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Oklahoma's Most Productive Conventional Reservoir

The Oswego Formation is a conventional limestone reservoir spanning nearly two-thirds of Oklahoma, from the northwest to the southeast. It is one of the state's most historically significant and productive oil-bearing formations, with continuous production documented for over a century.

306 producing horizontal wells in the Oswego formation across the Kingfisher County trend have generated $2.7 billion in oil and gas production (as of February 2026). The top-performing well, the Dover, has delivered 708,786 barrels over more than 11 years and is still producing. These are not projections. Every number is verifiable through the Oklahoma Corporation Commission.

Oswego Wells Summary

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306

Total Oswego Wells

2,276

Avg Monthly Oil/Well

4,506

Avg Monthly Gas/Well

This production data is analog and benchmark data from producing wells in the Oswego formation operated by other companies across the Kingfisher County trend. It is not production from Trilateral's own wells and is not a forecast. Past production does not guarantee future results.

Well Production Data

#	Well Name	Months	Cum. Oil (BBL)	Cum. Gas (MCF)
1	Dover Unit (Ooid) 1OH-24	151	708,786	689,057
2	Dover Unit (Cardinal) 1MH-27	151	148,283	1,832,206
3	Hennessey Unit 1-11H OS	144	114,803	99,239
4	Hennessey Unit #2-11H OS	144	108,348	100,306
5	Dover Unit (Trifecta) 1OH-14	143	309,323	278,070
6	Hennessey Unit #3-11H OS	143	130,478	138,777
7	Hennessey Unit #1-10H OS	142	113,446	113,395
8	DOVER UNIT (TRIAD)	141	166,713	227,954
9	Hennessey Unit #1-2H OS	140	277,184	323,752
10	Lincoln Southeast Oswego Unit 89-2H	139	265,474	875,811
11	Hennessey Unit #2-3H OS	138	203,422	367,977
12	Dover Unit (Trellium) 1807 #1OH-11	137	80,415	96,001
13	Dover Unit (Callisto) 1807 1OH-23	135	142,620	154,662
14	Dover Unit (Trifecta) 1807 2OH-14	134	384,393	276,730
15	Hennessey Unit #1-3H OS	134	149,830	219,959
16	Hennessey Unit 1-9H OS	134	115,200	167,781
17	Emmerich 30-18-6 1H	134	79,131	258,390
18	Dover Unit (Trinity) 1807 1OH-26	133	169,307	249,521
19	Hennessey Unit 2-9H	133	94,732	94,124
20	Hughes Trust 33-18-7 1H	131	427,131	710,008
21	DOVER UNIT (TITANIA) 1807	127	172,139	451,555
22	Dover Unit (Triad) 1807 2OH-12	127	140,734	632,127
23	Dover Unit (Triton) 1807 1OH-15	124	131,510	162,594
24	Dover Unit (Tripoli) 1807 2OH-22	124	119,276	196,515
25	Sydena 1807 1OH-29	121	149,444	113,010
26	Luber 28-18-7 1H	121	90,325	74,746
27	MERITT 12-18-06	119	70,460	401,500
28	Mueggenborg 7-17-6 1H	117	170,408	258,293
29	Themer 6-17-6 1H	117	121,486	151,877
30	Ingle 32-18-6 1H	116	206,020	307,105
31	Hasty 3-18-6 1H	116	134,657	223,236
32	Vincent 25-18-7 1H	116	122,961	474,745
33	Caldwell 22-18-6 1H	115	240,863	781,516
34	Eugene 29-18-6 1H	114	191,588	508,504
35	Lightle 4-18-6 1H	114	130,136	175,913
36	Tomahawk 7-1H	114	92,856	124,515
37	Farrar 11-18-6 1H	113	145,140	291,624
38	Hill 2-18-6 1H	112	136,097	195,136
39	Stitt 7-17-6 2H	111	211,986	480,676
40	Stitt 7-17-6 3H	111	162,017	338,529
41	Morris 31-18-6 1H	110	294,144	320,627
42	Morris 31-18-6 2H	110	193,810	165,203
43	Carolyn 30-18-6 2H	109	107,749	248,500
44	Carolyn 30-18-6 3H	109	104,180	301,109
45	Anderson 31-19-5 2H	109	89,643	615,749
46	Foster 31-17-5 3H	108	138,887	295,391
47	Foster 31-17-5 2H	108	109,342	174,337
48	Foster 31-17-5 1H	108	75,679	139,649
49	Schuelein 12-18-6 2H	107	163,545	1,168,038
50	Schuelein 12-18-6 3H	107	93,038	870,562
51	Emery 31-18-6 3H	106	237,782	237,315
52	Helen 6-17-6 3H	106	153,953	238,059
53	Helen 6-17-6 2H	106	142,500	193,933
54	Pearl 3-18-6 4H	106	121,502	169,842
55	Pearl 3-18-6 2H	106	104,085	207,703
56	Vivian 13-18-6 1H	106	81,780	504,176
57	Pearl 3-18-6 3H	106	79,581	161,197
58	Bridal 22-18-6 2H	105	194,075	878,106
59	RAE 32-18-6	105	191,183	364,675
60	Bridal 22-18-6 3H	105	118,900	421,298
61	OK State 18-17-6 1H	104	101,531	219,099
62	Curtis 29-18-6 2H	103	276,344	462,975
63	Curtis 29-18-6 3H	103	155,829	294,240
64	Farrar 11-18-6 2H	103	124,856	330,786
65	Farrar 11-18-6 3H	103	112,602	366,311
66	Big Four 1706 1OH-36	103	89,567	225,670
67	Bradford 5-18-5 1H	103	70,817	417,544
68	Phyllis 35-O4H	102	200,704	546,697
69	Earl 14-18-6 2H	102	162,166	465,177
70	Earl 14-18-6 1H	102	154,208	582,338
71	Earl 14-18-6 3H	102	128,012	322,881
72	Mueggenborg 5-17-6 1H	101	148,878	338,475
73	Justin 8-17-6 1H	101	126,634	150,707
74	Mueggenborg 5-17-6 2H	101	87,254	206,935
75	Mueggenborg 5-17-6 3H	101	78,099	243,135
76	Bollenbach 36-17-6 2H	100	385,635	554,908
77	Bollenbach 36-17-6 1H	100	166,482	240,161
78	Perdue 23-17-7 1H	98	153,177	332,284
79	Perdue 23-17-7 2H	98	140,970	270,104
80	Buchmann 8-18-7 1H	98	77,478	144,603
81	Bullis 1-17-7 1HC	96	374,196	701,006
82	Bullis 1-17-7 2HC	96	333,067	565,700
83	Bullis 1-17-7 3HC	96	319,840	557,952
84	John 15-16-6 1HC	96	210,888	318,341
85	Earl 14-18-6 4HC	95	270,069	1,216,883
86	Pollard 15-18-6 1H	95	104,921	316,980
87	Tule 18-06-10 2H	95	79,946	104,386
88	Koopa 23 O1H	94	251,211	844,460
89	GM 12-17-7 1HC	94	194,782	293,749
90	GM 12-17-7 2HC	94	190,291	311,763
91	GM 12-17-7 3HC	94	148,094	246,660
92	States 15-18-6 4HC	93	336,492	541,669
93	Stuteville 23-17-7 3H	93	100,819	184,208
94	Koopa 23 O2H	92	166,474	563,384
95	Ogallala 18-06-01 1OH	92	110,915	500,165
96	Billy Bob 24-18-7 1H	91	270,296	554,676
97	Gabriel 34-19-6 3HC	91	255,113	617,292
98	Gabriel 34-19-6 1H	91	126,717	336,818
99	Harris 12-17-7 5HC	90	303,922	424,879
100	Harris 12-17-7 4HC	90	270,482	465,243
101	Koopa 23 O5H	89	247,120	843,600
102	Ruth 15-16-6 3HC	88	263,762	423,076
103	Ruth 15-16-6 2HC	88	251,078	427,779
104	Martin 34-19-6 1HC	88	211,659	391,372
105	Martin 34-19-6 2HC	88	164,762	265,663
106	Wesley 28-18-6 1HC	87	120,504	337,468
107	Phyllis 35-02SH	87	93,682	191,172
108	Stitt 7-17-6 4HC	86	186,581	430,119
109	Smith 24-17-7 2HC	84	329,033	652,095
110	Smith 9-16-6 1HC	84	173,013	320,285
111	Luber 21-18-7 2HC	83	597,589	411,246
112	Emmerich 30-18-6 5HC	83	199,547	564,976
113	Oltmanns 26-18-5 1H	82	74,106	461,812
114	Walt 26 O3HX	72	239,622	648,147
115	Lincoln Southeast Oswego Unit 46-2HO	58	111,060	136,117
116	Lincoln Southeast Oswego Unit 91-3HO	56	174,647	384,291
117	Lincoln Southeast Oswego Unit 48-3HO	56	120,599	142,330
118	Lincoln Southeast Oswego Unit 46-3HO	55	83,089	106,546
119	Lincoln Southeast Oswego Unit 38-4HO	54	173,600	192,106
120	Lincoln Southeast Oswego Unit 50-3HO	54	171,037	249,899
121	Randall 31-18-6 4HC	53	223,041	359,740
122	LSEOU 90-2HO	53	136,664	281,519
123	Lincoln Southeast Oswego Unit 89-3HO	52	124,235	411,798
124	Lincoln North Unit 51-4HO	52	86,558	293,565
125	Lincoln Southeast Oswego Unit 49-3HO	51	167,295	204,191
126	Lincoln Southeast Oswego Unit 45-3HO	51	125,855	204,821
127	Lincoln Southeast Oswego Unit 39-3HO	51	112,072	126,077
128	Lincoln Southeast Oswego Unit 59-1HO	50	151,631	198,893
129	Lincoln Southeast Oswego Unit 37-3HO	50	142,759	144,823
130	Lincoln Southeast Oswego Unit 8-2HO	50	91,504	207,792
131	Eugene 29-18-6 4H	50	88,713	473,521
132	Lincoln North Unit 42-4HO	50	83,588	264,078
133	Lincoln Southeast Oswego Unit 94-2HO	49	170,051	197,078
134	Lincoln Southeast Oswego Unit 95-3HO	49	74,191	121,273
135	Ruth 10-16-6 4HC	48	213,136	589,619
136	Lincoln Southeast Oswego Unit 58-4HO	48	113,071	138,490
137	Beverly 22-17-7 1H	48	112,979	255,626
138	Beverly 27-17-7 3HC	48	111,455	192,426
139	Lincoln Southeast Oswego Unit 57-3HO	48	108,960	273,912
140	Rita 27-18-6 1HC	48	106,851	439,589
141	Lincoln North Unit 81-3HO	48	101,545	226,301
142	Lincoln North Unit 62-3HO	48	82,148	176,936
143	Lincoln Southeast Oswego Unit 25-4HO	47	119,150	168,281
144	Lincoln Southeast Oswego Unit 24-4HO	47	87,494	141,268
145	LSEO Unit 35-2HO Tract 35-A	46	199,988	796,871
146	LSEO Unit 36-3HO Tract 36-A	46	194,088	378,407
147	Lincoln Southeast Oswego Unit 16-1HO	46	87,863	152,703
148	Lincoln N Unit 113-3HO Tract 113-A	45	91,363	172,337
149	Lincoln North Unit 82-4HO	45	75,253	255,358
150	Lincoln Southeast Oswego Unit 91-4HO	44	138,225	262,647
151	Lincoln North Unit 81-4HO	44	117,410	250,390
152	Lincoln North Unit 80-5HO	44	76,988	134,288
153	Lincoln North Unit 52-2HO	44	76,830	135,465
154	Lincoln North Unit 114-2HO	44	71,034	288,385
155	Lincoln Southeast Oswego Unit 88-2HO	43	114,391	296,764
156	Lincoln North Unit 53-2HO	43	107,401	229,787
157	Lincoln Southeast Oswego Unit 34-3HO	43	89,666	352,504
158	Lincoln North Unit 62-4HO	43	75,241	112,593
159	Lincoln Southeast Oswego Unit 50-4HO	43	73,046	119,696
160	BENDA 3-16-6	42	129,544	183,599
161	Lincoln Southeast Oswego Unit 90-3HO	42	75,328	334,763
162	Lincoln SE Oswego Unit 92-3HO	41	113,033	294,641
163	Lincoln Southeast Oswego Unit 94-3HO	41	109,706	156,902
164	Lincoln Southeast Oswego Unit 49-4HO	40	83,161	116,704
165	Lincoln Southeast Oswego Unit 48-4HO	40	78,781	96,183
166	PAULINE 32-18-6	32	113,501	102,172
167	THOMAS 9/4-16-6	26	198,748	320,122
168	THOMAS 9/4-16-6	22	115,444	242,565
169	Pauline 32-18-6	21	70,066	133,326
170	DOVER UNIT (TRIDENT) 1807	20	80,393	39,168
171	Gabriel 34/27-19-6	14	82,313	125,514
172	JANET 10/15-16-6	12	91,488	129,113
173	Dover Unit (Triad) 1807	11	139,586	187,537
174	Dover Unit (Titania) 1807	11	92,660	111,835
175	NORMAN 26/23/14-16-6	10	119,760	216,020
176	EVELYN STATE 7/6-17-6	10	110,018	51,342

Table lists the 176 wells in the Kingfisher County trend that have each produced over 70,000 barrels, of 306 producing horizontal Oswego wells. Source: PetroBase Explorer / Oklahoma Corporation Commission public records. Production current through February 2026. Click column headers to sort.

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