HILL - MAYO BROWN UNIT

Oil · District 8A · Lease #68627

Operator: SCHALK OIL COMPANY, INC.

Cum Oil

52k BBL

Cum Gas

1k MCF

casinghead

Wells

1

Production

2003-11 — 2026-04

Peak Month

2003-11

Production History

Cum Oil: 52,178 BBL Cum Gas: 1,029 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

978 BBL/mo

Di (annual)

35.1%

b-factor

0.4

EUR

53,267 BBL

R-squared

0.854

type

hyperbolic

Operator History (from monthly production reports)

2003-11 — 2026-07 SCHALK OIL COMPANY, INC. 273 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1SCHALK OIL COMPANY, INC.25,2002003-09-30