WELL · 42-173-31702 · DISTRICT 8
Blalock #4
Glasscock County · Dewey Lake (Wolfcamp) field · Vertical
Blalock #4 (API 42-173-31702) is a well in Glasscock County operated by Royalty Land & Dev. CO. Inc., completed October 24, 1984.
The RRC has issued one drilling permit, issued September 21, 1984, permitted to 8,550 ft.
It was permitted by Chapman Exploration, Inc. and has since transferred to Royalty Land & Dev. CO. Inc. on the wellbore schedule.
Completion filings report 3 formation tops, including Clear Fork, Spraberry, Wolfcamp.
Its 2 leases have reported 195K barrels of oil and 395K mcf of gas since January 1993, last reporting in July 2026. The leases carry 8 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Chapman Exploration, Inc.; the EWA schedule now lists a different operator.
Wolfforth, TX · P-5 Y, filed Oct 4, 2025 · 32 permits on file · (806) 789-7727
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Royalty Land & Dev. Co. Inc. |
| Production reports | Royalty Land & Dev. Co., Inc.through Apr 2026 |
| Latest permit | Chapman Exploration, Inc.Sep 21, 1984 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,550
- total depth, ft
- 1
- permits on file
- Sep 21, 1984
- last permit issued
- Oct 24, 1984
- completed
- 195K
- cumulative oil, bbl
- 395K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Oct 24, 1984
- 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 8 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Blalock O-10-52058 | Spraberry (Trend Area) | Royalty Land & Dev. Co., Inc. | 3 | 11.8K | 0 | Sep 2019 – Jul 2026 |
| Blalock O-10-28869 | Dewey Lake (Wolfcamp) | Royalty Land & Dev. Co., Inc. | 5 | 183K | 395K | Jan 1993 – Nov 2019 |
Oil, barrels lease total
Last 12 months 478 · prior 12 1,214(-61%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Farmers of Tulsa Energy Corp.Jan 1993 → Oct 1995
- 2Royalty Land & Dev. Co., Inc.Nov 1995 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 252153-99 | Drill | Chapman Exploration, Inc. | Sep 20, 1984 | Sep 21, 1984 | Oct 2, 1984 | 8,550 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-28869 | — | — | — | — |
| — | — O-10-52058 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,526 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Clear ForkCLEARFORK | 5,000 | -2,474 |
| Spraberry | 6,000 | -3,474 |
| Wolfcamp | 8,250 | -5,724 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,327 | 8,338 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 311 | 17.25 | 300 S |
| 8.625 | 3,296 | 11 | 875 S |
| 5.5 | 8,499 | 7.875 | 300 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 | Sep 11, 2019 | Oct 31, 1984 | — |
| 00 | Nov 12, 1984 | Oct 31, 1984 | — |
| 00 | Nov 8, 1984 | — | — |
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 42-173-31702 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-173-31702 → 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/17331702, documented in the API reference.