SPENCER

Oil · District 7C · Lease #13721

Operator: GEOSURVEYS, INC.

Cum Oil

411k BBL

Cum Gas

123k MCF

casinghead

Wells

10

Production

1994-12 — 2026-04

Peak Month

1995-06

Production History

Cum Oil: 410,654 BBL Cum Gas: 123,029 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

4,243 BBL/mo

Di (annual)

46.1%

b-factor

0.9

EUR

319,906 BBL

R-squared

0.377

type

hyperbolic

Operator History (from monthly production reports)

2018-05 — 2026-07 FELDERHOFF PRODUCTION COMPANY 99 mo
1994-12 — 2018-04 GEOSURVEYS, INC. 281 mo

Wells (10)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
10FELDERHOFF PRODUCTION COMPANY11,5002005-02-14
9FELDERHOFF PRODUCTION COMPANY11,3002003-09-30
8FELDERHOFF PRODUCTION COMPANY11,3002002-04-26
4FELDERHOFF PRODUCTION COMPANY11,3002001-06-25
7FELDERHOFF PRODUCTION COMPANY11,2502001-06-25
2FELDERHOFF PRODUCTION COMPANY21,4001999-11-18
6FELDERHOFF PRODUCTION COMPANY21,8001996-12-16
5FELDERHOFF PRODUCTION COMPANY11,4001995-05-08
3FELDERHOFF PRODUCTION COMPANY11,4001994-12-27
1FELDERHOFF PRODUCTION COMPANY11,4001994-11-30