UNIVERSITY -D-

Oil // district 10 // lease#27868

op: PIEDRA OPERATING, LLC

cum_oil

254k BBL

cum_gas

0 MCF

wells

4

production

1993-01 — 2026-03

peak_month

1993-02

-- production_history

cum_oil: 254,040 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

2,136 BBL/mo

Di (annual)

12.8%

b-factor

0.3

EUR

262,940 BBL

R-squared

0.843

type

hyperbolic

-- wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2025SOUTH RANCH OIL CO., INC.312,8001999-11-24
3025OILFIELD MANAGEMENT, INC. (A)412,8001993-04-19
4025ASOUTH RANCH OIL CO., INC.112,7001985-07-08
125SOUTH RANCH OIL CO., INC.212,6211982-01-22
EOF // multi-state drilling data platform // 2026