WELL · 42-127-37196 · DISTRICT 1
Big Wells South Unit 12 Dim #A 3H
Dimmit County · Briscoe Ranch (Eagleford) field · Producing · Horizontal
Big Wells South Unit 12 Dim #A 3H (API 42-127-37196) is a horizontal well in Dimmit County operated by Ineos USA Oil & Gas LLC, completed December 16, 2016 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued September 17, 2015, permitted to 7,174 ft.
It was permitted by Chesapeake Operating, L.L.C. and has since transferred to Ineos USA Oil & Gas LLC on the wellbore schedule.
Completion filings report 9 formation tops, including Escondido, Olmos, San Miguel, Austin Chalk.
Its lease has reported 591K barrels of oil and 832K mcf of gas since March 2016, last reporting in July 2026. The lease carries 2 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Chesapeake Operating, L.L.C.; the EWA schedule now lists a different operator.
- Based in
- Denver, CO
- P-5 status
- Active – Extension (X)
- P-5 last filed
- May 26, 2026
- Permits on file
- 98
- Phone
- (720) 764-3473
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Ineos USA Oil & Gas LLC |
| Production reports | Ineos USA Oil & Gas LLCthrough Apr 2026 |
| Latest permit | Chesapeake Operating, L.L.C.Sep 17, 2015 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 7,174
- total depth, ft
- 1
- permits on file
- Sep 17, 2015
- last permit issued
- Dec 16, 2016
- completed
- 591K
- cumulative oil, bbl
- 832K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Mar 2016 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Dec 16, 2016
- 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; they carry 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Big Wells South Unit 12 Dim O-1-18746 | Briscoe Ranch (Eagleford) | Ineos USA Oil & Gas LLC | 2 | 591K | 832K | Mar 2016 – Jul 2026 |
Oil, barrels lease total
Last 12 months 8,967 · prior 12 14,086(-36%)
Gas, mcf lease total
Last 12 months 94,036 · prior 12 57,824(+63%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Chesapeake Operating, L.L.C.Mar 2016 → Mar 2023
- 2Ineos USA Oil & Gas LLCApr 2023 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 810134-99 | Drill | Chesapeake Operating, L.L.C. | Sep 8, 2015 | Sep 17, 2015 | Nov 25, 2015 | 9,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Dec 16, 2016 | Big Wells South Unit 12 Dim O-1-18746 | Briscoe Ranch (Eagleford) | Ineos USA Oil & Gas LLC | Producing | 7,174 |
Formation tops
As filed on W-2/G-1. Subsea from 453 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| EscondidoESCONDIDO - DISPOSAL | 3,509 | -3,056 |
| OlmosOLMOS - DISPOSAL | 4,589 | -4,136 |
| San MiguelSAN MIGUEL - H2S | 5,525 | -5,072 |
| Austin ChalkAUSTIN CHALK - H2S | 6,641 | -6,188 |
| Eagle FordEAGLE FORD - H2S | 7,116 | -6,663 |
| EdwardsEDWARDS - H2S | — | — |
| GeorgetownGEORGETOWN - H2S | — | — |
| Glen RoseGLEN ROSE - DISPOSAL | — | — |
| Pearsall | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,517 | 14,814 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 2,222 | 12.25 | 695 S |
| 5.5 | 14,841 | 8.5 | 2,655 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 | Jan 10, 2017 | Jan 6, 2017 | — |
| 00 | Apr 28, 2016 | Apr 21, 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 42-127-37196 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-127-37196 → 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/12737196, documented in the API reference.