RICHEY SEC. 42 "A"

Oil // district 9 // lease#8491

op: PIONEER NATURAL RES. USA, INC.

cum_oil

51k BBL

cum_gas

0 MCF

wells

9

production

1993-01 — 2026-03

peak_month

2007-03

-- production_history

cum_oil: 51,451 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

858 BBL/mo

Di (annual)

46.1%

b-factor

0.2

EUR

27,785 BBL

R-squared

0.889

type

hyperbolic

-- wells (9)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
13PIONEER NATURAL RES. USA, INC.17,5002006-08-31
9PIONEER NATURAL RES. USA, INC.17,4002006-04-20
10PIONEER NATURAL RES. USA, INC.17,4002006-04-19
7PIONEER NATURAL RES. USA, INC.17,3002005-11-18
8PIONEER NATURAL RES. USA, INC.17,4252005-11-10
4INDIAN WELLS OIL COMPANY17,4001981-02-18
3INDIAN WELLS OIL COMPANY17,4001980-11-05
2INDIAN WELLS OIL COMPANY17,3001980-02-05
542-235-31835--------
EOF // multi-state drilling data platform // 2026