TEXAS · WELLS · TARRANT COUNTY · TADLOCK, MARGARET LEASE · API 42-439-31054 · DISTRICT 7C
Tadlock Margaret #4
Tarrant County · Newark East (Barnett Shale) field · Producing · Directional
Tadlock Margaret #4 (API 42-439-31054) is a well in Tarrant County operated by Bkv Barnett LLC, completed July 4, 2015 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued November 15, 2004, permitted to 7,665 ft.
It was permitted by Devon Energy Production CO, L.P. and has since transferred to Bkv Barnett LLC on the wellbore schedule.
Completion filings report 3 formation tops, including Marble Falls, Barnett, Ordovician.
Its lease has reported 1.56M mcf of gas since June 2005, last reporting volume in August 2026.
Operator of record
Permitted by Devon Energy Production Co, L.P.; the EWA schedule now lists a different operator.
- Based in
- Fort Worth, TX
- P-5 status
- Active (A)
- P-5 last filed
- Mar 11, 2026
- Permits on file
- 143
- Phone
- (940) 394-2000
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | BKV Barnett LLC |
| Production reports | BKV Barnett, LLCthrough Aug 2026 |
| Latest permit | Devon Energy Production Co, L.P.Nov 15, 2004 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 7,665
- total depth, ft
- 2
- permits on file
- Nov 15, 2004
- last permit issued
- Jul 4, 2015
- completed
- 0
- cumulative oil, bbl
- 1.56M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · JUN 2005 THROUGH AUG 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jul 4, 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.
Wells nearby
Every well with a location on file around this well, in any state, nearest first.
Texas locations come from drilling permits, so most older Texas wells have none and are not listed.
Lease production
PDQ LEASE REPORTS · REPORTED THROUGH AUG 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 |
|---|---|---|---|---|---|---|
| Tadlock, Margaret G-13-211458 | Newark, East (Barnett Shale) | BKV Barnett, LLC | 1 | 0 | 1.56M | Jun 2005 – Aug 2026 |
Gas, mcf lease total
Last 12 months 38,695 · prior 12 43,709(-11%)
Wells named Tadlock Margaret
BKV Barnett LLC's other wells filed under this lease name in Tarrant County, newest permit first. The RRC gives a gas well its own lease number, so the name is what joins the wells of a unit.
Loading the lease's wellsChain of custody
Every operator that reported production on this well's lease, in order.
- 1Devon Energy Production Co, L.P.Jun 2005 → Sep 2020
- 2BKV Barnett, LLCOct 2020 → Aug 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 553614-98 | Drill | Devon Energy Production Co, L.P. | Mar 23, 2005 | Nov 15, 2004 | Mar 27, 2005 | 9,000 |
| 553614-99 | Drill | Devon Energy Production Co, L.P. | Nov 15, 2004 | Nov 15, 2004 | — | 9,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jul 4, 2015 | Tadlock Margaret G-13-211458 | Newark East (Barnett Shale) | BKV Barnett LLC | Producing | 7,665 |
Formation tops
As filed on W-2/G-1. Subsea from 813 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Marble Falls | 6,870 | -6,057 |
| BarnettBARNETT SHALE | 7,140 | -6,327 |
| BarnettBARNETT SHALE | 7,146 | -6,333 |
| Ordovician | 7,504 | -6,691 |
| Ordovician | 7,506 | -6,693 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,178 | 7,326 | Perforated |
| 7,178 | 7,405 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 1,272 | 13.5 | 800 S |
| 5.5 | 7,665 | 8.75 | 560 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. The record date is the RRC's own date on the record, not the day the report was filed: 462,034 of the state's filings carry 1984-01-12. About these reports →
| Suffix | RRC record date | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Sep 24, 2015 | Jul 21, 2015 | — |
| 00 | Mar 5, 2007 | Oct 10, 2006 | — |
| 00 | Dec 19, 2005 | Sep 22, 2005 | Yes |
| 00 | Oct 13, 2005 | — | — |
Well logs
1 log loaded from the RRC's log index, the latest received Nov 9, 2009. Resistivity. These are the logs loaded into Petrora from the Railroad Commission's inventories, not necessarily every log run on the well. The RRC holds the files; each opens from its log search for the well. The kind is the RRC's description of the log; the interval is the one filed for it.
Open the RRC's log search for this well ↗| Logas described | Files | Intervalft, as filed | Datereceived | SizeMB |
|---|---|---|---|---|
| RESISTIVITYSpans Marble Falls, Barnett, Ordovician | TIFF | 1,270 to 7,676 | Nov 9, 2009run Apr 10, 2005 | 2.55 |
"Spans" is by this well's own filed formation tops: a formation runs from its top to the next deeper top filed, and the deepest runs to the bottom of the log. Depths are measured along the wellbore, so on a horizontal the lateral counts in the formation it was landed in.
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 42-439-31054 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-439-31054 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search for it.
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/43931054, documented in the API reference.