CLARK 1

Oil // district 10 // lease#40873

op: OVINTIV USA INC.

cum_oil

166k BBL

cum_gas

0 MCF

wells

11

production

2010-10 — 2026-03

peak_month

2014-11

-- production_history

cum_oil: 166,188 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

1,226 BBL/mo

Di (annual)

12.4%

b-factor

0.0

EUR

118,278 BBL

R-squared

0.407

type

exponential

-- wells (11)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1208ATHLON HOLDINGS LP110,5202014-09-30
1207ATHLON HOLDINGS LP110,5002014-07-30
1206ATHLON HOLDINGS LP110,6002014-05-01
8ATHLON HOLDINGS LP210,3002013-10-01
7ATHLON FE OPERATING LLC111,5002012-03-05
6ATHLON FE OPERATING LLC211,0002012-01-30
5ELEMENT PETROLEUM OPERATING, LLC111,0002011-08-05
4ELEMENT PETROLEUM OPERATING, LLC111,0002011-06-16
3ELEMENT PETROLEUM OPERATING, LLC111,0002010-11-08
2ELEMENT PETROLEUM OPERATING, LLC111,0002010-11-03
1ELEMENT PETROLEUM OPERATING, LLC111,0002010-07-29
EOF // data source: Texas Railroad Commission // 2026