TEXAS · WELLS · ZAPATA COUNTY · MARIA CUELLAR LEASE · API 42-505-35582 · DISTRICT 04
Maria Cuellar #18
Zapata County · Cisco-Benavides (Lobo Cons.) field · Producing · Vertical
Maria Cuellar #18 (API 42-505-35582) is a well in Zapata County operated by Hilcorp Energy Company, completed June 19, 2008 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued May 11, 2006, permitted to 9,600 ft.
It was permitted by Houston Exploration Company, The and has since transferred to Hilcorp Energy Company on the wellbore schedule.
Completion filings report 3 formation tops, including Lobo 2, Lobo 3, Lobo 6.
Its lease has reported 158 barrels of oil and 1.37M mcf of gas since June 2006, last reporting volume in April 2026.
Operator of record
Permitted by Houston Exploration Company, The; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- Mar 27, 2026
- Permits on file
- 3,458
- Phone
- (713) 209-2400
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Hilcorp Energy Company |
| Production reports | Hilcorp Energy Companythrough Apr 2026 |
| Latest permit | Houston Exploration Company, TheMay 11, 2006 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,600
- total depth, ft
- 1
- permits on file
- May 11, 2006
- last permit issued
- Jun 19, 2008
- completed
- 158
- cumulative oil, bbl
- 1.37M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jun 2006 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jun 19, 2008
- 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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Maria Cuellar G-4-221580 | Cisco-Benavides (Lobo Cons.) | Hilcorp Energy Company | 1 | 158 | 1.37M | Jun 2006 – Apr 2026 |
Gas, mcf lease total
Last 12 months 52,997 · prior 12 59,931(-12%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Houston Exploration Company, TheJun 2006 → Jun 2007
- 2Forest Oil CorporationJul 2007 → Dec 2012
- 3Hilcorp Energy CompanyJan 2013 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 619090-99 | Drill | Houston Exploration Company, The | May 10, 2006 | May 11, 2006 | May 19, 2006 | 10,100 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jun 19, 2008 | Maria Cuellar G-4-221580 | Cisco-Benavides (Lobo Cons.) | Hilcorp Energy Company | Producing | 9,600 |
Formation tops
As filed on W-2/G-1. Subsea from 405 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Lobo 2 | 8,920 | -8,515 |
| Lobo 3 | 9,090 | -8,685 |
| Lobo 6 | 9,250 | -8,845 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,754 | 7,763 | Perforated |
| 7,784 | 7,790 | Perforated |
| 8,070 | 8,076 | Perforated |
| 8,070 | 9,312 | Perforated |
| 8,078 | 8,088 | Perforated |
| 8,091 | 8,094 | Perforated |
| 8,295 | 8,305 | Perforated |
| 8,959 | 8,962 | Perforated |
| 8,965 | 8,968 | Perforated |
| 8,972 | 8,980 | Perforated |
| 9,114 | 9,116 | Perforated |
| 9,119 | 9,128 | Perforated |
| 9,252 | 9,266 | Perforated |
| 9,288 | 9,306 | Perforated |
| 9,308 | 9,312 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 787 | 12.25 | 350 S |
| 7 | 6,499 | 8.75 | 400 S |
| 3.5 | 9,600 | 6.125 | 430 S |
| 3.5 | 9,600 | 6.25 | 430 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 | Dec 23, 2008 | Jul 25, 2008 | — |
| 00 | Sep 22, 2008 | May 1, 2008 | — |
| 00 | Apr 27, 2007 | Feb 1, 2007 | — |
| 00 | Mar 8, 2007 | Aug 11, 2006 | Yes |
| 00 | Nov 16, 2006 | — | — |
Well logs
1 log loaded from the RRC's log index, the latest received Jun 19, 2009. Density, Neutron, 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 |
|---|---|---|---|---|
| COMBINATION: RESISTIVITY/NEUTRON/DENSITY POROSITYSpans Lobo 2 | TIFF | 6,504 to 8,996 | Jun 19, 2009run Jun 3, 2006 | 0.37 |
"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 42-505-35582 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-505-35582 → 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/50535582, documented in the API reference.