SPANISH TRAIL 3-10 A11

Oil · District 08 · Lease #59581

Operator: COG OPERATING LLC

Cum Oil

18k BBL

Cum Gas

549k MCF

casinghead

Wells

1

Production

2023-04 — 2026-04

Peak Month

2025-05

Production History

Cum Oil: 17,556 BBL Cum Gas: 549,103 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,013 BBL/mo

Di (annual)

90.7%

b-factor

0.2

EUR

16,696 BBL

R-squared

0.885

type

hyperbolic

Operator History (from monthly production reports)

2023-04 — 2026-07 COG OPERATING LLC 40 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3491HCOG OPERATING LLC212,0002018-12-31