WELL · 42-255-38136 · DISTRICT 2
Mary #4H
Karnes County · Eagleville (Eagle Ford-2) field · Producing · Horizontal
Mary #4H (API 42-255-38136) is a horizontal well in Karnes County operated by Magnolia Oil & Gas Operating LLC, completed January 28, 2025 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued September 17, 2024, permitted to 12,000 ft.
It was permitted by 1776 Energy Operators, LLC and has since transferred to Magnolia Oil & Gas Operating LLC on the wellbore schedule.
Completion filings report 10 formation tops, including Austin Chalk, Eagle Ford, Carrizo, Edwards.
Its lease has reported 747K barrels of oil and 2M mcf of gas since December 2010, last reporting in July 2026. The lease carries 4 wells, so these are lease totals, not this well alone.
Operator of record
Magnolia Oil & Gas Operating LLC
Permitted by 1776 Energy Operators, LLC; the EWA schedule now lists a different operator.
Houston, TX · P-5 Y, filed Mar 4, 2026 · 615 permits on file · (713) 345-6206
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Magnolia Oil & Gas Operating LLC |
| Production reports | Magnolia Oil & Gas Operating LLCthrough Apr 2026 |
| Latest permit | 1776 Energy Operators, LLCSep 17, 2024 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 12,000
- total depth, ft
- 1
- permits on file
- Sep 17, 2024
- last permit issued
- Jan 28, 2025
- completed
- 747K
- cumulative oil, bbl
- 2M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Dec 2010 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jan 28, 2025
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: X
Surface location
29.130540, -97.676382
OpenStreetMap → · Google Maps →
Permit surface location from the RRC GIS record, in Karnes County.
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 4 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Mary O-2-9668 | Eagleville (Eagle Ford-2) | Magnolia Oil & Gas Operating LLC | 4 | 747K | 2M | Dec 2010 – Jul 2026 |
Oil, barrels lease total
Last 12 months 114,348 · prior 12 131,481(-13%)
Gas, mcf lease total
Last 12 months 1,037,587 · prior 12 346,429(+200%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Riley Exploration, LLCDec 2010 → Jun 2013
- 21776 Energy Operators, LLCJul 2013 → Oct 2025
- 3Silver Hill Energy Operating LLCNov 2025 → Feb 2026
- 4Magnolia Oil & Gas Operating LLCMar 2026 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 902608-99 | Drill | 1776 Energy Operators, LLC | Sep 11, 2024 | Sep 17, 2024 | Oct 25, 2024 | 12,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-2-9668 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 455 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Austin ChalkAUSTIN CHALK - H2S | 10,848 | -10,393 |
| Eagle FordEAGLE FORD - H2S | 11,295 | -10,840 |
| Carrizo | — | — |
| EdwardsEDWARDS - H2S | — | — |
| FrioFRIO - DISPOSAL | — | — |
| Queen City | — | — |
| Reklaw | — | — |
| SligoSLIGO - H2S | — | — |
| WilcoxWILCOX - DISPOSAL | — | — |
| YeguaYEGUA - DISPOSAL | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 11,855 | 16,220 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 4,730 | 12.25 | 1,276 S |
| 5.5 | 16,268 | 8.75 | 2,622 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 | Apr 24, 2025 | Mar 6, 2025 | 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 42-255-38136 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-255-38136 → 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.
Nearby wells and their tops
NEAREST 8 LOCATED WELLS WITH TOPS · WITHIN 16 KM
Draw a cross-section
This well's tops beside its 5 nearest neighbours, subsea-aligned so they line up regardless of surface terrain.
Mary42-255-38135
0.0 KM · 1776 Energy Operators, LLC · Section with this well →
| Austin Chalk | 10,830 | -10,376 |
| Eagle Ford | 11,296 | -10,842 |
| Edwards | — | |
| Frio | — | |
| Queen City | — | |
| Reklaw | — | |
| Sligo | — | |
| Yegua | — |
10 TOPS · FIRST 8
Simmons Unit42-255-36014
0.6 KM · EOG Resources, Inc. · Section with this well →
| Frio | 500 | -62 |
| Yegua | 1,251 | -813 |
| Queen City | 2,672 | -2,234 |
| Reklaw | 3,136 | -2,698 |
| Carrizo | 3,543 | -3,105 |
| Wilcox | 3,779 | -3,341 |
| Anacacho | 10,466 | -10,028 |
| Austin Chalk | 10,862 | -10,424 |
11 TOPS · FIRST 8
Simmons Unit42-255-36015
0.6 KM · EOG Resources, Inc. · Section with this well →
| Frio | 500 | -62 |
| Yegua | 1,251 | -813 |
| Queen City | 2,672 | -2,234 |
| Reklaw | 3,136 | -2,698 |
| Carrizo | 3,543 | -3,105 |
| Wilcox | 3,779 | -3,341 |
| Austin Chalk | 10,849 | -10,411 |
| Eagle Ford | 11,279 | -10,841 |
10 TOPS · FIRST 8
Simmons Unit42-255-36016
0.6 KM · EOG Resources, Inc. · Section with this well →
| Frio | 500 | -62 |
| Yegua | 1,251 | -813 |
| Queen City | 2,672 | -2,234 |
| Reklaw | 3,136 | -2,698 |
| Carrizo | 3,543 | -3,105 |
| Wilcox | 3,779 | -3,341 |
| Anacacho | 10,448 | -10,010 |
| Austin Chalk | 10,847 | -10,409 |
11 TOPS · FIRST 8
Simmons Unit42-255-36018
0.6 KM · EOG Resources, Inc. · Section with this well →
| Frio | 500 | -62 |
| Yegua | 1,251 | -813 |
| Queen City | 2,672 | -2,234 |
| Reklaw | 3,136 | -2,698 |
| Carrizo | 3,543 | -3,105 |
| Wilcox | 3,779 | -3,341 |
| Anacacho | 10,431 | -9,993 |
| Austin Chalk | 10,825 | -10,387 |
11 TOPS · FIRST 8
McCartney Unit42-255-36324
0.9 KM · EOG Resources, Inc. · Section with this well →
| Queen City | 2,758 | -2,738 |
| Reklaw | 3,153 | -3,133 |
| Wilcox | 3,864 | -3,844 |
| Carrizo | 3,917 | -3,897 |
| Austin Chalk | 10,853 | -10,833 |
| Eagle Ford | 11,348 | -11,328 |
| Frio | — | |
| Yegua | — |
10 TOPS · FIRST 8
McCartney Unit42-255-36323
0.9 KM · EOG Resources, Inc. · Section with this well →
| Queen City | 2,758 | -2,338 |
| Reklaw | 3,153 | -2,733 |
| Wilcox | 3,864 | -3,444 |
| Carrizo | 3,917 | -3,497 |
| Anacacho | 10,509 | -10,089 |
| Austin Chalk | 10,859 | -10,439 |
| Eagle Ford | 11,345 | -10,925 |
| Yegua | — |
10 TOPS · FIRST 8
McCartney Unit42-255-36320
0.9 KM · EOG Resources, Inc. · Section with this well →
| Queen City | 2,758 | -2,338 |
| Reklaw | 3,153 | -2,733 |
| Wilcox | 3,864 | -3,444 |
| Carrizo | 3,917 | -3,497 |
| Anacacho | 10,509 | -10,089 |
| Austin Chalk | 10,850 | -10,430 |
| Eagle Ford | 11,350 | -10,930 |
| Frio | — |
10 TOPS · FIRST 8
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/25538136, documented in the API reference.