FIRST NATIONAL TRUST

Oil // district 14 // lease#4807

op: COURSON OIL & GAS, INC.

cum_oil

254k BBL

cum_gas

0 MCF

wells

7

production

1993-01 — 2026-03

peak_month

1994-03

-- production_history

cum_oil: 253,966 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

1,876 BBL/mo

Di (annual)

15.9%

b-factor

0.5

EUR

226,212 BBL

R-squared

0.694

type

hyperbolic

-- wells (7)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2571COURSON OIL & GAS, INC.17,1502021-02-10
9571COURSON OIL & GAS, INC.16,0001993-10-19
8571COURSON OIL & GAS, INC.15,9001986-10-30
7571COURSON OIL & GAS, INC.15,8001984-12-31
6571COURSON OIL & GAS, INC.15,8001984-11-19
5571COURSON OIL & GAS, INC.15,8001983-09-06
1571COURSON OIL & GAS, INC.311,8001981-05-22
EOF // data source: Texas Railroad Commission // 2026