TEXAS · WELLS · HEMPHILL COUNTY · FILLINGIM 88 LEASE · API 42-211-35475 · DISTRICT 08
Fillingim 88 #18H
Hemphill County · Buffalo Wallow (Granite Wash) field · Producing · Horizontal
Fillingim 88 #18H (API 42-211-35475) is a horizontal well in Hemphill County operated by Unbridled Resources LLC, completed November 19, 2015 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued February 10, 2015, permitted to 11,197 ft.
It was permitted by Enervest Operating, L.L.C. and has since transferred to Unbridled Resources LLC on the wellbore schedule.
Completion filings report 9 formation tops, including Topeka, Brownsville, Pennsylvanian, Brown Dolomite.
No lease production has been reported under this well’s leases.
Operator of record
Permitted by Enervest Operating, L.L.C.; the EWA schedule now lists a different operator.
- Based in
- Oklahoma City, OK
- P-5 status
- Active (A)
- P-5 last filed
- Dec 17, 2025
- Permits on file
- 6
- Phone
- (318) 751-3917
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Unbridled Resources LLC |
| Production reports | Unbridled Resources, LLCthrough Apr 2026 |
| Latest permit | Enervest Operating, L.L.C.Feb 10, 2015 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 11,197
- total depth, ft
- 2
- permits on file
- Feb 10, 2015
- last permit issued
- Nov 19, 2015
- completed
- 0
- cumulative oil, bbl
- 2.29M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Nov 2015 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Nov 19, 2015
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Fillingim 88 G-14-280997 | Buffalo Wallow (Granite Wash) | Unbridled Resources, LLC | 1 | 0 | 2.29M | Nov 2015 – Jul 2026 |
Gas, mcf lease total
Last 12 months 4,291 · prior 12 19,416(-78%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Enervest Operating, L.L.C.Nov 2015 → Mar 2018
- 24P Energy Texas, LLCApr 2018 → Oct 2020
- 3Unbridled Resources, LLCNov 2020 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 803482-98 | Drill | Enervest Operating, L.L.C. | Mar 17, 2015 | Feb 10, 2015 | Mar 6, 2015 | 16,300 |
| 803482-99 | Drill | Enervest Operating, L.L.C. | Feb 3, 2015 | Feb 10, 2015 | Mar 6, 2015 | 16,300 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Nov 19, 2015 | Fillingim 88 G-14-280997 | Buffalo Wallow (Granite Wash) | Unbridled Resources LLC | Producing | 11,197 |
Formation tops
As filed on W-2/G-1. Subsea from 2,644 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Topeka | 5,830 | -3,186 |
| Brownsville | 6,080 | -3,436 |
| PennsylvanianPENNSYLVANIAN SAND | 7,120 | -4,476 |
| Brown DolomiteBROWN DOLOMITE - PROD, PRESSURED | 8,037 | -5,393 |
| Douglas | 8,312 | -5,668 |
| Tonkawa | 8,848 | -6,204 |
| Kansas CityKANSAS CITY (HOGSHOOTER) | 9,789 | -7,145 |
| OswegoOSWEGO UPPER | 9,930 | -7,286 |
| Cleveland | 9,939 | -7,295 |
| PennsylvanianPENNSYLVANIAN (MARMATON) | 10,707 | -8,063 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 11,439 | 15,615 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 610 | 12.25 | 340 S |
| 7 | 11,352 | 8.75 | 820 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 18, 2016 | Jan 4, 2016 | Yes |
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 42-211-35475 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-211-35475 → 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/21135475, documented in the API reference.