BIGBY, J. O. -10-

Oil · District 08 · Lease #31929

Operator: STEPHENS, AUTRY C.

Cum Oil

146k BBL

Cum Gas

1.1M MCF

casinghead

Wells

3

Production

1993-01 — 2026-04

Peak Month

1994-04

Production History

Cum Oil: 146,090 BBL Cum Gas: 1,116,278 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

661 BBL/mo

Di (annual)

6.0%

b-factor

0.0

EUR

124,970 BBL

R-squared

0.448

type

exponential

Operator History (from monthly production reports)

2025-01 — 2026-07 DIAMONDBACK E&P LLC 19 mo
2000-09 — 2024-12 ENDEAVOR ENERGY RESOURCES L.P. 292 mo
1993-08 — 2000-08 STEPHENS, AUTRY C. 85 mo
1993-01 — 1993-07 ARCO OIL & GAS CO. 7 mo

Wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4DIAMONDBACK E&P LLC19,2001993-09-16
12BDIAMONDBACK E&P LLC18,3501985-12-31
10BDIAMONDBACK E&P LLC18,4001979-10-26