EAST KEYSTONE(SAN A HOLT UNIT)

Oil // district 10 // lease#36780

op: PRIZE OPERATING COMPANY

fields: KEYSTONE (HOLT)

cum_oil

1.3M BBL

cum_gas

0 MCF

wells

production

2002-01 — 2015-12

peak_month

2002-01

-- production_history

cum_oil: 1,286,110 BBL cum_gas: 0 MCF

-- decline_curve_analysis

12,102 BBL/mo

Di (annual)

7.2%

b-factor

0.0

EUR

1,973,402 BBL

R-squared

0.646

type

exponential

-- wells (81)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
912	42-495-30339	CIMAREX ENERGY CO.	2	5,600	2011-08-31
816	42-495-30319	PARKER & PARSLEY PRODUCING L.P.	2	5,500	2011-08-30
911	42-495-30340	CIMAREX ENERGY CO.	2	5,600	2011-05-03
833	42-495-30318	PARKER & PARSLEY PRODUCING L.P.	3	5,500	2011-04-08
702	42-495-32526	PARKER & PARSLEY PRODUCING L.P.	2	5,500	2003-10-01
1301	42-495-32923	GRUY PETROLEUM MANAGEMENT CO.	1	5,600	2003-07-09
1202	42-495-30342	GRUY PETROLEUM MANAGEMENT CO.	1	5,600	2002-07-16
1204	42-495-30382	GRUY PETROLEUM MANAGEMENT CO.	1	5,600	2002-07-16
401	42-495-32550	PARKER & PARSLEY PRODUCING L.P.	4	5,500	2002-06-05
831	42-495-05303	PRIZE OPERATING COMPANY	2	5,500	2001-10-24
801	42-495-32566	PRIZE OPERATING COMPANY	3	5,500	2001-05-31
830	42-495-32592	PRIZE OPERATING COMPANY	2	5,500	2001-02-12
704	42-495-32481	PRIZE OPERATING COMPANY	3	5,500	2000-12-20
905	42-495-32539	PRIZE OPERATING COMPANY	2	5,600	2000-12-20
829	42-495-32507	PRIZE OPERATING COMPANY	3	5,500	2000-12-19
901	42-495-32594	PRIZE OPERATING COMPANY	2	5,500	2000-11-08
909	42-495-32763	HALLWOOD PETROLEUM, INC.	2	5,500	1999-07-15
913	42-495-32762	HALLWOOD PETROLEUM, INC.	2	5,500	1999-07-13
804	42-495-32499	HALLWOOD PETROLEUM, INC.	4	5,500	1999-02-08
805	42-495-32532	HALLWOOD PETROLEUM, INC.	3	5,500	1999-02-08
1201	42-495-30303	HALLWOOD PETROLEUM, INC.	1	5,285	1998-08-05
917	42-495-32734	HALLWOOD PETROLEUM, INC.	1	5,400	1998-08-05
903	42-495-32572	HALLWOOD PETROLEUM, INC.	2	5,500	1998-05-19
914	42-495-30294	HALLWOOD PETROLEUM, INC.	1	5,500	1997-08-11
902	42-495-32664	HALLWOOD PETROLEUM, INC.	1	5,500	1997-05-30
838	42-495-32573	PARKER & PARSLEY PRODUCING L.P.	2	5,500	1997-05-07
403	42-495-32583	PARKER & PARSLEY PRODUCING L.P.	2	5,500	1997-05-01
835	42-495-32531	PARKER & PARSLEY PRODUCING L.P.	2	5,500	1997-04-25
836	42-495-32530	PARKER & PARSLEY PRODUCING L.P.	2	5,500	1997-04-25
837	42-495-32529	PARKER & PARSLEY PRODUCING L.P.	2	5,500	1997-04-25
821	42-495-32467	PARKER & PARSLEY PRODUCING L.P.	2	5,500	1997-04-22
827	42-495-32515	PARKER & PARSLEY PRODUCING L.P.	2	5,500	1997-04-22
402	42-495-32549	PARKER & PARSLEY PRODUCING L.P.	2	5,500	1997-04-09
828	42-495-32506	PARKER & PARSLEY PRODUCING L.P.	2	5,500	1997-04-09
908	42-495-32575	HALLWOOD PETROLEUM, INC.	1	5,500	1996-09-04
906	42-495-30313	HALLWOOD PETROLEUM, INC.	1	5,500	1996-08-14
201	42-495-32544	HALLWOOD PETROLEUM, INC.	1	5,500	1996-05-20
819	42-495-32466	PARKER & PARSLEY PRODUCING L.P.	2	5,500	1996-04-10
904	42-495-32527	HALLWOOD PETROLEUM, INC.	1	5,500	1996-03-12
1307	42-495-01330	VISTA RESOURCES, INC. (A)	1	5,480	1996-03-06
703	42-495-32523	PARKER & PARSLEY PRODUCING L.P.	1	5,500	1996-02-12
820	42-495-32442	PARKER & PARSLEY PRODUCING L.P.	2	5,500	1996-02-05
910	42-495-30317	APACHE CORPORATION	1	5,600	1996-01-18
1302	42-495-30400	VISTA RESOURCES, INC. (A)	1	5,600	1995-12-27
1305	42-495-32346	VISTA RESOURCES, INC. (A)	2	5,600	1995-12-27
1308	42-495-01332	VISTA RESOURCES, INC. (A)	1	5,600	1995-12-27
1309	42-495-30398	VISTA RESOURCES, INC. (A)	1	5,600	1995-12-27
1303	42-495-30399	VISTA RESOURCES, INC. (A)	1	5,600	1995-12-22
1304	42-495-32272	VISTA RESOURCES, INC. (A)	2	5,400	1995-11-21
832	42-495-05300	PARKER & PARSLEY PRODUCING L.P.	1	5,500	1995-10-12
834	42-495-30364	PARKER & PARSLEY PRODUCING L.P.	1	5,500	1995-09-13
815	42-495-05301	PARKER & PARSLEY PRODUCING L.P.	1	5,500	1995-08-08
802	42-495-32482	HALLWOOD PETROLEUM, INC.	1	5,500	1995-06-21
823	42-495-05255	HALLWOOD PETROLEUM, INC.	1	5,500	1995-06-21
301	42-495-30357	HALLWOOD PETROLEUM, INC.	1	5,300	1995-06-13
302	42-495-03945	HALLWOOD PETROLEUM, INC.	1	5,300	1995-06-12
803	42-495-32478	HALLWOOD PETROLEUM, INC.	1	5,500	1995-05-15
806	42-495-05254	HALLWOOD PETROLEUM, INC.	1	5,500	1995-03-28
809	42-495-30347	HALLWOOD PETROLEUM, INC.	1	5,500	1995-03-22
822	42-495-05253	HALLWOOD PETROLEUM, INC.	1	5,500	1995-03-22
824	42-495-30280	HALLWOOD PETROLEUM, INC.	1	5,500	1995-03-21
825	42-495-30289	HALLWOOD PETROLEUM, INC.	1	5,500	1995-03-21
1203	42-495-30356	HALLWOOD PETROLEUM, INC.	1	5,500	1995-03-16
202	42-495-30324	HALLWOOD PETROLEUM, INC.	1	5,500	1995-03-13
1300	42-495-01307	VISTA RESOURCES, INC. (A)	2	8,305	1995-03-08
808	42-495-05760	HALLWOOD PETROLEUM, INC.	1	5,500	1995-02-28
817	42-495-30365	PARKER & PARSLEY PRODUCING L.P.	1	5,500	1995-02-28
811	42-495-32470	HALLWOOD PETROLEUM, INC.	1	5,500	1995-02-02
812	42-495-32468	HALLWOOD PETROLEUM, INC.	1	5,500	1995-01-19
807	42-495-05256	HALLWOOD PETROLEUM, INC.	2	5,500	1994-08-18
810	42-495-32444	HALLWOOD ENERGY CORPORATION	1	5,500	1994-01-12
705	42-495-31869	AMOCO PRODUCTION CO.-ANDREWS	1	6,800	1984-12-17
814	42-495-05299	AMOCO PRODUCTION CO.-ANDREWS	1	8,110	1984-11-07
706	42-495-05216	AMOCO PRODUCTION CO.-ANDREWS	1	8,006	1984-07-05
701	42-495-05217	AMOCO PRODUCTION CO.-ANDREWS	3	10,041	1982-10-29
1205	42-495-30522	--	--	--	--
203	42-495-30323	--	--	--	--
813	42-495-05302	--	--	--	--
907	42-495-30328	--	--	--	--
915	42-495-30298	--	--	--	--
916	42-495-30310	--	--	--	--