HEARD, J. F. B.

Oil · District 02 · Lease #3978

Operator: PRIMROSE OPERATING COMPANY

Fields: GRETA (4400)

Cum Oil

869k BBL

Cum Gas

1.8M MCF

casinghead

Wells

17

Production

1993-01 — 2026-04

Peak Month

1993-12

Production History

Cum Oil: 869,300 BBL Cum Gas: 1,826,913 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

4,203 BBL/mo

Di (annual)

7.5%

b-factor

0.4

EUR

839,224 BBL

R-squared

0.670

type

hyperbolic

Operator History (from monthly production reports)

2020-12 — 2026-07 DORCHESTER OPERATING COMPANY LLC 68 mo
2010-11 — 2020-11 ACOCK/ANAQUA OPERATING CO., LP 121 mo
2007-10 — 2010-10 CAMBRIAN MANAGEMENT, LTD. 37 mo
2007-04 — 2007-09 CAMBRIAN MANAGEMENT LTD 6 mo
2001-11 — 2007-03 PRIMROSE OPERATING COMPANY 65 mo
2000-04 — 2001-10 EXXON MOBIL CORPORATION 19 mo
1993-01 — 2000-03 EXXON CORP. 87 mo

Wells (17)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
8DORCHESTER OPERATING COMPANY LLC14,3822013-10-10
3DORCHESTER OPERATING COMPANY LLC44,3841997-05-12
22DORCHESTER OPERATING COMPANY LLC25,0001994-01-31
16DDORCHESTER OPERATING COMPANY LLC14,3881991-10-28
29DORCHESTER OPERATING COMPANY LLC14,9861984-08-23
26DORCHESTER OPERATING COMPANY LLC14,9801984-03-21
24DORCHESTER OPERATING COMPANY LLC14,9401983-08-02
20DDORCHESTER OPERATING COMPANY LLC14,4041977-08-30
1042-391-00869DORCHESTER OPERATING COMPANY LLC------
1142-391-00870DORCHESTER OPERATING COMPANY LLC------
1242-391-00871DORCHESTER OPERATING COMPANY LLC------
1342-391-00872DORCHESTER OPERATING COMPANY LLC------
1442-391-00873DORCHESTER OPERATING COMPANY LLC------
1542-391-00874DORCHESTER OPERATING COMPANY LLC------
242-391-00861DORCHESTER OPERATING COMPANY LLC------
21 T42-391-00880DORCHESTER OPERATING COMPANY LLC------
642-391-00865DORCHESTER OPERATING COMPANY LLC------