← Wells

42-383-33530

Final Completion

ROCKER B. -N-

REAGAN County · District 7 · PIONEER NATURAL RES. USA INC. · SPRABERRY (TREND AREA)

Permits

1

Max Depth

7,200 ft

First Permit

1985-07-30

Latest Activity

1985-07-30

Lifespan

< 1 yr

Regulatory Status

Schedule

OFF SCHEDULE

Completion

1985-12-15

Shut-In

—

Plugged

2014-11-03

!

EWA / Permit operator mismatch

Scheduling: PIONEER NATURAL RES. USA INC. ≠ Permit: COX, JOHN L.

Resolved via: production → PIONEER NATURAL RES. USA, INC.

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2026-07

Operator History

Chain of Custody

GRAHAM ROYALTY, LTD. 1993-1993→ MIDPAR L.P. 1993-1995→ PARKER & PARSLEY DEVELOPMENT L.P 1995-1997→ PIONEER NATURAL RES. USA, INC. 1997-2026→ PRIZE OPERATING COMPANY 1999-2002→ GRUY PETROLEUM MANAGEMENT CO. 2002-2006→ CIMAREX ENERGY CO. OF COLORADO 2006-2007

Lease Production

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

Oil
production & DCA →

Formation Tops (4) Elevation 2,453 ft (GR)

CSV
FormationTop Depth (MD)Subsea (+above / −below SL)
SANTA ROSA 600 ft+1,853 ft
UPPER SPRABERRY (Spraberry)5,200 ft-2,747 ft
LOWER SPRABERRY (Spraberry)5,920 ft-3,467 ft
DEAN 6,610 ft-4,157 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 (3)

IntervalType
5,214–5,234 ftPerforated
5,940–6,202 ftPerforated
6,626–6,808 ftPerforated

Casing (2)

SizeSet DepthCement
8.625"658 ft500 sx
4.5"6,870 ft1,000 sx

Permit History (1)

#281369 Drill Final Completion

ROCKER B "N" · 7,200 ft

1985-07-30

Applications (1)

#281369 A COX, JOHN L.
received 1985-07-29

Records & Logs

2 completion filings on record · 1 with log images at RRC.

W-2/G-1 1985-12-18 log on file
W-2/G-1 1986-01-01
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 REAGAN County.

Well Details

Well Number
35
Max Depth
7,200 ft
Drill Type
Vertical
County
REAGAN
District
7
Operator
PIONEER NATURAL RES. USA INC.
Completed
1985-12-15

Operator

Location
Y SPRING
P-5 Status
Active (filed 2025-08-01)
Cum Oil (all leases)
1,771,882,421 bbl
Cum Gas (all leases)
1,763,727,021 mcf
Activities
CSGD/G, CSGD/P, G/PUR, GTHS/G, GTHS/O, OPRS/G, OPRS/O
Total Permits
15,403