GRAMM UNIT

Oil · District 02 · Lease #9874

Operator: VALIDUS NRG AQUILAS ASSETCO LLC

Cum Oil

1.1M BBL

Cum Gas

2.1M MCF

casinghead

Wells

8

Production

2011-12 — 2026-04

Peak Month

2023-10

Production History

Cum Oil: 1,096,918 BBL Cum Gas: 2,145,971 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

32,811 BBL/mo

Di (annual)

73.5%

b-factor

0.2

EUR

669,247 BBL

R-squared

0.689

type

hyperbolic

Operator History (from monthly production reports)

2022-09 — 2026-07 DEVON ENERGY PRODUCTION CO, L.P. 47 mo
2021-05 — 2022-08 VALIDUS NRG AQUILAS ASSETCO LLC 16 mo
2020-02 — 2021-04 OVINTIV USA INC. 15 mo
2014-07 — 2020-01 ENCANA OIL & GAS(USA) INC. 67 mo
2013-07 — 2014-06 FREEPORT-MCMORAN OIL & GAS LLC 12 mo
2011-12 — 2013-06 PLAINS EXPLORATION & PROD. CO. 19 mo

Wells (8)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4HDEVON ENERGY PRODUCTION CO, L.P.114,0002023-01-23
5HDEVON ENERGY PRODUCTION CO, L.P.114,0002023-01-23
6HDEVON ENERGY PRODUCTION CO, L.P.114,0002023-01-23
7HDEVON ENERGY PRODUCTION CO, L.P.114,0002023-01-23
9HDEVON ENERGY PRODUCTION CO, L.P.114,0002023-01-23
3HDEVON ENERGY PRODUCTION CO, L.P.113,7002011-12-15
2HDEVON ENERGY PRODUCTION CO, L.P.113,7002011-10-07
1HDEVON ENERGY PRODUCTION CO, L.P.113,7002011-10-06