COMBS-WORLEY

Oil · District 10 · Lease #512

Operator: THE OPERATING CO.

Cum Oil

302k BBL

Cum Gas

1.4M MCF

casinghead

Wells

15

Production

1993-01 — 2026-04

Peak Month

1997-06

Production History

Cum Oil: 301,840 BBL Cum Gas: 1,447,187 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

2,970 BBL/mo

Di (annual)

21.5%

b-factor

0.6

EUR

306,139 BBL

R-squared

0.923

type

hyperbolic

Operator History (from monthly production reports)

2018-02 — 2026-07 PONDEROSA TX OPERATING LLC 102 mo
2007-10 — 2018-01 LEGACY RESERVES OPERATING LP 124 mo
1996-09 — 2007-09 THE OPERATING CO. 133 mo
1995-03 — 1996-08 LUXOR OIL & GAS, INC. 18 mo
1993-11 — 1995-02 MIDPAR L.P. 16 mo
1993-01 — 1993-10 GRAHAM ROYALTY, LTD. 10 mo

Wells (15)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
20PONDEROSA TX OPERATING LLC14,0001986-12-11
19PONDEROSA TX OPERATING LLC14,0001986-12-05
14PONDEROSA TX OPERATING LLC14,0001986-11-26
16PONDEROSA TX OPERATING LLC13,5001985-04-25
12PONDEROSA TX OPERATING LLC13,5001985-03-18
10PONDEROSA TX OPERATING LLC13,5001984-09-13
13PONDEROSA TX OPERATING LLC13,5001984-09-13
15PONDEROSA TX OPERATING LLC13,5001984-09-13
11PONDEROSA TX OPERATING LLC13,5001984-06-21
9PONDEROSA TX OPERATING LLC14,0001984-02-14
4PONDEROSA TX OPERATING LLC13,8001979-03-06
142-179-82578PONDEROSA TX OPERATING LLC------
242-179-82579PONDEROSA TX OPERATING LLC------
542-179-05078PONDEROSA TX OPERATING LLC------
7W42-179-07519PONDEROSA TX OPERATING LLC------