COWDEN 40 -B-

Oil · District 08 · Lease #23961

Operator: QUAY VALLEY, INC.

Cum Oil

493k BBL

Cum Gas

5.7M MCF

casinghead

Wells

6

Production

1993-01 — 2026-04

Peak Month

2014-08

Production History

Cum Oil: 492,907 BBL Cum Gas: 5,703,486 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

7,612 BBL/mo

Di (annual)

24.9%

b-factor

0.0

EUR

366,143 BBL

R-squared

0.968

type

exponential

Operator History (from monthly production reports)

2006-06 — 2026-07 PIONEER NATURAL RES. USA, INC. 242 mo
2006-05 — 2006-05 BIG STAR OIL & GAS, LLC 1 mo
2004-10 — 2006-04 QUAY VALLEY, INC. 19 mo
1993-10 — 2004-09 MIDKIFF, JOHN 132 mo
1993-01 — 1993-09 PLAINS PETROLEUM OPERATING CO. 9 mo

Wells (6)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
8PIONEER NATURAL RES. USA, INC.112,0002013-10-03
7PIONEER NATURAL RES. USA, INC.110,6002007-03-14
5PIONEER NATURAL RES. USA, INC.18,9001989-09-13
6PIONEER NATURAL RES. USA, INC.18,9001989-09-13
342-329-30385PIONEER NATURAL RES. USA, INC.------
442-329-30376PIONEER NATURAL RES. USA, INC.------