TEXAS · WELLS · ATASCOSA COUNTY · CHAPMAN PFEIL UNIT LEASE · API 42-013-34339 · DISTRICT 01
Chapman Pfeil Unit #1H
Atascosa County · Eagleville (Eagle Ford-1) field · Producing · Horizontal
Chapman Pfeil Unit #1H (API 42-013-34339) is a horizontal well in Atascosa County operated by Marathon Oil EF LLC, completed May 13, 2011 and listed as producing on the RRC schedule, shut in June 1, 2024.
The RRC has issued one drilling permit, issued February 7, 2011, permitted to 10,595 ft.
It was permitted by Hilcorp Energy Company and has since transferred to Marathon Oil EF LLC on the wellbore schedule.
Completion filings report 4 formation tops, including Anacacho, Austin Chalk, Eagle Ford, Buda.
Its lease has reported 534K barrels of oil and 784K mcf of gas since May 2011, last reporting in July 2026. The lease carries 3 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Hilcorp Energy Company; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active (A)
- P-5 last filed
- Sep 26, 2025
- Permits on file
- 3,191
- Phone
- (832) 486-2737
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Marathon Oil EF LLC |
| Production reports | Marathon Oil EF LLCthrough Jul 2025 |
| Latest permit | Hilcorp Energy CompanyFeb 7, 2011 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,595
- total depth, ft
- 1
- permits on file
- Feb 7, 2011
- last permit issued
- May 13, 2011
- completed
- 534K
- cumulative oil, bbl
- 784K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · May 2011 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- May 13, 2011
- Shut in
- Jun 1, 2024
- Plugged
- —
Operator's P-5 on the schedule: Active – Extension (X)
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 3 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Chapman Pfeil Unit O-1-15659 | Eagleville (Eagle Ford-1) | Marathon Oil EF LLC | 3 | 534K | 784K | May 2011 – Jul 2026 |
Oil, barrels lease total
Last 12 months 406 · prior 12 374(+9%)
Gas, mcf lease total
Last 12 months 217 · prior 12 39(+456%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Hilcorp Energy CompanyMay 2011 → Oct 2011
- 2Marathon Oil EF LLCNov 2011 → Jul 2025
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 709520-99 | Drill | Hilcorp Energy Company | Jan 31, 2011 | Feb 7, 2011 | Feb 21, 2011 | 13,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| May 13, 2011 | Chapman Pfeil Unit O-1-15659 | Eagleville (Eagle Ford-1) | Marathon Oil EF LLC | Producing · shut in Jun 1, 2024 | 10,595 |
Formation tops
As filed on W-2/G-1. Subsea from 417 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Anacacho | 10,379 | -9,962 |
| Austin Chalk | 10,535 | -10,118 |
| Eagle Ford | 10,723 | -10,306 |
| Buda | 10,860 | -10,443 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 10,860 | 15,141 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 5,127 | 13.5 | 2,180 S |
| 5.5 | 15,239 | 8.5 | 1,945 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 28, 2012 | Nov 20, 2011 | 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 42-013-34339 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-013-34339 → 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/01334339, documented in the API reference.