TEXAS TECH UNIVERSITY

Oil // district 10 // lease#44551

op: PIEDRA OPERATING, LLC

cum_oil

40k BBL

cum_gas

0 MCF

wells

1

production

2013-09 — 2026-03

peak_month

2013-11

-- production_history

cum_oil: 39,639 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

954 BBL/mo

Di (annual)

32.4%

b-factor

0.1

EUR

39,179 BBL

R-squared

0.736

type

hyperbolic

-- wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2FIVESTONES ENERGY LLC113,5002013-02-25
EOF // data source: Texas Railroad Commission // 2026