WINTER

Oil // district 10 // lease#40713

op: NORTHSTAR OPERATING COMPANY

cum_oil

285k BBL

cum_gas

0 MCF

wells

9

production

2010-12 — 2026-03

peak_month

2012-11

-- production_history

cum_oil: 285,246 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

7,150 BBL/mo

Di (annual)

90.3%

b-factor

0.9

EUR

322,308 BBL

R-squared

0.962

type

hyperbolic

-- wells (9)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
9BLACKBEARD OPERATING, LLC16,0002017-12-20
8NORTHSTAR OPERATING COMPANY15,2002013-12-05
7NORTHSTAR OPERATING COMPANY15,2002013-03-08
6NORTHSTAR OPERATING COMPANY15,2002012-09-12
5NORTHSTAR OPERATING COMPANY15,0002012-01-24
4NORTHSTAR OPERATING COMPANY15,0002011-07-13
1NORTHSTAR OPERATING COMPANY39,5002011-06-15
3NORTHSTAR OPERATING COMPANY15,0002010-11-03
2NORTHSTAR OPERATING COMPANY16,5002010-03-30
EOF // data source: Texas Railroad Commission // 2026