COWDEN -46-

Oil · District 08 · Lease #32413

Operator: QUAY VALLEY, INC.

Cum Oil

125k BBL

Cum Gas

416k MCF

casinghead

Wells

4

Production

1993-01 — 2023-06

Peak Month

2008-09

Production History

Cum Oil: 124,716 BBL Cum Gas: 415,744 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,275 BBL/mo

Di (annual)

23.8%

b-factor

0.5

EUR

109,887 BBL

R-squared

0.534

type

hyperbolic

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 (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
5PIONEER NATURAL RES. USA INC.110,7002008-03-03
4PIONEER NATURAL RES. USA INC.110,4252007-08-07
3PIONEER NATURAL RES. USA INC.18,9001989-09-19
1PIONEER NATURAL RES. USA, INC.29,8391984-11-20