Petrora

WELL · 42-461-34038 · DISTRICT 7

Sylvia #1

Plugged

Upton County · Spraberry (Trend Area) field  · Vertical

Sylvia #1 (API 42-461-34038) is a plugged well in Upton County, plugged May 10, 2018, last operated by Cog Operating LLC.

The RRC has issued 2 drilling permits between 2000 and 2012, permitted to 11,000 ft.

It was permitted by Summit Petroleum LLC and has since transferred to Cog Operating LLC on the wellbore schedule.

Completion filings report 8 formation tops, including San Andres, T/San Andres, Clear Fork, Leonard.

Its 4 leases have reported 300K barrels of oil and 1.88M mcf of gas since August 2000, last reporting in July 2026. The leases carry 8 wells, so these are lease totals, not this well alone.

Operator of record

COG Operating LLC

Permitted by Summit Petroleum LLC; the EWA schedule now lists a different operator.

Based in
Midland, TX
P-5 status
Active – Extension (X)
P-5 last filed
Jun 2, 2026
Permits on file
4,568
Phone
(432) 683-7443

SOURCE · RRC EWA WELLBORE SCHEDULE

What each RRC source says

Wellbore scheduleCOG Operating LLC
Production reportsCOG Operating LLCthrough Apr 2026
Latest permitSummit Petroleum LLCJun 4, 2012

The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.

11,000
total depth, ft
2
permits on file
Jun 4, 2012
last permit issued
Feb 10, 2013
completed
300K
cumulative oil, bbl
1.88M
cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · Aug 2000 THROUGH Jul 2026

Regulatory status · RRC wellbore file

Schedule
OFF SCHEDULE
Completed
Feb 10, 2013
Shut in
—
Plugged
May 10, 2018

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 4 leases this well is completed on; they carry 8 wells in total, so volumes are shared.Why →

LeaseFieldReporting operatorWellsOil, bblGas, mcfReported
Sylvia O-9-18037Spraberry (Trend Area)COG Operating LLC5164K830KOct 2012 – Jul 2026
Sylvia O-9-17064Amacker-Tippett, SW (Wolfcamp)True Oil Company LLC15.94K0Apr 2009 – Dec 2014
Sylvia G-9-199504Amacker-Tippett, SW (Wolfcamp)Summit Petroleum LLC1098.1KOct 2003 – Oct 2013
Hall "82" O-9-15013Amacker-Tippett, SW (Wolfcamp)EOG Resources, Inc.1130K948KAug 2000 – Mar 2004

Gas, mcf lease total

Last 12 months 31,759 · prior 12 41,281(-23%)

02K4K6K202420252026

Oil, barrels lease total

Last 12 months 3,264 · prior 12 4,119(-21%)

05001K202420252026

Chain of custody

Every operator that reported production on this well's lease, in order.

  1. 1EOG Resources, Inc.Aug 2000 → Aug 2011
  2. 2Summit Petroleum LLCOct 2011 → Feb 2017
  3. 3True Oil Company LLCDec 2014 → Mar 2016
  4. 4COG Operating LLCMar 2017 → Apr 2026

Permits

PermitTypeOperatorReceivedIssuedSpudDepth
739321-99Field transferSummit Petroleum LLCApr 27, 2012Jun 4, 2012Oct 30, 201211,000
494087-99DrillEOG Resources, Inc.Apr 14, 2000Apr 14, 2000Jul 1, 20009,700

Completions

CompletedLeaseFieldOperatorStatusDepth
—— G-9-199504————
—— O-9-15013————
—— O-9-17064————
—— O-9-18037————

Formation tops

As filed on W-2/G-1. Subsea from 2,806 ft elevation.Download CSV →

FormationMD ftSubsea
San Andres4,750-1,944
T/San Andres4,750-1,944
Clear ForkCLEARFORK6,635-3,829
LeonardLEONARD 17,215-4,409
LeonardLEONARD 37,810-5,004
Dean8,570-5,764
T/Dean8,570-5,764
T/Wolfcamp8,655-5,849
Wolfcamp8,655-5,849

Perforations

Perforated and open-hole intervals.

FromToType
6,6357,986Perforated
8,9169,216Perforated
9,2029,213Perforated
9,2089,280Perforated
9,3769,406Perforated

Casing

Strings as reported, shallowest first.

Casing inSet atHole inCement
9.62553312.25329 S
78,5678.751,305 S
4.59,4966.1251,055 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 →

SuffixFiledW-2 / G-1 dateLogs referenced
00Nov 4, 2013May 22, 2013Yes
00Jan 21, 2011Oct 22, 2010—
00Nov 19, 2010Oct 22, 2010—
00Mar 12, 2010Apr 22, 2009—
00Mar 4, 2010Apr 22, 2009—
00Feb 5, 2010—Yes
00Apr 2, 2004Oct 20, 2003—
00Mar 4, 2004—Yes
00Nov 1, 2000Aug 7, 2000Yes
00Aug 30, 2000—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.

Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward) and the University Lands library. then paste it into their search.

Beyond the permit record

RRC UIC permits · H-10 reported volumes

Injection

0
bbl, last 12 reported months
744K
bbl, all reported
Aug 2014
reported through
UICKindStatusPermitted bbl/dMax psiZone ft
000092786H-1 InjectionPlugged Jun 4, 20183,0002,5008,000–9,600

MONTHLY INJECTED, BBL · H-10 · LAST 24 REPORTED MONTHS

Last 12 months 0 · prior 12 0

0120132014

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/46134038, documented in the API reference.