WILLIAMS, S.P.

Oil · District 10 · Lease #586

Operator: XTO ENERGY INC.

Cum Oil

782k BBL

Cum Gas

285k MCF

casinghead

Wells

16

Production

1993-01 — 2026-04

Peak Month

1994-05

Production History

Cum Oil: 781,742 BBL Cum Gas: 285,221 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

3,558 BBL/mo

Di (annual)

4.3%

b-factor

0.0

EUR

883,911 BBL

R-squared

0.812

type

exponential

Operator History (from monthly production reports)

2021-11 — 2026-07 LARGE OPERATING LLC 57 mo
2004-09 — 2021-10 XTO ENERGY INC. 206 mo
2002-06 — 2004-08 CHEVRON U. S. A. INC. 27 mo
1993-01 — 2002-05 TEXACO E & P INC. 113 mo

Wells (16)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
12LARGE OPERATING LLC13,2501996-10-15
13LARGE OPERATING LLC13,2501996-08-01
14LARGE OPERATING LLC23,2501995-03-06
11LARGE OPERATING LLC23,8451994-07-11
10LARGE OPERATING LLC13,2501993-02-04
9LARGE OPERATING LLC13,2751992-09-24
142-179-82954LARGE OPERATING LLC------
242-179-82955LARGE OPERATING LLC------
342-179-82956LARGE OPERATING LLC------
442-179-82957LARGE OPERATING LLC------
542-179-01112LARGE OPERATING LLC------
642-179-01113LARGE OPERATING LLC------
6W42-179-01113LARGE OPERATING LLC------
742-179-01614LARGE OPERATING LLC------
7W42-179-01614LARGE OPERATING LLC------
842-179-01617LARGE OPERATING LLC------