HEFFERNAN A UNIT

Oil · District 01 · Lease #17001

Operator: EOG RESOURCES, INC.

Cum Oil

498k BBL

Cum Gas

323k MCF

casinghead

Wells

2

Production

2013-06 — 2026-04

Peak Month

2013-08

Production History

Cum Oil: 497,582 BBL Cum Gas: 322,730 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

13,323 BBL/mo

Di (annual)

48.2%

b-factor

0.3

EUR

470,582 BBL

R-squared

0.924

type

hyperbolic

Operator History (from monthly production reports)

2013-06 — 2026-07 EOG RESOURCES, INC. 158 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1HEOG RESOURCES, INC.19,8002013-03-07
2HEOG RESOURCES, INC.19,8002013-03-07