DARWIN "22"

Oil · District 08 · Lease #41965

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

77k BBL

Cum Gas

114k MCF

casinghead

Wells

2

Production

2011-10 — 2026-04

Peak Month

2013-02

Production History

Cum Oil: 76,516 BBL Cum Gas: 113,581 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,750 BBL/mo

Di (annual)

87.5%

b-factor

0.9

EUR

80,869 BBL

R-squared

0.659

type

hyperbolic

Operator History (from monthly production reports)

2011-10 — 2026-07 PIONEER NATURAL RES. USA, INC. 178 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2PIONEER NATURAL RES. USA, INC.111,4702012-02-23
1PIONEER NATURAL RES. USA, INC.110,6752011-04-28