TEXAS · WELLS · KARNES COUNTY · CHESLYN UNIT LEASE · API 42-255-31945 · DISTRICT 02
Cheslyn Unit #4
Karnes County · Eagleville (Eagle Ford-2) field · Shut In · Vertical
Cheslyn Unit #4 (API 42-255-31945) is a well in Karnes County operated by Eog Resources Inc., completed June 17, 2022 and listed as shut in on the RRC schedule, shut in November 1, 2017.
The RRC has issued one drilling permit, issued April 29, 2011, permitted to 10,950 ft.
Completion filings report 3 formation tops, including Anacacho, Austin Chalk, Eagle Ford.
Its lease has reported 1.54M barrels of oil and 3.18M mcf of gas since June 2011, last reporting volume in April 2026. The lease carries 8 wells, so these are lease totals, not this well alone.
Operator of record
- Based in
- Midland, TX
- P-5 status
- Active (A)
- P-5 last filed
- Oct 2, 2025
- Permits on file
- 16,354
- Phone
- (713) 651-7000
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | EOG Resources Inc. |
| Production reports | EOG Resources, Inc.through Apr 2026 |
| Latest permit | EOG Resources, Inc.Apr 29, 2011 |
- 10,950
- total depth, ft
- 1
- permits on file
- Apr 29, 2011
- last permit issued
- Jun 17, 2022
- completed
- 1.54M
- cumulative oil, bbl
- 3.18M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jul 2011 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jun 17, 2022
- Shut in
- Nov 1, 2017
- Plugged
- —
Operator's P-5 on the schedule: Active – Extension (X)
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 8 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Cheslyn Unit O-2-9700 | Eagleville (Eagle Ford-2) | EOG Resources, Inc. | 8 | 1.54M | 3.18M | Jun 2011 – Apr 2026 |
Oil, barrels lease total
Last 12 months 23,709 · prior 12 26,065(-9%)
Gas, mcf lease total
Last 12 months 68,172 · prior 12 79,082(-14%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1EOG Resources, Inc.Jul 2011 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 714454-99 | Drill | EOG Resources, Inc. | Apr 18, 2011 | Apr 29, 2011 | Jun 5, 2011 | 12,400 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jun 17, 2022 | Cheslyn Unit O-2-9700 | Eagleville (Eagle Ford-2) | EOG Resources Inc. | Shut In · shut in Nov 1, 2017 | 10,950 |
Formation tops
As filed on W-2/G-1. Subsea from 333 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Anacacho | 9,595 | -9,262 |
| Austin Chalk | 9,882 | -9,549 |
| Eagle Ford | 10,228 | -9,895 |
| Anacacho | — | — |
| Austin Chalk | — | — |
| Eagle Ford | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 10,746 | 10,767 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 650 | 17.5 | 380 S |
| 9.625 | 4,617 | 12.25 | 1,510 S |
| 7 | 10,947 | 8.5 | 560 S |
| 5.5 | 10,947 | 8.5 | 560 S |
| 9.625 | — | 12.25 | 930 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. The record date is the RRC's own date on the record, not the day the report was filed: 462,034 of the state's filings carry 1984-01-12. About these reports →
| Suffix | RRC record date | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Jul 18, 2022 | Jun 20, 2022 | — |
| 00 | Oct 17, 2017 | Oct 17, 2017 | — |
| 00 | Sep 16, 2016 | Sep 12, 2016 | — |
| 00 | Jan 23, 2012 | Sep 23, 2011 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received Jun 2, 2014. Resistivity. These are the logs loaded into Petrora from the Railroad Commission's inventories, not necessarily every log run on the well. The RRC holds the files; each opens from its log search for the well. The kind is the RRC's description of the log; the interval is the one filed for it.
Open the RRC's log search for this well ↗| Logas described | Files | Intervalft, as filed | Datereceived | SizeMB |
|---|---|---|---|---|
| RESISTIVITYSpans Anacacho, Austin Chalk, Eagle Ford | TIFF | 9,875 to 10,732 | Jun 2, 2014run Jun 15, 2011 | 0.44 |
"Spans" is by this well's own filed formation tops: a formation runs from its top to the next deeper top filed, and the deepest runs to the bottom of the log. Depths are measured along the wellbore, so on a horizontal the lateral counts in the formation it was landed in.
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 42-255-31945 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-255-31945 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search for it.
Beyond the permit record
RRC UIC permits · H-10 reported volumes
Injection
- 0
- bbl, last 12 reported months
- 0
- bbl, all reported
- Mar 2022
- reported through
| UIC | Kind | Status | Permitted bbl/d | Max psi | Zone ft |
|---|---|---|---|---|---|
| 000114495 | H-1 Injection | Canceled Dec 22, 2022 | 0 | 0 | 10,476–10,786 |
MONTHLY INJECTED, BBL · H-10 · LAST 24 REPORTED MONTHS
Last 12 months 0 · prior 12 0
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/25531945, documented in the API reference.