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TEXAS · WELLS · DAWSON COUNTY · WEST WELCH UNIT LEASE · API 42-115-32225 · DISTRICT 7B

West Welch Unit #3515

On schedule

Dawson County · Welch field · Injection  · Vertical

West Welch Unit #3515 (API 42-115-32225) is a well in Dawson County operated by Hilcorp Energy Company, completed January 2, 2024 and listed as injection on the RRC schedule.

The RRC has issued one drilling permit, issued May 21, 1985, permitted to 4,895 ft.

It was permitted by Cities Service Oil & Gas Corp. and has since transferred to Hilcorp Energy Company on the wellbore schedule.

Completion filings report 3 formation tops, including Yates, Grayburg, San Andres.

Its lease has reported 20.4M barrels of oil and 7.45M mcf of gas since January 1993, last reporting volume in April 2026. The lease carries 687 wells, so these are lease totals, not this well alone.

It holds an active disposal or injection permit, with 30.4K barrels injected in the 12 months reported through August 2025.

Operator of record

Hilcorp Energy Company

Permitted by Cities Service Oil & Gas Corp.; 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
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SOURCE · RRC EWA WELLBORE SCHEDULE

What each RRC source says

Wellbore scheduleHilcorp Energy Company
Production reportsOXY USA WTP EOR, LLCthrough Apr 2026
Latest permitCities Service Oil & Gas Corp.May 21, 1985

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

4,895
total depth, ft
1
permits on file
May 21, 1985
last permit issued
Jan 2, 2024
completed
20.4M
cumulative oil, bbl
7.45M
cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Apr 2026

On this page4 formation topsLease production2 completionsInjection volumes

Regulatory status · RRC wellbore file

Schedule
ON SCHEDULE
Completed
Jan 2, 2024
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.

Wells nearby

Every well with a location on file around this well, in any state, nearest first.

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Texas locations come from drilling permits, so most older Texas wells have none and are not listed.

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 687 wells in total, so volumes are shared.Why →

LeaseFieldReporting operatorWellsOil, bblGas, mcfReported
West Welch Unit O-11-14783WelchOXY USA WTP EOR, LLC68720.4M7.45MJan 1993 – Apr 2026

Oil, barrels lease total

Last 12 months 150,556 · prior 12 191,736(-21%)

010K20K202420252026

Gas, mcf lease total

Last 12 months 76,284 · prior 12 90,932(-16%)

05K10K15K202420252026

Wells named West Welch Unit

Hilcorp Energy Company's other wells filed under this lease name in Dawson County, newest permit first. The RRC gives a gas well its own lease number, so the name is what joins the wells of a unit.

Loading the lease's wells

Chain of custody

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

  1. 1OXY USA Inc.Jan 1993 → Dec 2000
  2. 2OXY USA WTP LPJan 2001 → Apr 2026

Permits

PermitTypeOperatorReceivedIssuedSpudDepth
275800-99DrillCities Service Oil & Gas Corp.Sep 5, 1985May 21, 1985—4,950

Completions

CompletedLeaseFieldOperatorStatusDepth
Jan 2, 2024West Welch Unit O-11-14783WelchHilcorp Energy CompanyInjection4,895
Aug 28, 1985West Welch Unit O-11-14783WelchHilcorp Energy CompanyNot on Schedule—

Formation tops

As filed on W-2/G-1. Subsea from 3,120 ft elevation.Download CSV →

FormationMD ftSubsea
Yates2,947173
Grayburg4,122-1,002
San Andres4,800-1,680
San Andres4,880-1,760

Perforations

Perforated and open-hole intervals.

FromToType
4,8004,886Perforated

Casing

Strings as reported, shallowest first.

Casing inSet atHole inCement
8.6252,02412.251,000 S
5.54,8937.8751,150 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 →

SuffixRRC record dateW-2 / G-1 dateLogs referenced
00Apr 14, 2025Aug 30, 2024—
00May 3, 1990Mar 16, 1990—
00Apr 25, 1990Sep 4, 1985—
00Nov 14, 1985Sep 4, 1985—
00Nov 8, 1985——

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 filed since 2004 open from the RRC's log search for this well; none are loaded here for it. The University Lands library has no per-well link: then paste it into its search.

Find logs withinmiles of this well:List →Map →

Beyond the permit record

RRC UIC permits · H-10 reported volumes

Injection

30.4K
bbl, last 12 reported months
2.07M
bbl, all reported
Aug 2025
reported through
UICKindStatusPermitted bbl/dMax psiZone ft
000060947H-1 InjectionActive5,0002,3504,800–4,886

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

Last 12 months 30,447 · prior 12 34,919(-13%)

02K4K6K20242025

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

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