HALFMANN 36

Oil · District 08 · Lease #44451

Operator: OVINTIV USA INC.

Fields: SPRABERRY (TREND AREA)

Cum Oil

92k BBL

Cum Gas

325k MCF

casinghead

Wells

5

Production

2013-10 — 2025-09

Peak Month

2014-06

Production History

Cum Oil: 91,796 BBL Cum Gas: 324,613 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

2,791 BBL/mo

Di (annual)

46.7%

b-factor

0.1

EUR

79,660 BBL

R-squared

0.855

type

hyperbolic

Operator History (from monthly production reports)

2020-02 — 2026-07 OVINTIV USA INC. 78 mo

2015-02 — 2020-01 ENCANA OIL & GAS(USA) INC. 60 mo

2014-01 — 2015-01 ATHLON HOLDINGS LP 13 mo

2013-10 — 2013-12 ATHLON FE OPERATING LLC 3 mo

Wells (5)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
1D	42-173-31736	EXXON CORP.	2	10,200	2014-05-08
8	42-173-36470	OVINTIV USA INC.	1	10,250	2014-04-04
7	42-173-36209	FED OPERATING LLC	1	10,300	2014-01-06
6	42-173-36039	OVINTIV USA INC.	1	10,200	2013-09-04
1	42-173-35926	OVINTIV USA INC.	1	10,300	2013-07-01