WELL · 42-489-30825 · DISTRICT 4
Sauz Ranch Mulatos Past. #181
Willacy County · Willamar West (Miocene 6050 N) field · Vertical
Sauz Ranch Mulatos Past. #181 (API 42-489-30825) is a well in Willacy County operated by Chestnut Explor. And Prod. Inc., completed October 7, 1986.
The RRC has issued 2 drilling permits between 1984 and 1986, permitted to 6,800 ft.
It was permitted by Exxon Corp. and has since transferred to Chestnut Explor. And Prod. Inc. on the wellbore schedule.
Its lease has reported 6.25K barrels of oil and 5.8K mcf of gas since January 1993, last reporting in July 2026. The lease carries 4 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 | Prize Operating Companythrough Mar 2000 |
| Latest permit | Exxon Corp.Mar 12, 1986 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 6,800
- total depth, ft
- 2
- permits on file
- Mar 12, 1986
- last permit issued
- Oct 7, 1986
- completed
- 6.25K
- cumulative oil, bbl
- 5.8K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Oct 7, 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 lease this well is completed on; they carry 4 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Sauz Ranch Mulatos Past. O-4-10529 | Willamar, West (Miocene 6050,N) | Chestnut Explor. and Prod., Inc. | 4 | 6.25K | 5.8K | Jan 1993 – Jul 2026 |
No volumes reported on these leases in the last three years.
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Parker & Parsley Development L.PJul 1997 → Aug 1997
- 2Pioneer Natural Res. USA, Inc.Sep 1997 → Jun 1999
- 3Prize Operating CompanyJul 1999 → Mar 2000
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 299417-99 | Recompletion | Exxon Corp. | Mar 7, 1986 | Mar 12, 1986 | — | 6,800 |
| 246170-99 | Drill | Exxon Corp. | Mar 12, 1985 | Jul 24, 1984 | Jul 30, 1984 | 6,800 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-4-10529 | — | — | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 4,578 | 4,586 | Perforated |
| 5,874 | 5,880 | Perforated |
| 6,064 | 6,070 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 1,572 | 12.5 | 700 S |
| 2.875 | 6,400 | 7.875 | 1,114 S |
| 2.875 | 6,402 | — | — |
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 6, 1996 | Feb 11, 1988 | — |
| 00 | Aug 4, 1988 | Feb 11, 1988 | — |
| 00 | Mar 18, 1988 | Jan 13, 1987 | Yes |
| 00 | Feb 2, 1987 | Jan 13, 1987 | Yes |
| 00 | Apr 22, 1985 | Mar 9, 1985 | — |
| 00 | Apr 18, 1985 | Mar 9, 1985 | — |
| 00 | Apr 10, 1985 | — | — |
| 00 | Mar 21, 1985 | — | — |
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 42-489-30825 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-489-30825 → 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/48930825, documented in the API reference.