42-135-35214

WILLIAMSON ESTATE 28

ECTOR County · District 8 · OXY USA INC.

Permits

3

Max Depth

8,600 ft

First Permit

1985-12-19

Latest Activity

1999-10-13

Lifespan

14 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

Shut-In

Plugged

Production Summary

Cum Oil

bbl

Cum Gas

mcf

First Production

1993-01

Last Production

2012-03

Lease Production

Production is reported at the lease level. View production data, decline curves, and history on the lease page.

Formation Tops (2) Elevation 3,360 ft (KB)

CSV
FormationTop Depth (MD)Subsea (+above / −below SL)
SAN ANDRES 4,220 ft-860 ft
CLEARFORK (Clear Fork)5,632 ft-2,272 ft

As reported by operators on W-2/G-1 completion filings (RRC wellbore records). Depths are measured depth; names appear as filed. Subsea = reported elevation − measured depth (negative = below sea level; vertical wellbores only). View filings & logs at RRC ↗

Perforations (2)

IntervalType
4,221–4,324 ftPerforated
5,717–5,750 ftPerforated

Casing (4)

SizeSet DepthCement
13.375"293 ft350 sx
8.625"3,800 ft1,700 sx
8.625"3,800 ft1,700 sx
5.5"8,200 ft5,900 sx

Permit History (3)

Applications (3)

#488473 A OXY USA INC.
received 1999-10-13
#369818 A MARIAH ENERGY CORP.
received 1990-02-13
#293446 A RUST OIL CORP.
received 1985-12-19

Records & Logs

4 completion filings on record · 2 with log images at RRC.

W-2/G-1 1990-03-06 log on file
W-2/G-1 1990-03-20
W-2/G-1 1986-02-26 log on file
W-2/G-1 1986-03-05
Completion packets + logs ↗ Wellbore filings ↗

Completion packets open directly (post-2011 filings include attached logs). Log images and the UL library can't be deep-linked — clicking copies the API for you to paste.

No GPS coordinates yet

Coordinates come from the RRC GIS backfill and usually appear within days of permit issuance. Located in ECTOR County.

Well Details

Well Number
1
Max Depth
8,600 ft
Drill Type
Vertical
County
ECTOR
District
8
Operator
OXY USA INC.

Operator

Location
HOUSTON
P-5 Status
Active (filed 2026-01-26)
Cum Oil (all leases)
277,250,617 bbl
Cum Gas (all leases)
814,544,078 mcf
Activities
CSGD/G, CSGD/P, G/PUR, GTHS/G, OPRS/G, OPRS/O
Total Permits
3,287