WILLIAMS

Oil · District 7C · Lease #4661

Operator: STEPHENS, AUTRY C.

Cum Oil

156k BBL

Cum Gas

1.4M MCF

casinghead

Wells

6

Production

1993-01 — 2026-04

Peak Month

2011-12

Production History

Cum Oil: 155,666 BBL Cum Gas: 1,442,790 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,459 BBL/mo

Di (annual)

25.2%

b-factor

0.5

EUR

119,798 BBL

R-squared

0.564

type

hyperbolic

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
1993-06 — 2000-08 STEPHENS, AUTRY C. 87 mo
1993-01 — 1993-05 MWJ PRODUCING COMPANY 5 mo

Wells (6)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
5DIAMONDBACK E&P LLC112,0002009-11-06
6DIAMONDBACK E&P LLC112,0002009-11-06
142-383-10325DIAMONDBACK E&P LLC------
242-383-10673DIAMONDBACK E&P LLC------
342-383-10702DIAMONDBACK E&P LLC------
442-383-10737DIAMONDBACK E&P LLC------