COFFIELD, H. H. -B-

Oil · District 01 · Lease #1238

Operator: SIERRA MINERALS, INC.

Cum Oil

210 BBL

Cum Gas

0 MCF

Wells

10

Production

1993-01 — 1998-12

Peak Month

1997-10

Production History

Cum Oil: 210 BBL Cum Gas: 0 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

21 BBL/mo

Di (annual)

191.9%

b-factor

0.0

EUR

127 BBL

R-squared

0.775

type

exponential

Operator History (from monthly production reports)

1995-12 — 2026-07 SIERRA MINERALS, INC. 368 mo
1995-10 — 1995-11 BIG SPRINGS ENERGY GROUP, INC. 2 mo
1993-01 — 1995-09 NELSON, BUDDY B. 33 mo

Wells (10)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
10SIERRA MINERALS INC.11,0001981-08-20
9SIERRA MINERALS INC.11,0001981-06-02
6SIERRA MINERALS INC.17001979-07-12
7SIERRA MINERALS INC.17001979-07-12
8SIERRA MINERALS INC.17001979-07-12
142-331-00151SIERRA MINERALS INC.------
242-331-00152SIERRA MINERALS INC.------
342-331-00150SIERRA MINERALS INC.------
442-331-80158SIERRA MINERALS INC.------
542-331-30175SIERRA MINERALS INC.------