WELL · 42-255-35274 · DISTRICT 2
Patsy-Clark Unit #18H
Karnes County · Sugarkane (Austin Chalk) field · Producing · Horizontal
Patsy-Clark Unit #18H (API 42-255-35274) is a horizontal well in Karnes County operated by Devon Energy Production CO L.P., completed April 26, 2017 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued January 24, 2017, permitted to 11,000 ft.
It was permitted by Encana Oil & Gas(USA) Inc. and has since transferred to Devon Energy Production CO L.P. on the wellbore schedule.
Completion filings report 10 formation tops, including Yegua, Queen City, Reklaw, Carrizo.
Its lease has reported 836K barrels of oil and 1.78M mcf of gas since December 2016, last reporting in July 2026. The lease carries 5 wells, so these are lease totals, not this well alone.
Operator of record
Devon Energy Production Co L.P.
Permitted by Encana Oil & Gas(usa) Inc.; the EWA schedule now lists a different operator.
- Based in
- Oklahoma City, OK
- P-5 status
- Active (A)
- P-5 last filed
- Dec 18, 2025
- Permits on file
- 9,266
- Phone
- (405) 235-3611
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Devon Energy Production Co L.P. |
| Production reports | Devon Energy Production Co, L.P.through Apr 2026 |
| Latest permit | Encana Oil & Gas(usa) Inc.Jan 24, 2017 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 11,000
- total depth, ft
- 2
- permits on file
- Jan 24, 2017
- last permit issued
- Apr 26, 2017
- completed
- 836K
- cumulative oil, bbl
- 1.78M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Dec 2016 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Apr 26, 2017
- Shut in
- —
- 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 lease this well is completed on; they carry 5 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Patsy-Clark Unit O-2-11334 | Sugarkane (Austin Chalk) | Devon Energy Production Co, L.P. | 5 | 836K | 1.78M | Dec 2016 – Jul 2026 |
Oil, barrels lease total
Last 12 months 34,152 · prior 12 47,889(-29%)
Gas, mcf lease total
Last 12 months 188,450 · prior 12 194,322(-3%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Encana Oil & Gas(usa) Inc.Dec 2016 → Jan 2020
- 2Ovintiv USA Inc.Feb 2020 → Apr 2021
- 3Validus NRG Aquilas Assetco LLCMay 2021 → Aug 2022
- 4Devon Energy Production Co, L.P.Sep 2022 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 822085-98 | Drill | Encana Oil & Gas(usa) Inc. | Apr 13, 2017 | Jan 24, 2017 | Feb 27, 2017 | 10,900 |
| 822085-99 | Drill | Encana Oil & Gas(usa) Inc. | Jan 12, 2017 | Jan 24, 2017 | Feb 26, 2017 | 11,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-2-11334 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 426 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| YeguaYEGUA - DISPOSAL | 1,047 | -621 |
| Queen City | 2,906 | -2,480 |
| Reklaw | 3,261 | -2,835 |
| Carrizo | 3,805 | -3,379 |
| WilcoxWILCOX - DISPOSAL | 5,653 | -5,227 |
| Austin ChalkAUSTIN CHALK - H2S | 10,392 | -9,966 |
| Eagle FordEAGLE FORD - H2S | — | — |
| EdwardsEDWARDS - H2S | — | — |
| FrioFRIO - DISPOSAL | — | — |
| SligoSLIGO - H2S | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 10,607 | 15,537 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 4,874 | 12.25 | 1,325 S |
| 5.5 | 15,574 | 8.5 | 2,499 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 | Jun 15, 2018 | Jan 4, 2018 | 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 42-255-35274 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-255-35274 → 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/25535274, documented in the API reference.