AMERICAN NATIONAL LIFE INS.CO.

Oil // district 10 // lease#37624

op: VANGUARD OPERATING, LLC

cum_oil

31k BBL

cum_gas

0 MCF

wells

5

production

2005-12 — 2026-03

peak_month

2011-06

-- production_history

cum_oil: 31,032 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

662 BBL/mo

Di (annual)

93.7%

b-factor

0.4

EUR

13,856 BBL

R-squared

0.754

type

hyperbolic

-- wells (5)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
54EAGLE ROCK OPERATING COMPANY,LLC29,3002013-03-04
42STANOLIND OPERATING CORP.29,4002012-05-29
43STANOLIND OPERATING CORP.39,5002010-09-01
48EAGLE ROCK OPERATING COMPANY,LLC19,2002010-01-14
45STANOLIND OPERATING CORP.29,5002006-02-27
EOF // data source: Texas Railroad Commission // 2026