JOHNSTON, ANNIE

Oil · District 7B · Lease #4970

Operator: ASHTOLA EXPLORATION COMPANY,INC.

Cum Oil

36k BBL

Cum Gas

230 MCF

casinghead

Wells

4

Production

1993-01 — 2008-11

Peak Month

1993-03

Production History

Cum Oil: 35,819 BBL Cum Gas: 230 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

379 BBL/mo

Di (annual)

13.5%

b-factor

0.0

EUR

33,589 BBL

R-squared

0.381

type

exponential

Operator History (from monthly production reports)

1993-01 — 2019-02 ASHTOLA EXPLORATION COMPANY,INC. 314 mo

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
5ASHTOLA EXPLORATION COMPANY INC.14,9991986-01-20
2ASHTOLA EXPLORATION COMPANY INC.14,9991985-09-19
142-447-02781ASHTOLA EXPLORATION COMPANY INC.------
1 C42-447-02781ASHTOLA EXPLORATION COMPANY INC.------