SHAFFER, W. S. -B-

Oil // district 8 // lease#11127

op: TCS PETROLEUM CO., LLC

cum_oil

111k BBL

cum_gas

0 MCF

wells

6

production

1993-01 — 2026-03

peak_month

1993-03

-- production_history

cum_oil: 110,915 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

977 BBL/mo

Di (annual)

12.8%

b-factor

0.0

EUR

91,603 BBL

R-squared

0.472

type

exponential

-- wells (6)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
6PRESLEY PROD INVESTMENTS, LLC12,9202021-07-23
1PRESLEY PROD INVESTMENTS, LLC12,9022021-04-30
9TOMPKINS,J.D.OPERATING ACCT.INC.12,9901977-06-20
342-441-30150--------
442-441-30166--------
542-441-30180--------
EOF // data source: Texas Railroad Commission // 2026