NATIONAL

Oil · District 10 · Lease #222

Operator: TOMBSTONE PRODUCTION, INC.

Cum Oil

13k BBL

Cum Gas

9 MCF

casinghead

Wells

8

Production

1993-01 — 2016-12

Peak Month

1998-08

Production History

Cum Oil: 13,076 BBL Cum Gas: 9 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

96 BBL/mo

Di (annual)

18.2%

b-factor

0.0

EUR

6,258 BBL

R-squared

0.435

type

exponential

Operator History (from monthly production reports)

2018-05 — 2026-07 BORGER RESOURCES 4 LLC 99 mo
2016-10 — 2018-04 PONDEROSA TX OPERATING LLC 19 mo
2007-05 — 2016-09 TOMBSTONE PRODUCTION INC. 113 mo
2005-01 — 2007-04 TOMBSTONE PRODUCTION, INC. 28 mo
2001-05 — 2004-12 CHASE, D. E., INC. 44 mo
1997-03 — 2001-04 CHASE OILFIELD SERVICE 50 mo
1993-01 — 1997-02 BRADLEY OPERATING CO. 50 mo

Wells (8)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2PONDEROSA TX OPERATING LLC12,8422003-06-16
142-179-81177BORGER RESOURCES 4 LLC------
342-179-81179BORGER RESOURCES 4 LLC------
442-179-03569BORGER RESOURCES 4 LLC------
5W42-179-00863BORGER RESOURCES 4 LLC------
642-179-81182BORGER RESOURCES 4 LLC------
742-179-81183BORGER RESOURCES 4 LLC------
8W42-179-00862BORGER RESOURCES 4 LLC------