WELL · 42-311-33477 · DISTRICT 1
ZR Unit D #8
McMullen County · A.W.P. (Olmos) field · Vertical
ZR Unit D #8 (API 42-311-33477) is a well in Mcmullen County operated by Swift Energy Company, completed December 15, 1997.
The RRC has issued one drilling permit, issued October 31, 1997, permitted to 11,000 ft.
Completion filings report 9 formation tops, including Sparta, Queen City, Carrizo, Wilcox.
Its 2 leases have reported 72.6K barrels of oil and 433K mcf of gas since December 1997, last reporting in July 2026. The leases carry 3 wells, so these are lease totals, not this well alone.
Operator of record
Houston, TX · P-5 Y, filed Jul 7, 2006 · 719 permits on file
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Swift Energy Company |
| Production reports | Varas Energy Operating Company,through Apr 2026 |
| Latest permit | Swift Energy CompanyOct 31, 1997 |
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
- 1
- permits on file
- Oct 31, 1997
- last permit issued
- Dec 15, 1997
- completed
- 72.6K
- cumulative oil, bbl
- 433K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Dec 1997 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Dec 15, 1997
- 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 3 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| ZR Unit "D" O-1-14217 | A.W.P. (Olmos) | Varas Energy Operating Company, | 2 | 72.6K | 413K | Sep 1998 – Jul 2026 |
| ZR Unit "D" G-1-166645 | A.W.P. (Olmos) | Swift Energy Company | 1 | 0 | 19.6K | Dec 1997 – Nov 1998 |
Oil, barrels lease total
Last 12 months 664 · prior 12 785(-15%)
Gas, mcf lease total
Last 12 months 3,657 · prior 12 3,444(+6%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Swift Energy CompanyDec 1997 → Dec 2005
- 2Swift Energy Operating, LLCJan 2006 → Jun 2017
- 3Silverbow Resources Oper, LLCJul 2017 → Nov 2017
- 4EL Dorado Gas & Oil, Inc.Feb 2018 → Dec 2024
- 5Varas Energy Operating Company,Jan 2025 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 469542-99 | Drill | Swift Energy Company | Oct 31, 1997 | Oct 31, 1997 | Nov 21, 1997 | 11,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-1-166645 | — | — | — | — |
| — | — O-1-14217 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 303 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 10,320 | 10,326 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 7.625 | 1,130 | 9.875 | 279 S |
| 3.5 | 10,608 | 6.5 | 1,480 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 | Oct 2, 1998 | Sep 14, 1998 | — |
| 00 | Sep 24, 1998 | — | — |
| 00 | Jul 24, 1998 | Jul 3, 1998 | — |
| 00 | Mar 4, 1998 | Feb 9, 1998 | Yes |
| 00 | Feb 27, 1998 | — | — |
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 42-311-33477 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-311-33477 → 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/31133477, documented in the API reference.