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CHALK OTIS

HOWARD County · District 8 · APACHE CORPORATION · HOWARD-GLASSCOCK (GLORIETA)

Permits

1

Max Depth

3,400 ft

First Permit

2001-06-07

Latest Activity

2001-06-07

Lifespan

< 1 yr

Regulatory Status

Schedule

OFF SCHEDULE

Completion

2011-06-23

Shut-In

Plugged

!

EWA / Permit operator mismatch

Scheduling: APACHE CORPORATION ≠ Permit: WESTPORT OIL AND GAS COMPANY INC

Resolved via: productionAPACHE CORPORATION

Production Summary

Cum Oil

bbl

Cum Gas

mcf

First Production

1993-01

Last Production

2026-07

H-1 Injection Active UIC #000091751 permitted 2001-11-28

Permitted Volume

625 bbl/d

Max Pressure

1,050 psi

Injection Interval

2,150–2,700 ft

Injected (12mo)

H-1 Injection Active UIC #000091752 permitted 2001-11-28

Permitted Volume

625 bbl/d

Max Pressure

1,200 psi

Injection Interval

2,700–3,400 ft

Injected (12mo)

Monthly injected volume (bbl, from H-10 filings through 2025-12-01)

Lease Production

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

Formation Tops (5) Elevation 2,680 ft (GR)

CSV
FormationTop Depth (MD)Subsea (+above / −below SL)
YATES 1,387 ft+1,293 ft
SEVEN RIVERS 1,480 ft+1,200 ft
QUEEN 1,664 ft+1,016 ft
SAN ANDRES 2,177 ft+503 ft
GLORIETA 2,810 ft-130 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
2,236–2,572 ftPerforated
2,870–3,255 ftPerforated

Casing (2)

SizeSet DepthCement
9.625"377 ft200 sx
7"3,400 ft635 sx

Permit History (1)

Applications (1)

#509516 A WESTPORT OIL AND GAS COMPANY INC
received 2001-05-29

Records & Logs

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

W-2/G-1 2024-02-13
W-2/G-1 2011-07-21
W-2/G-1 2002-02-28 log on file
W-2/G-1 2011-07-21
W-2/G-1 2002-02-28 log on file
W-2/G-1 2002-05-22

Completion packets open directly (post-2011 filings include attached logs). Log images 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 HOWARD County.

Well Details

Well Number
21W
Max Depth
3,400 ft
Drill Type
Vertical
County
HOWARD
District
8
Completed
2011-06-23

Operator

Location
HOUSTON
P-5 Status
Active (filed 2025-12-03)
Cum Oil (all leases)
615,928,793 bbl
Cum Gas (all leases)
2,702,742,169 mcf
Activities
CSGD/G, CSGD/P, G/PUR, GTHS/G, GTHS/O, OPRS/G, OPRS/O
Total Permits
9,662