SAND HILLS TUBB UNIT

Oil · District 08 · Lease #20865

Operator: VANGUARD PERMIAN, LLC

Cum Oil

2.1M BBL

Cum Gas

4.2M MCF

casinghead

Wells

80

Production

1993-01 — 2026-04

Peak Month

1993-03

Production History

Cum Oil: 2,145,720 BBL Cum Gas: 4,231,137 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

13,322 BBL/mo

Di (annual)

15.4%

b-factor

0.0

EUR

1,038,039 BBL

R-squared

0.896

type

exponential

Operator History (from monthly production reports)

2023-11 — 2026-07 FORMENTERA OPERATIONS LLC 33 mo
2022-07 — 2023-10 SLANT OPERATING, LLC 16 mo
2022-01 — 2022-06 CONTANGO RESOURCES, LLC 6 mo
2021-02 — 2021-12 CONTANGO RESOURCES, INC. 11 mo
2019-09 — 2021-01 GRIZZLY OP OF DELAWARE, LLC 17 mo
2015-05 — 2019-08 VANGUARD OPERATING, LLC 52 mo
2012-04 — 2015-04 VANGUARD PERMIAN, LLC 37 mo
2009-09 — 2012-03 ENCORE ENERGY PARTNERS OPER LLC 31 mo
2004-05 — 2009-08 ENCORE OPERATING, L.P. 64 mo
2002-08 — 2004-04 CORTEZ OPERATING COMPANY 21 mo
2002-04 — 2002-07 HOME-STAKE OIL & GAS COMPANY 4 mo
2000-06 — 2002-03 PURE RESOURCES, L.P. 22 mo
1996-11 — 2000-05 TITAN RESOURCES I, INC. 43 mo
1993-01 — 1996-10 MOBIL PRODUCING TX. & N.M. INC. 46 mo

Wells (80)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
86FORMENTERA OPERATIONS LLC25,2002023-09-11
59FORMENTERA OPERATIONS LLC25,0002023-08-11
66FORMENTERA OPERATIONS LLC25,0002023-07-19
103FORMENTERA OPERATIONS LLC25,1782023-06-29
18FORMENTERA OPERATIONS LLC14,8102023-03-17
92FORMENTERA OPERATIONS LLC45,6002023-02-24
51FORMENTERA OPERATIONS LLC25,0002023-02-14
85FORMENTERA OPERATIONS LLC25,2002023-01-27
80FORMENTERA OPERATIONS LLC25,2002023-01-09
56FORMENTERA OPERATIONS LLC35,0002022-12-13
81FORMENTERA OPERATIONS LLC25,2002022-11-21
7FORMENTERA OPERATIONS LLC14,5932022-11-18
0091FORMENTERA OPERATIONS LLC35,1002022-10-13
91FORMENTERA OPERATIONS LLC35,1002022-10-13
60FORMENTERA OPERATIONS LLC46,4002022-09-30
9FORMENTERA OPERATIONS LLC14,6912005-08-15
107FORMENTERA OPERATIONS LLC15,1002005-03-30
102FORMENTERA OPERATIONS LLC15,1002005-03-29
93FORMENTERA OPERATIONS LLC25,2352005-03-29
46FORMENTERA OPERATIONS LLC24,8502005-02-04
29FORMENTERA OPERATIONS LLC14,6002004-09-07
22FORMENTERA OPERATIONS LLC24,8002004-09-03
42WFORMENTERA OPERATIONS LLC34,9002004-08-30
84FORMENTERA OPERATIONS LLC15,2002004-04-26
87FORMENTERA OPERATIONS LLC15,2002004-04-26
88FORMENTERA OPERATIONS LLC15,2002004-04-26
90FORMENTERA OPERATIONS LLC15,2002004-04-22
82FORMENTERA OPERATIONS LLC15,2002004-04-21
68FORMENTERA OPERATIONS LLC14,8002001-02-09
69FORMENTERA OPERATIONS LLC14,8002001-01-10
70FORMENTERA OPERATIONS LLC14,8002001-01-10
71FORMENTERA OPERATIONS LLC24,8002001-01-10
72FORMENTERA OPERATIONS LLC14,8002001-01-10
73FORMENTERA OPERATIONS LLC14,8002001-01-10
67WFORMENTERA OPERATIONS LLC14,8001998-11-18
65FORMENTERA OPERATIONS LLC15,0001995-07-03
41FORMENTERA OPERATIONS LLC14,4001995-04-19
52FORMENTERA OPERATIONS LLC25,0001994-10-14
48FORMENTERA OPERATIONS LLC25,0001994-10-10
49FORMENTERA OPERATIONS LLC45,0001991-10-30
53FORMENTERA OPERATIONS LLC25,0001989-10-02
10WFORMENTERA OPERATIONS LLC14,7001987-07-24
57FORMENTERA OPERATIONS LLC15,0001987-03-20
58FORMENTERA OPERATIONS LLC15,0001987-03-20
4FORMENTERA OPERATIONS LLC15,0001984-06-21
54FORMENTERA OPERATIONS LLC15,0001983-08-01
55FORMENTERA OPERATIONS LLC15,0001983-08-01
55WFORMENTERA OPERATIONS LLC15,0001983-08-01
50FORMENTERA OPERATIONS LLC15,0001983-01-21
47FORMENTERA OPERATIONS LLC15,0001982-04-15
1142-103-03587FORMENTERA OPERATIONS LLC------
1242-103-03611FORMENTERA OPERATIONS LLC------
1342-103-03629FORMENTERA OPERATIONS LLC------
15W42-103-03590FORMENTERA OPERATIONS LLC------
1642-103-03591FORMENTERA OPERATIONS LLC------
17W42-103-03595FORMENTERA OPERATIONS LLC------
19W42-103-03593FORMENTERA OPERATIONS LLC------
1L42-103-03581FORMENTERA OPERATIONS LLC------
2042-103-03592FORMENTERA OPERATIONS LLC------
21W42-103-03601FORMENTERA OPERATIONS LLC------
23W42-103-03598FORMENTERA OPERATIONS LLC------
2442-103-03600FORMENTERA OPERATIONS LLC------
25W42-103-03871FORMENTERA OPERATIONS LLC------
2642-103-03625FORMENTERA OPERATIONS LLC------
27W42-103-03626FORMENTERA OPERATIONS LLC------
2842-103-03628FORMENTERA OPERATIONS LLC------
2W42-103-03583FORMENTERA OPERATIONS LLC------
342-103-03586FORMENTERA OPERATIONS LLC------
3042-103-82540FORMENTERA OPERATIONS LLC------
31W42-103-03602FORMENTERA OPERATIONS LLC------
3242-103-03603FORMENTERA OPERATIONS LLC------
3342-103-82542FORMENTERA OPERATIONS LLC------
3442-103-03870FORMENTERA OPERATIONS LLC------
35W42-103-03604FORMENTERA OPERATIONS LLC------
37W42-103-30058FORMENTERA OPERATIONS LLC------
3842-103-03617FORMENTERA OPERATIONS LLC------
4042-103-30169FORMENTERA OPERATIONS LLC------
43W42-103-30280FORMENTERA OPERATIONS LLC------
44W42-103-30356FORMENTERA OPERATIONS LLC------
842-103-03585FORMENTERA OPERATIONS LLC------