WELL · 42-477-31207 · DISTRICT 3
Zion Grotto #H 12ZN
Washington County · Giddings (Austin Chalk-3) field · Horizontal
Zion Grotto #H 12ZN (API 42-477-31207) is a horizontal well in Washington County operated by Magnolia Oil & Gas Operating LLC, completed November 29, 2022.
The RRC has issued one drilling permit (amended once), issued April 22, 2022, permitted to 14,500 ft.
Completion filings report 9 formation tops, including Wilcox, Midway, Navarro, Tyler.
No lease production has been reported under this well’s leases.
Operator of record
Magnolia Oil & Gas Operating LLC
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 | Magnolia Oil & Gas Operating LLCApr 22, 2022 |
- 14,500
- total depth, ft
- 2
- permits on file
- Apr 22, 2022
- last permit issued
- Nov 29, 2022
- completed
- 0
- cumulative oil, bbl
- 1.32M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Nov 2022 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Nov 29, 2022
- Shut in
- —
- Plugged
- —
Surface location
30.161496, -96.759152
OpenStreetMap → · Google Maps →
Permit surface location from the RRC GIS record, in Washington County.
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 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Zion Grotto G-3-300242 | Giddings (Austin Chalk-3) | Magnolia Oil & Gas Operating LLC | 1 | 0 | 1.32M | Nov 2022 – Jul 2026 |
| Zion Grotto O-3-28091 | Giddings (Austin Chalk-3) | Magnolia Oil & Gas Operating LLC | 1 | 0 | 0 | Nov 2022 – Mar 2026 |
Gas, mcf lease total
Last 12 months 158,168 · prior 12 389,162(-59%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Magnolia Oil & Gas Operating LLCNov 2022 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 879153-98 | Drill | Magnolia Oil & Gas Operating LLC | Mar 8, 2024 | Apr 22, 2022 | May 1, 2022 | 14,500 |
| 879153-99 | Drill | Magnolia Oil & Gas Operating LLC | Apr 15, 2022 | Apr 22, 2022 | May 1, 2022 | 14,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-3-300242 | — | — | — | — |
| — | — O-3-28091 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 371 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Wilcox | 2,973 | -2,602 |
| WilcoxWILCOX - DISPOSAL | 2,974 | -2,603 |
| Midway | 6,666 | -6,295 |
| Navarro | 7,772 | -7,401 |
| Tyler | 7,772 | -7,401 |
| Navarro | 7,773 | -7,402 |
| Nevarro | 8,330 | -7,959 |
| Pecan Gap | 8,330 | -7,959 |
| TaylorTAYLOR GROUP | 8,330 | -7,959 |
| Tyler | 8,330 | -7,959 |
| Austin Chalk | 9,258 | -8,887 |
| Pecan Gap | 9,258 | -8,887 |
| Austin Chalk | 9,822 | -9,451 |
| Austin Chalk | 9,823 | -9,452 |
| CaprockCAPROCK - DISPOSAL | — | — |
| WilcoxWILCOX - DISPOSAL | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 10,780 | 20,681 | Perforated |
| 10,808 | 20,709 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 2,762 | 13.5 | 1,370 S |
| 5.5 | 9,538 | 6.75 | 2,550 S |
| 7.625 | 10,110 | 9.875 | 1,205 S |
| 5.5 | 20,850 | 6.75 | 2,550 S |
| 5 | 20,850 | 6.75 | 2,550 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 | Mar 30, 2026 | Jan 20, 2026 | — |
| 00 | Nov 3, 2025 | Nov 21, 2024 | Yes |
| 00 | Apr 4, 2024 | Jan 8, 2024 | Yes |
| 00 | Dec 1, 2023 | Jun 20, 2023 | 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 42-477-31207 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-477-31207 → 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.
Riverside Walk42-477-31201
0.0 KM · Magnolia Oil & Gas Operating LLC · Section with this well →
| Wilcox | 2,965 | -2,594 |
| Midway | 6,623 | -6,252 |
| Nevarro | 7,706 | -7,335 |
| Navarro | 7,706 | -7,335 |
| Tyler | 8,257 | -7,886 |
| Pecan Gap | 9,139 | -8,768 |
| Austin Chalk | 9,743 | -9,372 |
| Wilcox | — |
9 TOPS · FIRST 8
Zion Lodge42-477-31202
0.0 KM · Magnolia Oil & Gas Operating LLC · Section with this well →
| Wilcox | 2,984 | -2,613 |
| Wilcox | 2,984 | -2,613 |
| Midway | 6,673 | -6,302 |
| Navarro | 7,761 | -7,390 |
| Nevarro | 7,761 | -7,390 |
| Taylor | 8,326 | -7,955 |
| Tyler | 8,326 | -7,955 |
| Pecan Gap | 9,219 | -8,848 |
10 TOPS · FIRST 8
Zion Angels42-477-31204
0.0 KM · Magnolia Oil & Gas Operating LLC · Section with this well →
| Wilcox | 2,925 | -2,555 |
| Midway | 6,656 | -6,286 |
| Navarro | 7,739 | -7,369 |
| Tyler | 8,289 | -7,919 |
| Pecan Gap | 9,194 | -8,824 |
| Austin Chalk | 9,805 | -9,435 |
| Wilcox | — | |
| Caprock | — |
Zion Emerald42-477-31206
0.0 KM · Magnolia Oil & Gas Operating LLC · Section with this well →
| Wilcox | 2,952 | -2,582 |
| Wilcox | 2,952 | -2,582 |
| Midway | 6,686 | -6,316 |
| Navarro | 7,768 | -7,398 |
| Nevarro | 7,768 | -7,398 |
| Tyler | 8,314 | -7,944 |
| Taylor | 8,315 | -7,945 |
| Pecan Gap | 9,203 | -8,833 |
10 TOPS · FIRST 8
Zion Canyon42-477-31200
0.0 KM · Magnolia Oil & Gas Operating LLC · Section with this well →
| Wilcox | 2,941 | -2,571 |
| Midway | 6,637 | -6,267 |
| Nevarro | 7,714 | -7,344 |
| Navarro | 7,714 | -7,344 |
| Tyler | 8,257 | -7,887 |
| Pecan Gap | 9,211 | -8,841 |
| Austin Chalk | 9,758 | -9,388 |
| Wilcox | — |
9 TOPS · FIRST 8
Zion River42-477-31203
0.0 KM · Magnolia Oil & Gas Operating LLC · Section with this well →
| Wilcox | 2,986 | -2,615 |
| Midway | 6,698 | -6,327 |
| Navarro | 7,792 | -7,421 |
| Nevarro | 7,792 | -7,421 |
| Tyler | 8,350 | -7,979 |
| Pecan Gap | 9,237 | -8,866 |
| Austin Chalk | 9,966 | -9,595 |
| Wilcox | — |
9 TOPS · FIRST 8
Zion Narrows42-477-31205
0.0 KM · Magnolia Oil & Gas Operating LLC · Section with this well →
| Wilcox | 2,988 | -2,618 |
| Wilcox | 2,988 | -2,618 |
| Midway | 6,717 | -6,347 |
| Navarro | 7,805 | -7,435 |
| Nevarro | 7,805 | -7,435 |
| Tyler | 8,339 | -7,969 |
| Pecan Gap | 9,250 | -8,880 |
| Austin Chalk | 9,877 | -9,507 |
9 TOPS · FIRST 8
Yellowstone42-477-31130
0.8 KM · Magnolia Oil & Gas Operating LLC · Section with this well →
| Wilcox | 3,096 | -2,720 |
| Navarro | 7,800 | -7,424 |
| Pecan Gap | 9,249 | -8,873 |
| Austin Chalk | 9,885 | -9,509 |
| Caprock | — |
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/47731207, documented in the API reference.