WELL · 42-489-30877 · DISTRICT 4
Sauz Ranch Mulatos Pasture #204
Willacy County · Willamar West field · Vertical
Sauz Ranch Mulatos Pasture #204 (API 42-489-30877) is a well in Willacy County operated by Chestnut Explor. And Prod. Inc., completed March 11, 1986.
The RRC has issued one drilling permit, issued July 18, 1985, permitted to 9,070 ft.
It was permitted by Exxon Corp. and has since transferred to Chestnut Explor. And Prod. Inc. on the wellbore schedule.
Its 2 leases have reported 845K barrels of oil and 299K mcf of gas since January 1993, last reporting in July 2026. The leases carry 37 wells, so these are lease totals, not this well alone.
Operator of record
Chestnut Explor. and Prod. Inc.
Permitted by Exxon Corp.; the EWA schedule now lists a different operator.
Dallas, TX · P-5 Y, filed Sep 4, 2025 · 5 permits on file · (972) 342-7791
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Chestnut Explor. and Prod. Inc. |
| Production reports | Shoco Production LLCthrough Mar 2026 |
| Latest permit | Exxon Corp.Jul 18, 1985 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,070
- total depth, ft
- 1
- permits on file
- Jul 18, 1985
- last permit issued
- Mar 11, 1986
- completed
- 845K
- cumulative oil, bbl
- 299K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Mar 11, 1986
- 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 2 leases this well is completed on; they carry 37 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Sauz Ranch Mulatos Pasture O-4-3390 | Willamar, West | Chestnut Explor. and Prod., Inc. | 31 | 783K | 299K | Jan 1993 – Jul 2026 |
| Sauz Ranch Mulatos Pasture O-4-14076 | Willamar, West | Shoco Production LLC | 6 | 61.9K | 0 | May 2018 – Jul 2026 |
Oil, barrels lease total
Last 12 months 3,942 · prior 12 7,256(-46%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Exxon Corp.Jan 1993 → Dec 1995
- 2Parker & Parsley Development L.PJan 1996 → Aug 1997
- 3Pioneer Natural Res. USA, Inc.Sep 1997 → Mar 1999
- 4Prize Operating CompanyApr 1999 → Mar 2002
- 5Gruy Petroleum Management Co.Apr 2002 → Apr 2006
- 6Cimarex Energy Co. of ColoradoMay 2006 → May 2011
- 7Flint Oak Energy, LLCJun 2011 → Jul 2014
- 8Chestnut Explor. and Prod., Inc.Aug 2014 → May 2017
- 9Shoco Production, L.P.Jul 2018 → May 2020
- 10Shoco Production LLCJun 2020 → Mar 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 280459-99 | Drill | Exxon Corp. | Jun 20, 1985 | Jul 18, 1985 | Aug 23, 1985 | 9,070 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-4-3390 | — | — | — | — |
| — | — O-4-14076 | — | — | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,875 | 7,948 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 1,633 | 12.25 | 1,115 S |
| 5.5 | 8,070 | 7.875 | 625 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 20, 2018 | Apr 30, 1986 | Yes |
| 00 | May 14, 1986 | Apr 30, 1986 | Yes |
| 00 | May 7, 1986 | — | — |
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 42-489-30877 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-489-30877 → 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/48930877, documented in the API reference.