UT UNIVERSITY

Oil // district 10 // lease#44895

op: PIEDRA OPERATING, LLC

cum_oil

41k BBL

cum_gas

0 MCF

wells

1

production

2013-10 — 2026-03

peak_month

2013-11

-- production_history

cum_oil: 40,665 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

1,521 BBL/mo

Di (annual)

72.7%

b-factor

0.4

EUR

41,130 BBL

R-squared

0.716

type

hyperbolic

-- wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1FIVESTONES ENERGY LLC113,5002013-02-14
EOF // data source: Texas Railroad Commission // 2026