PARKER RANCHLAND 21

Oil // district 10 // lease#44727

op: ROBERTSON RESOURCES, INC.

cum_oil

145k BBL

cum_gas

0 MCF

wells

4

production

2013-11 — 2026-03

peak_month

2014-03

-- production_history

cum_oil: 145,425 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

15,543 BBL/mo

Di (annual)

602.2%

b-factor

0.8

EUR

116,232 BBL

R-squared

0.787

type

hyperbolic

-- wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
6OXY USA WTP LP210,0002014-06-12
5OXY USA WTP LP210,0002014-06-06
2ICA ENERGY OPERATING, L.L.C19,6002013-11-21
1ICA ENERGY OPERATING, L.L.C29,6002013-07-11
EOF // data source: Texas Railroad Commission // 2026