PENA CREEK UNIT

Oil · District 01 · Lease #6557

Operator: TXCO RESOURCES INC.

Cum Oil

1.3M BBL

Cum Gas

105k MCF

casinghead

Wells

157

Production

1993-01 — 2026-02

Peak Month

1994-10

Production History

Cum Oil: 1,278,191 BBL Cum Gas: 104,815 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

6,672 BBL/mo

Di (annual)

5.8%

b-factor

0.0

EUR

1,310,635 BBL

R-squared

0.730

type

exponential

Operator History (from monthly production reports)

2025-12 — 2026-07 ATLAS OPERATING LLC 8 mo
2019-04 — 2025-11 FLINT OAK ENERGY, LLC 80 mo
2011-09 — 2019-03 ENERGYQUEST II, LLC 91 mo
2010-03 — 2011-08 NEWFIELD EXPLORATION COMPANY 18 mo
2007-07 — 2010-02 TXCO RESOURCES INC. 32 mo
2002-04 — 2007-06 EXPLORATION COMPANY, THE 63 mo
1996-01 — 2002-03 MERIT ENERGY COMPANY 75 mo
1993-01 — 1995-12 CONOCO INC. 36 mo

Wells (157)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
173ATLAS OPERATING LLC14,0002008-06-25
196ATLAS OPERATING LLC13,6002008-06-21
232ATLAS OPERATING LLC14,0002008-06-21
197ATLAS OPERATING LLC13,6002008-06-13
100ATLAS OPERATING LLC23,6002007-03-15
138ATLAS OPERATING LLC13,6002007-03-15
139ATLAS OPERATING LLC13,6002007-03-15
140ATLAS OPERATING LLC13,6002007-03-15
141ATLAS OPERATING LLC13,6002007-03-15
92ATLAS OPERATING LLC13,6002007-03-15
94ATLAS OPERATING LLC13,6002007-03-15
97ATLAS OPERATING LLC13,6002007-03-15
98ATLAS OPERATING LLC13,6002007-03-15
99ATLAS OPERATING LLC13,6002007-03-15
136ATLAS OPERATING LLC13,4002006-07-20
137ATLAS OPERATING LLC13,4002006-07-20
91ATLAS OPERATING LLC13,6002006-06-21
133ATLAS OPERATING LLC13,6002006-06-05
134ATLAS OPERATING LLC13,6002006-06-05
178ATLAS OPERATING LLC13,6002006-05-26
231ATLAS OPERATING LLC13,6002006-05-17
230ATLAS OPERATING LLC13,6002006-05-08
217ATLAS OPERATING LLC13,6002005-06-17
159ATLAS OPERATING LLC13,6002005-05-24
96ATLAS OPERATING LLC13,6002005-05-24
135ATLAS OPERATING LLC13,6002005-05-13
132ATLAS OPERATING LLC13,6002005-05-04
186ATLAS OPERATING LLC13,6002004-07-30
131ATLAS OPERATING LLC13,6002004-07-19
170ATLAS OPERATING LLC13,6002004-07-08
130ATLAS OPERATING LLC13,6002004-06-23
167ATLAS OPERATING LLC13,6002004-06-23
163ATLAS OPERATING LLC13,6002004-06-15
88ATLAS OPERATING LLC13,6002004-05-14
86ATLAS OPERATING LLC13,6002004-05-13
87ATLAS OPERATING LLC13,6002004-05-13
153ATLAS OPERATING LLC13,6002004-05-03
85ATLAS OPERATING LLC13,6002003-10-24
83ATLAS OPERATING LLC13,6002003-10-06
57ATLAS OPERATING LLC23,3622003-10-01
84ATLAS OPERATING LLC13,6002003-09-23
128ATLAS OPERATING LLC13,6002003-09-17
82ATLAS OPERATING LLC13,6002003-07-22
80ATLAS OPERATING LLC13,6002003-06-19
81ATLAS OPERATING LLC13,6002003-06-19
77ATLAS OPERATING LLC13,6002003-03-20
127ATLAS OPERATING LLC13,6002003-03-18
211ATLAS OPERATING LLC13,6002003-03-18
75ATLAS OPERATING LLC13,6002003-03-18
78ATLAS OPERATING LLC13,6002003-03-18
79ATLAS OPERATING LLC13,6002003-03-18
76ATLAS OPERATING LLC13,6002003-01-23
305ATLAS OPERATING LLC23,1001995-02-15
123ATLAS OPERATING LLC13,5501989-05-16
125ATLAS OPERATING LLC13,5501989-05-16
126ATLAS OPERATING LLC13,5501989-05-16
209ATLAS OPERATING LLC13,5501989-05-16
210ATLAS OPERATING LLC13,5501989-05-16
64ATLAS OPERATING LLC13,5501989-05-16
65ATLAS OPERATING LLC13,5501989-05-16
66ATLAS OPERATING LLC23,5501989-05-16
67ATLAS OPERATING LLC13,5501989-05-16
68ATLAS OPERATING LLC13,5501989-05-16
69ATLAS OPERATING LLC13,5501989-05-16
70ATLAS OPERATING LLC13,5501989-05-16
71ATLAS OPERATING LLC13,5501989-05-16
72ATLAS OPERATING LLC13,5501989-05-16
73ATLAS OPERATING LLC13,5501989-05-16
74ATLAS OPERATING LLC13,5501989-05-16
124ATLAS OPERATING LLC13,5501987-11-16
61ATLAS OPERATING LLC13,7001986-07-16
63ATLAS OPERATING LLC13,7001986-07-16
122ATLAS OPERATING LLC13,7001986-03-03
62ATLAS OPERATING LLC13,7001986-03-03
121ATLAS OPERATING LLC14,0001984-10-16
60ATLAS OPERATING LLC14,0001984-10-16
120ATLAS OPERATING LLC14,0001984-09-18
208ATLAS OPERATING LLC14,0001984-09-18
58ATLAS OPERATING LLC15,2951983-12-30
59ATLAS OPERATING LLC13,6001983-12-30
301ATLAS OPERATING LLC13,1001981-10-02
302ATLAS OPERATING LLC13,1001981-10-02
56ATLAS OPERATING LLC13,3301980-10-16
55ATLAS OPERATING LLC13,3101980-10-03
4WATLAS OPERATING LLC13,2901980-10-01
54ATLAS OPERATING LLC27,4001980-01-22
21WATLAS OPERATING LLC23,2681979-12-11
24ATLAS OPERATING LLC23,2841979-12-11
1042-127-30653CONOCO INC.------
10142-127-30452CONOCO INC.------
102W42-127-30473ATLAS OPERATING LLC------
10542-127-30504ATLAS OPERATING LLC------
10642-127-30647CONOCO INC.------
10742-127-30670CONOCO INC.------
10842-127-30678CONOCO INC.------
10942-127-30681CONOCO INC.------
11042-127-30684CONOCO INC.------
111W42-127-30688ATLAS OPERATING LLC------
112W42-127-30685CONOCO INC.------
11342-127-30723CONOCO INC.------
11442-127-30729CONOCO INC.------
11542-127-80818ATLAS OPERATING LLC------
11642-127-30737CONOCO INC.------
11742-127-80820ATLAS OPERATING LLC------
11842-127-30790CONOCO INC.------
11942-127-30801CONOCO INC.------
11W42-127-30654ATLAS OPERATING LLC------
1242-127-30650ATLAS OPERATING LLC------
1342-127-30667CONOCO INC.------
1442-127-30669CONOCO INC.------
1542-127-30680CONOCO INC.------
16W42-127-30683ATLAS OPERATING LLC------
1742-127-30686CONOCO INC.------
1842-127-30696CONOCO INC.------
1942-127-30701ATLAS OPERATING LLC------
242-127-30489CONOCO INC.------
2042-127-30700CONOCO INC.------
20142-127-30666CONOCO INC.------
20242-127-30679ATLAS OPERATING LLC------
20342-127-30698CONOCO INC.------
204W42-127-30768ATLAS OPERATING LLC------
20542-127-30792CONOCO INC.------
20642-127-30882CONOCO INC.------
20742-127-30883CONOCO INC.------
22W42-127-30708ATLAS OPERATING LLC------
2542-127-30716CONOCO INC.------
26W42-127-30733ATLAS OPERATING LLC------
27W42-127-30742ATLAS OPERATING LLC------
2842-127-30756CONOCO INC.------
2942-127-30759CONOCO INC.------
342-127-30583CONOCO INC.------
30W42-127-30772ATLAS OPERATING LLC------
32W42-127-30770ATLAS OPERATING LLC------
33W42-127-30774ATLAS OPERATING LLC------
3442-127-30791CONOCO INC.------
3542-127-30793CONOCO INC.------
3642-127-30800CONOCO INC.------
37W42-127-30804ATLAS OPERATING LLC------
3942-127-30823CONOCO INC.------
4042-127-30822CONOCO INC.------
4142-127-30821CONOCO INC.------
4242-127-30820ATLAS OPERATING LLC------
43W42-127-30819ATLAS OPERATING LLC------
44W42-127-30836ATLAS OPERATING LLC------
4542-127-30834CONOCO INC.------
46W42-127-30835ATLAS OPERATING LLC------
4742-127-30849CONOCO INC.------
48W42-127-30850ATLAS OPERATING LLC------
4942-127-80797ATLAS OPERATING LLC------
542-127-30622CONOCO INC.------
5142-127-30872CONOCO INC.------
5242-127-30871CONOCO INC.------
53W42-127-31046ATLAS OPERATING LLC------
6W42-127-30641ATLAS OPERATING LLC------
742-127-30643CONOCO INC.------
842-127-30645CONOCO INC.------
942-127-30655CONOCO INC.------