MCMILLAN SAND UNIT

Oil · District 7B · Lease #13723

Operator: SCHKADE BROS. OPERATING COMPANY

Cum Oil

222k BBL

Cum Gas

34 MCF

casinghead

Wells

23

Production

1993-01 — 2018-08

Peak Month

2003-01

Production History

Cum Oil: 221,907 BBL Cum Gas: 34 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,099 BBL/mo

Di (annual)

12.1%

b-factor

0.0

EUR

108,638 BBL

R-squared

0.801

type

exponential

Operator History (from monthly production reports)

1993-01 — 2020-07 SCHKADE BROS. OPERATING COMPANY 331 mo

Wells (23)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
203SCHKADE BROS. OPERATING COMPANY12,8002000-06-02
506SCHKADE BROS. OPERATING COMPANY12,7501980-11-13
1WSSCHKADE BROS. OPERATING COMPANY12,6001978-11-14
10142-441-03143SCHKADE BROS. OPERATING COMPANY------
10242-441-02503SCHKADE BROS. OPERATING COMPANY------
10342-441-81533SCHKADE BROS. OPERATING COMPANY------
10442-441-81534SCHKADE BROS. OPERATING COMPANY------
10642-441-20103SCHKADE BROS. OPERATING COMPANY------
10742-441-81537SCHKADE BROS. OPERATING COMPANY------
20142-441-02691SCHKADE BROS. OPERATING COMPANY------
20242-441-81539SCHKADE BROS. OPERATING COMPANY------
20442-441-20372SCHKADE BROS. OPERATING COMPANY------
20542-441-20373SCHKADE BROS. OPERATING COMPANY------
30142-441-81542TEXAS AMERICAN OIL CORP.------
40142-441-04651SCHKADE BROS. OPERATING COMPANY------
40242-441-20171SCHKADE BROS. OPERATING COMPANY------
40342-441-20353SCHKADE BROTHERS DRILLING CO.------
40442-441-20354SCHKADE BROS. OPERATING COMPANY------
40542-441-20166SCHKADE BROS. OPERATING COMPANY------
40642-441-20351SCHKADE BROS. OPERATING COMPANY------
40742-441-00054SCHKADE BROS. OPERATING COMPANY------
50242-441-20383SCHKADE BROS. OPERATING COMPANY------
50442-441-20385SOJOURNER DRILLING CORPORATION------