NATIONAL

Oil // district 14 // lease#222

op: TOMBSTONE PRODUCTION, INC.

cum_oil

13k BBL

cum_gas

0 MCF

wells

8

production

1993-01 — 2026-03

peak_month

1998-08

-- production_history

cum_oil: 13,076 BBL cum_gas: 0 MCF

-- 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

-- wells (8)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2CHASE, D. E., INC.12,8422003-06-16
142-179-81177--------
342-179-81179--------
442-179-03569--------
5W42-179-00863--------
642-179-81182--------
742-179-81183--------
8W42-179-00862--------
EOF // multi-state drilling data platform // 2026