BARFIELD 8 -A-

Oil // district 10 // lease#31499

op: PIONEER NATURAL RES. USA, INC.

cum_oil

2k BBL

cum_gas

0 MCF

wells

2

production

1993-01 — 2025-10

peak_month

1993-07

-- production_history

cum_oil: 2,411 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

128 BBL/mo

Di (annual)

112.5%

b-factor

0.3

EUR

1,893 BBL

R-squared

0.672

type

hyperbolic

-- wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1MWJ PRODUCING COMPANY210,5501987-11-18
1 CMWJ PRODUCING COMPANY210,5501987-11-18
EOF // data source: Texas Railroad Commission // 2026