LAKE TRAMMEL UNIT

Oil · District 7B · Lease #8712

Operator: SHENANDOAH PETROLEUM CORPORATION

Fields: LAKE TRAMMEL, W. (CANYON)

Cum Oil

3.9M BBL

Cum Gas

2.1M MCF

casinghead

Wells

203

Production

1993-01 — 2026-04

Peak Month

2011-07

Production History

Cum Oil: 3,853,937 BBL Cum Gas: 2,087,193 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

26,327 BBL/mo

Di (annual)

31.3%

b-factor

1.0

EUR

2,839,844 BBL

R-squared

0.894

type

hyperbolic

Operator History (from monthly production reports)

2024-01 — 2026-07 GRAYROCK ENERGY II, LLC 31 mo

2017-06 — 2023-12 ROVER PETROLEUM OPERATING, LLC 79 mo

2011-12 — 2017-05 MERIT ENERGY COMPANY 66 mo

2009-05 — 2011-11 PLANTATION OPERATING, LLC 31 mo

2004-02 — 2009-04 L.C.S. PRODUCTION COMPANY 63 mo

2003-05 — 2004-01 SHENANDOAH PETROLEUM CORPORATION 9 mo

1995-11 — 2003-04 BROTHERS OPERATING COMPANY INC. 90 mo

1993-01 — 1995-10 ELDORADO OPERATING CO. 34 mo

Wells (203)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
269	42-353-33684	GRAYROCK ENERGY II, LLC	1	6,000	2019-04-12
266	42-353-33683	GRAYROCK ENERGY II, LLC	1	6,000	2019-04-08
262	42-353-33291	GRAYROCK ENERGY II, LLC	2	6,000	2018-12-06
261	42-353-33671	GRAYROCK ENERGY II, LLC	1	6,000	2018-11-02
260	42-353-33670	GRAYROCK ENERGY II, LLC	1	6,000	2018-11-01
61	42-353-01043	GRAYROCK ENERGY II, LLC	1	5,302	2014-07-30
86	42-353-01538	GRAYROCK ENERGY II, LLC	1	5,301	2014-06-18
25	42-353-00422	GRAYROCK ENERGY II, LLC	1	5,230	2014-06-14
140	42-353-32964	GRAYROCK ENERGY II, LLC	4	7,200	2013-10-16
140R	42-353-32964	GRAYROCK ENERGY II, LLC	4	7,200	2013-10-16
22	42-353-01155	GRAYROCK ENERGY II, LLC	2	6,000	2013-08-26
22W	42-353-01155	GRAYROCK ENERGY II, LLC	2	6,000	2013-08-26
51	42-353-01141	GRAYROCK ENERGY II, LLC	2	5,700	2013-07-18
51W	42-353-01141	GRAYROCK ENERGY II, LLC	2	5,700	2013-07-18
1	42-353-01568	GRAYROCK ENERGY II, LLC	1	5,600	2013-03-19
4	42-353-01564	GRAYROCK ENERGY II, LLC	1	5,600	2013-03-07
64	42-353-01144	GRAYROCK ENERGY II, LLC	2	5,500	2013-01-18
64W	42-353-01144	GRAYROCK ENERGY II, LLC	2	5,500	2013-01-18
13	42-353-01046	GRAYROCK ENERGY II, LLC	1	5,800	2013-01-02
45	42-353-01051	GRAYROCK ENERGY II, LLC	1	5,800	2012-12-21
45W	42-353-01051	GRAYROCK ENERGY II, LLC	1	5,800	2012-12-21
75	42-353-01550	GRAYROCK ENERGY II, LLC	1	5,800	2012-12-20
256	42-353-33290	GRAYROCK ENERGY II, LLC	2	6,000	2012-02-06
224	42-353-33280	GRAYROCK ENERGY II, LLC	1	6,000	2011-12-28
220	42-353-33281	GRAYROCK ENERGY II, LLC	1	6,000	2011-12-27
223	42-353-33282	GRAYROCK ENERGY II, LLC	1	6,000	2011-12-27
211	42-353-33276	GRAYROCK ENERGY II, LLC	1	6,000	2011-12-22
226	42-353-33278	GRAYROCK ENERGY II, LLC	1	6,000	2011-12-22
212	42-353-33277	GRAYROCK ENERGY II, LLC	1	6,000	2011-12-21
216	42-353-33274	GRAYROCK ENERGY II, LLC	2	6,000	2011-12-21
219	42-353-33272	GRAYROCK ENERGY II, LLC	2	6,000	2011-12-13
234	42-353-33273	GRAYROCK ENERGY II, LLC	1	6,000	2011-12-13
235	42-353-33270	GRAYROCK ENERGY II, LLC	2	6,000	2011-12-12
221	42-353-33268	GRAYROCK ENERGY II, LLC	2	6,000	2011-12-09
228	42-353-33269	GRAYROCK ENERGY II, LLC	1	6,000	2011-12-09
120	42-353-32939	GRAYROCK ENERGY II, LLC	2	6,000	2011-12-01
254	42-353-33266	GRAYROCK ENERGY II, LLC	2	6,000	2011-11-28
206	42-353-33261	GRAYROCK ENERGY II, LLC	1	6,000	2011-10-27
133	42-353-32959	GRAYROCK ENERGY II, LLC	3	6,000	2011-09-16
243	42-353-33235	GRAYROCK ENERGY II, LLC	1	6,000	2011-09-01
250	42-353-33232	GRAYROCK ENERGY II, LLC	1	6,000	2011-08-17
239	42-353-33227	GRAYROCK ENERGY II, LLC	1	6,000	2011-08-08
233	42-353-33224	GRAYROCK ENERGY II, LLC	1	6,000	2011-08-01
21	42-353-01153	GRAYROCK ENERGY II, LLC	1	5,700	2011-07-11
21W	42-353-01153	GRAYROCK ENERGY II, LLC	1	5,700	2011-07-11
87	42-353-01584	GRAYROCK ENERGY II, LLC	1	5,700	2011-07-11
87W	42-353-01584	GRAYROCK ENERGY II, LLC	1	5,700	2011-07-11
90R	42-353-33222	GRAYROCK ENERGY II, LLC	1	5,700	2011-07-11
204	42-353-33221	GRAYROCK ENERGY II, LLC	1	6,000	2011-07-08
225	42-353-33181	GRAYROCK ENERGY II, LLC	1	6,000	2011-05-18
222	42-353-33182	GRAYROCK ENERGY II, LLC	1	6,000	2011-04-01
200	42-353-33196	GRAYROCK ENERGY II, LLC	1	6,000	2011-03-10
217	42-353-33190	GRAYROCK ENERGY II, LLC	1	6,000	2011-02-25
230	42-353-33191	GRAYROCK ENERGY II, LLC	1	6,000	2011-02-16
33	42-353-01149	GRAYROCK ENERGY II, LLC	1	5,600	2011-02-16
33 W	42-353-01149	GRAYROCK ENERGY II, LLC	1	5,600	2011-02-16
214	42-353-33189	GRAYROCK ENERGY II, LLC	1	6,000	2011-02-08
242	42-353-33188	GRAYROCK ENERGY II, LLC	1	6,000	2011-02-08
237	42-353-33178	GRAYROCK ENERGY II, LLC	1	6,000	2011-01-24
205	42-353-33177	GRAYROCK ENERGY II, LLC	1	6,000	2011-01-19
203	42-353-33184	GRAYROCK ENERGY II, LLC	1	6,000	2011-01-12
55	42-353-01156	GRAYROCK ENERGY II, LLC	1	5,500	2011-01-06
55W	42-353-01156	GRAYROCK ENERGY II, LLC	1	5,500	2011-01-06
73	42-353-01151	GRAYROCK ENERGY II, LLC	1	5,500	2011-01-06
73W	42-353-01151	GRAYROCK ENERGY II, LLC	1	5,500	2011-01-06
32W	42-353-01148	GRAYROCK ENERGY II, LLC	1	5,449	2011-01-04
400	42-353-01170	GRAYROCK ENERGY II, LLC	1	6,417	2011-01-04
238	42-353-33179	GRAYROCK ENERGY II, LLC	1	6,000	2010-12-02
236	42-353-33176	GRAYROCK ENERGY II, LLC	1	6,000	2010-11-29
201	42-353-33131	GRAYROCK ENERGY II, LLC	1	6,000	2010-06-28
202	42-353-33141	GRAYROCK ENERGY II, LLC	1	5,500	2010-05-21
210	42-353-33134	GRAYROCK ENERGY II, LLC	1	6,000	2010-04-28
229	42-353-33132	GRAYROCK ENERGY II, LLC	1	6,000	2010-04-20
114	42-353-33060	GRAYROCK ENERGY II, LLC	1	6,000	2008-09-05
169	42-353-33059	GRAYROCK ENERGY II, LLC	1	6,000	2008-09-02
168	42-353-33043	GRAYROCK ENERGY II, LLC	1	5,999	2008-07-03
163	42-353-32326	GRAYROCK ENERGY II, LLC	2	7,200	2008-05-23
160	42-353-33024	GRAYROCK ENERGY II, LLC	1	6,000	2008-04-26
161	42-353-33025	GRAYROCK ENERGY II, LLC	1	6,000	2008-04-26
159	42-353-33022	GRAYROCK ENERGY II, LLC	2	6,000	2008-04-25
162	42-353-33021	GRAYROCK ENERGY II, LLC	1	6,000	2008-04-25
155	42-353-32998	GRAYROCK ENERGY II, LLC	1	6,000	2007-12-10
154	42-353-32995	GRAYROCK ENERGY II, LLC	1	6,000	2007-11-14
152	42-353-32992	GRAYROCK ENERGY II, LLC	2	6,000	2007-10-19
149	42-353-32986	GRAYROCK ENERGY II, LLC	1	6,000	2007-09-04
150	42-353-32987	GRAYROCK ENERGY II, LLC	1	6,000	2007-09-04
151	42-353-32988	GRAYROCK ENERGY II, LLC	1	6,000	2007-09-04
148	42-353-32979	GRAYROCK ENERGY II, LLC	1	6,000	2007-07-23
144	42-353-32967	GRAYROCK ENERGY II, LLC	1	6,000	2007-05-14
143	42-353-32966	GRAYROCK ENERGY II, LLC	2	6,000	2007-04-23
145	42-353-32968	GRAYROCK ENERGY II, LLC	1	6,000	2007-04-23
131	42-353-32957	GRAYROCK ENERGY II, LLC	1	6,000	2007-04-20
132	42-353-32958	GRAYROCK ENERGY II, LLC	1	6,000	2007-04-20
134	42-353-32960	GRAYROCK ENERGY II, LLC	1	6,000	2007-04-20
142	42-353-32965	GRAYROCK ENERGY II, LLC	2	6,000	2007-04-20
123	42-353-32954	GRAYROCK ENERGY II, LLC	1	6,000	2007-04-09
135	42-353-32953	GRAYROCK ENERGY II, LLC	2	7,200	2007-04-02
146	42-353-32951	GRAYROCK ENERGY II, LLC	1	6,000	2007-04-02
147	42-353-32952	GRAYROCK ENERGY II, LLC	1	6,000	2007-04-02
121	42-353-32949	GRAYROCK ENERGY II, LLC	1	6,000	2007-03-20
126	42-353-32948	GRAYROCK ENERGY II, LLC	1	6,000	2007-03-20
110	42-353-32940	GRAYROCK ENERGY II, LLC	3	6,000	2007-03-16
112	42-353-32941	GRAYROCK ENERGY II, LLC	2	6,000	2007-03-16
124	42-353-32944	GRAYROCK ENERGY II, LLC	2	6,000	2007-03-16
127	42-353-32945	GRAYROCK ENERGY II, LLC	1	6,000	2007-03-16
128	42-353-32946	GRAYROCK ENERGY II, LLC	1	6,000	2007-03-16
130	42-353-32947	GRAYROCK ENERGY II, LLC	1	6,000	2007-03-16
115	42-353-32943	GRAYROCK ENERGY II, LLC	1	6,000	2007-03-15
122	42-353-32942	GRAYROCK ENERGY II, LLC	1	6,000	2007-03-14
119	42-353-32936	GRAYROCK ENERGY II, LLC	1	6,000	2007-02-12
125	42-353-32933	GRAYROCK ENERGY II, LLC	2	6,000	2007-01-12
113	42-353-32931	GRAYROCK ENERGY II, LLC	1	6,000	2006-12-20
116	42-353-32929	GRAYROCK ENERGY II, LLC	1	6,000	2006-12-08
117	42-353-32930	GRAYROCK ENERGY II, LLC	1	6,000	2006-12-08
111	42-353-32928	GRAYROCK ENERGY II, LLC	1	6,000	2006-12-07
118	42-353-32926	GRAYROCK ENERGY II, LLC	1	6,000	2006-11-21
109	42-353-32717	GRAYROCK ENERGY II, LLC	2	7,200	2005-10-11
108	42-353-32597	GRAYROCK ENERGY II, LLC	1	5,500	1997-11-14
107	42-353-32564	GRAYROCK ENERGY II, LLC	1	5,500	1997-06-12
106	42-353-32483	GRAYROCK ENERGY II, LLC	1	5,500	1997-01-24
105	42-353-31930	GRAYROCK ENERGY II, LLC	1	5,700	1986-01-23
104	42-353-31435	GRAYROCK ENERGY II, LLC	1	5,500	1983-04-06
102	42-353-31135	GRAYROCK ENERGY II, LLC	1	5,500	1981-07-01
103	42-353-31136	GRAYROCK ENERGY II, LLC	1	5,500	1981-07-01
101	42-353-31130	GRAYROCK ENERGY II, LLC	1	5,500	1981-06-25
100	42-353-31036	GRAYROCK ENERGY II, LLC	1	5,500	1981-01-14
99	42-353-31037	GRAYROCK ENERGY II, LLC	1	5,500	1981-01-14
98	42-353-31035	GRAYROCK ENERGY II, LLC	1	5,500	1981-01-02
97	42-353-30770	GRAYROCK ENERGY II, LLC	1	5,500	1979-05-02
96	42-353-30745	GRAYROCK ENERGY II, LLC	1	5,500	1978-11-08
95	42-353-30708	GRAYROCK ENERGY II, LLC	1	5,500	1978-01-31
10	42-353-01162	GRAYROCK ENERGY II, LLC	--	--	--
11	42-353-01049	GRAYROCK ENERGY II, LLC	--	--	--
12	42-353-00424	GRAYROCK ENERGY II, LLC	--	--	--
14	42-353-01159	GRAYROCK ENERGY II, LLC	--	--	--
15	42-353-01158	GRAYROCK ENERGY II, LLC	--	--	--
16	42-353-01160	GRAYROCK ENERGY II, LLC	--	--	--
17	42-353-01172	GRAYROCK ENERGY II, LLC	--	--	--
18	42-353-01173	GRAYROCK ENERGY II, LLC	--	--	--
19	42-353-01168	GRAYROCK ENERGY II, LLC	--	--	--
2	42-353-01567	GRAYROCK ENERGY II, LLC	--	--	--
20	42-353-01150	GRAYROCK ENERGY II, LLC	--	--	--
23	42-353-01558	GRAYROCK ENERGY II, LLC	--	--	--
24	42-353-01045	GRAYROCK ENERGY II, LLC	--	--	--
27	42-353-00425	GRAYROCK ENERGY II, LLC	--	--	--
28	42-353-00944	GRAYROCK ENERGY II, LLC	--	--	--
29	42-353-00943	GRAYROCK ENERGY II, LLC	--	--	--
3	42-353-01563	GRAYROCK ENERGY II, LLC	--	--	--
30	42-353-01050	GRAYROCK ENERGY II, LLC	--	--	--
31	42-353-01167	GRAYROCK ENERGY II, LLC	--	--	--
34	42-353-01154	GRAYROCK ENERGY II, LLC	--	--	--
35	42-353-01557	GRAYROCK ENERGY II, LLC	--	--	--
37	42-353-00940	GRAYROCK ENERGY II, LLC	--	--	--
38	42-353-00938	GRAYROCK ENERGY II, LLC	--	--	--
39	42-353-00935	GRAYROCK ENERGY II, LLC	--	--	--
39W	42-353-00935	GRAYROCK ENERGY II, LLC	--	--	--
40	42-353-01422	GRAYROCK ENERGY II, LLC	--	--	--
42	42-353-00934	GRAYROCK ENERGY II, LLC	--	--	--
43	42-353-00936	GRAYROCK ENERGY II, LLC	--	--	--
44	42-353-00941	GRAYROCK ENERGY II, LLC	--	--	--
46	42-353-01157	GRAYROCK ENERGY II, LLC	--	--	--
47	42-353-01555	GRAYROCK ENERGY II, LLC	--	--	--
48	42-353-01553	GRAYROCK ENERGY II, LLC	--	--	--
49	42-353-01147	GRAYROCK ENERGY II, LLC	--	--	--
49 W	42-353-01147	GRAYROCK ENERGY II, LLC	--	--	--
5	42-353-01566	GRAYROCK ENERGY II, LLC	--	--	--
50	42-353-01166	GRAYROCK ENERGY II, LLC	--	--	--
52	42-353-01142	GRAYROCK ENERGY II, LLC	--	--	--
53	42-353-01552	GRAYROCK ENERGY II, LLC	--	--	--
54	42-353-01554	GRAYROCK ENERGY II, LLC	--	--	--
56	42-353-01044	GRAYROCK ENERGY II, LLC	--	--	--
57	42-353-00942	GRAYROCK ENERGY II, LLC	--	--	--
58	42-353-00945	GRAYROCK ENERGY II, LLC	--	--	--
59	42-353-00946	GRAYROCK ENERGY II, LLC	--	--	--
6	42-353-01565	GRAYROCK ENERGY II, LLC	--	--	--
62	42-353-01556	GRAYROCK ENERGY II, LLC	--	--	--
63	42-353-01152	GRAYROCK ENERGY II, LLC	--	--	--
65	42-353-01551	GRAYROCK ENERGY II, LLC	--	--	--
66	42-353-01145	GRAYROCK ENERGY II, LLC	--	--	--
67	42-353-01048	GRAYROCK ENERGY II, LLC	--	--	--
68	42-353-00947	GRAYROCK ENERGY II, LLC	--	--	--
7	42-353-01165	GRAYROCK ENERGY II, LLC	--	--	--
71	42-353-00421	GRAYROCK ENERGY II, LLC	--	--	--
72	42-353-01559	GRAYROCK ENERGY II, LLC	--	--	--
74	42-353-01143	GRAYROCK ENERGY II, LLC	--	--	--
76	42-353-01146	GRAYROCK ENERGY II, LLC	--	--	--
77	42-353-01533	GRAYROCK ENERGY II, LLC	--	--	--
78	42-353-80312	GRAYROCK ENERGY II, LLC	--	--	--
79	42-353-01582	GRAYROCK ENERGY II, LLC	--	--	--
8	42-353-01164	GRAYROCK ENERGY II, LLC	--	--	--
80	42-353-01532	GRAYROCK ENERGY II, LLC	--	--	--
81	42-353-01535	GRAYROCK ENERGY II, LLC	--	--	--
81W	42-353-01535	GRAYROCK ENERGY II, LLC	--	--	--
82	42-353-01531	GRAYROCK ENERGY II, LLC	--	--	--
84	42-353-01529	GRAYROCK ENERGY II, LLC	--	--	--
85	42-353-01540	GRAYROCK ENERGY II, LLC	--	--	--
88	42-353-01585	GRAYROCK ENERGY II, LLC	--	--	--
9	42-353-01163	GRAYROCK ENERGY II, LLC	--	--	--
90	42-353-01580	GRAYROCK ENERGY II, LLC	--	--	--
92	42-353-01542	GRAYROCK ENERGY II, LLC	--	--	--
92W	42-353-01542	GRAYROCK ENERGY II, LLC	--	--	--
93	42-353-01583	GRAYROCK ENERGY II, LLC	--	--	--
94	42-353-01161	GRAYROCK ENERGY II, LLC	--	--	--

LAKE TRAMMEL UNIT

Production HistoryBeta Production data is a work in progress — still being validated against RRC filings. Spot something off or have questions? [email protected]

Decline Curve Analysis

Operator History (from monthly production reports)

Wells (203)

Production History