588 → 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/20131588, documented in the API reference.