MANFORD

Oil · District 01 · Lease #5821

Operator: SERRA ENERGY, INC.

Fields: DARST CREEK (BUDA)

Cum Oil

4k BBL

Cum Gas

13k MCF

casinghead

Wells

4

Production

1993-01 — 1999-12

Peak Month

1994-11

Production History

Cum Oil: 4,095 BBL Cum Gas: 12,669 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

97 BBL/mo

Di (annual)

32.8%

b-factor

0.0

EUR

3,516 BBL

R-squared

0.359

type

exponential

Operator History (from monthly production reports)

1999-08 — 2022-07 CALTEX ENERGY CO. 131 mo

1997-05 — 1999-07 AXIS ENERGY CORPORATION 27 mo

1993-06 — 1997-04 SERRA ENERGY, INC. 47 mo

1993-01 — 1993-05 ALEGRAR OIL & GAS, INC. 5 mo

Wells (4)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
1SW	42-187-33253	CALTEX ENERGY CO.	1	3,300	1988-02-17
8	42-187-32983	CALTEX ENERGY CO.	1	2,750	1985-04-09
6	42-187-31806	CALTEX ENERGY CO.	1	2,800	1981-08-28
3	42-187-30808	CALTEX ENERGY CO.	1	2,770	1978-04-17