BIGBY -B-

Oil · District 08 · Lease #23421

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

80k BBL

Cum Gas

126k MCF

casinghead

Wells

3

Production

1993-01 — 2023-05

Peak Month

2017-10

Production History

Cum Oil: 80,192 BBL Cum Gas: 126,297 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,653 BBL/mo

Di (annual)

129.2%

b-factor

1.1

EUR

72,984 BBL

R-squared

0.322

type

hyperbolic

Operator History (from monthly production reports)

2021-06 — 2026-07 PIONEER NATURAL RES. USA, INC. 62 mo
2018-08 — 2021-05 DE3 OPERATING LLC 34 mo
2003-10 — 2018-07 JM COX RESOURCES, L.P. 178 mo
1993-01 — 2003-09 COX, JOHN L. 129 mo

Wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3PIONEER NATURAL RES. USA INC.112,0002015-10-06
142-173-30164PIONEER NATURAL RES. USA INC.------
242-173-30203PIONEER NATURAL RES. USA INC.------