THUNDER C20-13

Oil · District 08 · Lease #45145

Operator: COTERRA ENERGY OPERATING CO.

Cum Oil

471k BBL

Cum Gas

2.1M MCF

casinghead

Wells

2

Production

2014-02 — 2026-04

Peak Month

2014-04

Production History

Cum Oil: 471,163 BBL Cum Gas: 2,147,874 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

6,358 BBL/mo

Di (annual)

22.3%

b-factor

0.0

EUR

341,616 BBL

R-squared

0.396

type

exponential

Operator History (from monthly production reports)

2025-11 — 2026-07 COTERRA ENERGY OPERATING CO. 9 mo
2014-02 — 2025-10 CIMAREX ENERGY CO. 141 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2HCOTERRA ENERGY OPERATING CO.112,2402014-05-31
1HCOTERRA ENERGY OPERATING CO.211,0172013-10-29