KLOH

Oil · District 08 · Lease #2748

Operator: SOUTHLAND ROYALTY COMPANY

Fields: HOWARD GLASSCOCK

Cum Oil

1.8M BBL

Cum Gas

751 MCF

casinghead

Wells

Production

1993-01 — 2011-11

Peak Month

2000-01

Production History

Cum Oil: 1,841,320 BBL Cum Gas: 751 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

10,381 BBL/mo

Di (annual)

3.5%

b-factor

2.0

EUR

4,000,992 BBL

R-squared

0.443

type

hyperbolic

Operator History (from monthly production reports)

2006-05 — 2013-03 CIMAREX ENERGY CO. OF COLORADO 83 mo

2003-01 — 2006-04 GRUY PETROLEUM MANAGEMENT CO. 40 mo

1999-10 — 2002-12 KERR-MCGEE OIL & GAS ONSHORE LLC 39 mo

1999-04 — 1999-09 KERR-MCGEE CORPORATION 6 mo

1998-02 — 1999-03 ORYX ENERGY COMPANY 14 mo

1997-05 — 1998-01 GRUY PETROLEUM MANAGEMENT CO. 9 mo

1996-08 — 1997-04 BURLINGTON RESOURCES OIL&GAS CO. 9 mo

1996-03 — 1996-07 MERIDIAN OIL INC. 5 mo

1993-01 — 1996-02 SOUTHLAND ROYALTY COMPANY 38 mo

Wells (88)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
60	42-227-35873	GRAYROCK ENERGY II, LLC	1	3,100	2004-05-20
47L	42-227-35511	GRAYROCK ENERGY II, LLC	1	2,900	2000-04-28
47U	42-227-35511	GRAYROCK ENERGY II, LLC	1	2,900	2000-04-28
53L	42-227-35505	GRAYROCK ENERGY II, LLC	2	2,900	2000-04-24
53U	42-227-35505	GRAYROCK ENERGY II, LLC	2	2,900	2000-04-24
54L	42-173-33025	GRAYROCK ENERGY II, LLC	2	2,900	2000-04-24
54U	42-173-33025	GRAYROCK ENERGY II, LLC	2	2,900	2000-04-24
55L	42-227-35506	CIMAREX ENERGY CO. OF COLORADO	2	2,900	2000-04-24
55U	42-227-35506	CIMAREX ENERGY CO. OF COLORADO	2	2,900	2000-04-24
56L	42-173-33026	GRAYROCK ENERGY II, LLC	2	2,900	2000-04-24
56U	42-173-33026	GRAYROCK ENERGY II, LLC	2	2,900	2000-04-24
57L	42-173-33027	GRAYROCK ENERGY II, LLC	2	2,900	2000-04-24
57U	42-173-33027	GRAYROCK ENERGY II, LLC	2	2,900	2000-04-24
58L	42-227-35507	GRAYROCK ENERGY II, LLC	2	2,900	2000-04-24
58U	42-227-35507	GRAYROCK ENERGY II, LLC	2	2,900	2000-04-24
50L	42-227-35503	GRAYROCK ENERGY II, LLC	1	2,900	2000-04-19
50U	42-227-35503	GRAYROCK ENERGY II, LLC	1	2,900	2000-04-19
51L	42-227-35502	GRAYROCK ENERGY II, LLC	1	2,900	2000-04-19
51U	42-227-35502	GRAYROCK ENERGY II, LLC	1	2,900	2000-04-19
52L	42-173-33024	GRAYROCK ENERGY II, LLC	1	2,900	2000-04-19
52U	42-173-33024	GRAYROCK ENERGY II, LLC	1	2,900	2000-04-19
22	42-227-31545	GRAYROCK ENERGY II, LLC	2	2,700	1999-08-23
22W	42-227-31545	GRAYROCK ENERGY II, LLC	2	2,700	1999-08-23
1	42-227-02945	GRAYROCK ENERGY II, LLC	3	2,500	1999-08-13
1W	42-227-02945	GRAYROCK ENERGY II, LLC	3	2,500	1999-08-13
21	42-227-31547	GRAYROCK ENERGY II, LLC	2	2,700	1999-08-13
21W	42-227-31547	GRAYROCK ENERGY II, LLC	2	2,700	1999-08-13
48	42-227-35359	GRAYROCK ENERGY II, LLC	1	2,900	1999-08-13
59	42-227-35360	GRAYROCK ENERGY II, LLC	1	2,900	1999-08-13
24	42-227-31546	GRAYROCK ENERGY II, LLC	2	2,700	1999-08-11
24W	42-227-31546	GRAYROCK ENERGY II, LLC	2	2,700	1999-08-11
15W	42-173-00500	GRAYROCK ENERGY II, LLC	1	2,399	1999-08-10
49	42-227-35307	GRAYROCK ENERGY II, LLC	1	2,900	1998-03-18
41L	42-227-35292	GRAYROCK ENERGY II, LLC	1	2,900	1998-02-19
41U	42-227-35292	GRAYROCK ENERGY II, LLC	1	2,900	1998-02-19
42L	42-227-35291	GRAYROCK ENERGY II, LLC	1	2,900	1998-02-19
42U	42-227-35291	GRAYROCK ENERGY II, LLC	1	2,900	1998-02-19
43L	42-227-35290	GRAYROCK ENERGY II, LLC	1	2,900	1998-02-19
43U	42-227-35290	GRAYROCK ENERGY II, LLC	1	2,900	1998-02-19
46	42-227-35289	GRAYROCK ENERGY II, LLC	1	2,900	1998-02-18
44L	42-227-35285	GRAYROCK ENERGY II, LLC	1	2,900	1998-02-12
44U	42-227-35285	GRAYROCK ENERGY II, LLC	1	2,900	1998-02-12
45L	42-227-35284	GRAYROCK ENERGY II, LLC	1	2,900	1998-02-12
45U	42-227-35284	GRAYROCK ENERGY II, LLC	1	2,900	1998-02-12
37	42-227-34593	GRAYROCK ENERGY II, LLC	1	2,500	1990-10-02
37L	42-227-34593	GRAYROCK ENERGY II, LLC	1	2,500	1990-10-02
37U	42-227-34593	GRAYROCK ENERGY II, LLC	1	2,500	1990-10-02
38	42-227-34591	GRAYROCK ENERGY II, LLC	1	2,500	1990-10-02
39	42-227-34592	GRAYROCK ENERGY II, LLC	1	2,500	1990-10-02
39L	42-227-34592	GRAYROCK ENERGY II, LLC	1	2,500	1990-10-02
39U	42-227-34592	GRAYROCK ENERGY II, LLC	1	2,500	1990-10-02
39W	42-227-34592	GRAYROCK ENERGY II, LLC	1	2,500	1990-10-02
36	42-227-34395	GRAYROCK ENERGY II, LLC	2	2,600	1988-11-18
34	42-227-34226	GRAYROCK ENERGY II, LLC	1	2,600	1987-11-12
34L	42-227-34226	GRAYROCK ENERGY II, LLC	1	2,600	1987-11-12
34U	42-227-34226	GRAYROCK ENERGY II, LLC	1	2,600	1987-11-12
35	42-227-34227	GRAYROCK ENERGY II, LLC	1	2,600	1987-11-12
33	42-227-34109	GRAYROCK ENERGY II, LLC	2	4,500	1986-11-18
33L	42-227-34109	GRAYROCK ENERGY II, LLC	2	4,500	1986-11-18
33U	42-227-34109	GRAYROCK ENERGY II, LLC	2	4,500	1986-11-18
32	42-227-34076	GRAYROCK ENERGY II, LLC	1	2,700	1986-10-28
31	42-173-31803	GRAYROCK ENERGY II, LLC	1	2,600	1985-02-04
23	42-227-31548	GRAYROCK ENERGY II, LLC	1	2,700	1978-01-04
23W	42-227-31548	GRAYROCK ENERGY II, LLC	1	2,700	1978-01-04
25	42-227-31549	GRAYROCK ENERGY II, LLC	1	2,700	1978-01-04
26	42-173-30901	GRAYROCK ENERGY II, LLC	1	2,700	1978-01-04
27	42-173-30902	GRAYROCK ENERGY II, LLC	1	2,700	1978-01-04
28	42-173-30903	GRAYROCK ENERGY II, LLC	1	2,700	1978-01-04
10	42-227-01891	GRAYROCK ENERGY II, LLC	--	--	--
10L	42-227-01891	GRAYROCK ENERGY II, LLC	--	--	--
10U	42-227-01891	GRAYROCK ENERGY II, LLC	--	--	--
11	42-227-01892	GRAYROCK ENERGY II, LLC	--	--	--
12	42-173-00499	GRAYROCK ENERGY II, LLC	--	--	--
13	42-227-01893	GRAYROCK ENERGY II, LLC	--	--	--
14W	42-227-01894	CIMAREX ENERGY CO. OF COLORADO	--	--	--
16	42-173-00501	GRAYROCK ENERGY II, LLC	--	--	--
17	42-227-01902	GRAYROCK ENERGY II, LLC	--	--	--
1D	42-173-10088	GRAYROCK ENERGY II, LLC	--	--	--
2	42-227-80299	GRAYROCK ENERGY II, LLC	--	--	--
20	42-227-31105	GRAYROCK ENERGY II, LLC	--	--	--
3	42-173-00703	GRAYROCK ENERGY II, LLC	--	--	--
5	42-173-00704	GRAYROCK ENERGY II, LLC	--	--	--
5L	42-173-00704	GRAYROCK ENERGY II, LLC	--	--	--
5U	42-173-00704	GRAYROCK ENERGY II, LLC	--	--	--
6	42-173-01302	GRAYROCK ENERGY II, LLC	--	--	--
7	42-227-02948	GRAYROCK ENERGY II, LLC	--	--	--
8	42-227-02949	GRAYROCK ENERGY II, LLC	--	--	--
9W	42-227-02950	CIMAREX ENERGY CO. OF COLORADO	--	--	--

KLOH

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 (88)

Production History