STONE "40"

Oil · District 08 · Lease #39817

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

191k BBL

Cum Gas

464k MCF

casinghead

Wells

6

Production

2009-12 — 2025-09

Peak Month

2014-07

Production History

Cum Oil: 190,738 BBL Cum Gas: 464,077 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

3,645 BBL/mo

Di (annual)

32.9%

b-factor

0.0

EUR

132,819 BBL

R-squared

0.814

type

exponential

Operator History (from monthly production reports)

2009-12 — 2026-07 PIONEER NATURAL RES. USA, INC. 200 mo

Wells (6)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
5PIONEER NATURAL RES. USA INC.110,8002013-10-02
7PIONEER NATURAL RES. USA INC.111,3002013-05-15
4PIONEER NATURAL RES. USA INC.111,6002012-07-26
3PIONEER NATURAL RES. USA INC.110,6002011-08-12
2PIONEER NATURAL RES. USA INC.110,8002010-05-19
1PIONEER NATURAL RES. USA INC.210,6002008-11-20