ROCK PEN CLEARFORK UNIT

Oil // district 9 // lease#13010

op: ST. MARY LAND & EXPLORATION CO.

cum_oil

927k BBL

cum_gas

0 MCF

wells

28

production

1993-01 — 2021-07

peak_month

1993-01

-- production_history

cum_oil: 926,618 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

17,497 BBL/mo

Di (annual)

32.3%

b-factor

0.3

EUR

912,958 BBL

R-squared

0.965

type

hyperbolic

-- wells (28)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2230ARMOR PETROLEUM, INC.23,7002008-03-13
2115SIETE OIL AND GAS CORPORATION13,8001992-08-18
27SIETE OIL AND GAS CORPORATION23,8001992-02-12
2224SIETE OIL AND GAS CORPORATION13,7001990-07-26
2225SIETE OIL AND GAS CORPORATION13,7001990-06-21
2223SIETE OIL AND GAS CORPORATION23,9001989-07-24
2221Q E D EXPLORATION, INC.13,8501988-06-15
2112Q E D EXPLORATION, INC.13,7001986-02-04
2220Q E D EXPLORATION, INC.13,6501985-12-02
2110Q E D EXPLORATION, INC.13,6001985-11-19
2219Q E D EXPLORATION, INC.13,9001985-02-11
2307Q E D EXPLORATION, INC.13,8501985-01-03
2304Q E D EXPLORATION, INC.13,8501984-11-19
2303Q E D EXPLORATION, INC.13,9001984-11-16
2306Q E D EXPLORATION, INC.14,0001984-11-16
2217Q E D EXPLORATION, INC.13,7501984-05-22
2216Q E D EXPLORATION, INC.13,8001984-04-24
1901Q E D EXPLORATION, INC.27,2001984-04-03
2106Q E D EXPLORATION, INC.13,6001984-02-27
2214Q E D EXPLORATION, INC.13,8001984-01-30
2215Q E D EXPLORATION, INC.13,7501983-12-14
2104Q E D EXPLORATION, INC.13,7001983-12-08
2103Q E D EXPLORATION, INC.13,8001983-10-18
2211Q E D EXPLORATION, INC.13,8001983-10-18
2212Q E D EXPLORATION, INC.13,8001983-10-18
2209Q E D EXPLORATION, INC.13,8001983-08-25
2207Q E D EXPLORATION, INC.13,7001983-03-09
2205Q E D EXPLORATION, INC.13,7001982-12-10
EOF // multi-state drilling data platform // 2026