PRENTICE NORTHEAST UNIT

Oil · District 8A · Lease #18607

Operator: XTO ENERGY INC.

Fields: PRENTICE (6700)

Cum Oil

27.6M BBL

Cum Gas

6.5M MCF

casinghead

Wells

621

Production

1993-01 — 2026-04

Peak Month

1993-01

Production History

Cum Oil: 27,591,247 BBL Cum Gas: 6,518,215 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

125,928 BBL/mo

Di (annual)

5.6%

b-factor

0.0

EUR

25,184,296 BBL

R-squared

0.938

type

exponential

Operator History (from monthly production reports)

2022-01 — 2026-07 HIGHMARK ENERGY OPERATING, LLC 55 mo

2001-06 — 2021-12 XTO ENERGY INC. 247 mo

1994-01 — 2001-05 CROSS TIMBERS OPERATING COMPANY 89 mo

1993-01 — 1993-12 AMOCO PRODUCTION COMPANY 12 mo

Wells (621)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
81A	42-445-00236	HIGHMARK ENERGY OPERATING, LLC	1	6,950	2017-09-11
24 L	42-445-00530	HIGHMARK ENERGY OPERATING, LLC	1	7,500	2017-04-28
24 U	42-445-00530	HIGHMARK ENERGY OPERATING, LLC	1	7,500	2017-04-28
78 L	42-445-10242	HIGHMARK ENERGY OPERATING, LLC	1	8,000	2013-07-29
78R	42-445-10242	HIGHMARK ENERGY OPERATING, LLC	1	8,000	2013-07-29
78 U	42-445-10242	HIGHMARK ENERGY OPERATING, LLC	1	8,000	2013-07-29
1904	42-445-32369	HIGHMARK ENERGY OPERATING, LLC	1	7,600	2013-04-12
87	42-445-00334	HIGHMARK ENERGY OPERATING, LLC	1	6,750	2012-10-12
87 L	42-445-00334	HIGHMARK ENERGY OPERATING, LLC	1	6,750	2012-10-12
87 U	42-445-00334	HIGHMARK ENERGY OPERATING, LLC	1	6,750	2012-10-12
87W	42-445-00334	HIGHMARK ENERGY OPERATING, LLC	1	6,750	2012-10-12
527	42-445-32312	HIGHMARK ENERGY OPERATING, LLC	1	7,500	2011-11-01
581	42-445-32313	HIGHMARK ENERGY OPERATING, LLC	1	7,500	2011-10-14
7	42-445-00349	HIGHMARK ENERGY OPERATING, LLC	1	7,500	2010-09-13
7 L	42-445-00349	HIGHMARK ENERGY OPERATING, LLC	1	7,500	2010-09-13
7 U	42-445-00349	HIGHMARK ENERGY OPERATING, LLC	1	7,500	2010-09-13
618	42-445-32082	HIGHMARK ENERGY OPERATING, LLC	2	7,500	2010-08-06
618H	42-445-32082	HIGHMARK ENERGY OPERATING, LLC	2	7,500	2010-08-06
89A	42-445-00335	HIGHMARK ENERGY OPERATING, LLC	1	6,732	2010-05-11
89 L	42-445-00335	HIGHMARK ENERGY OPERATING, LLC	1	6,732	2010-05-11
89 U	42-445-00335	HIGHMARK ENERGY OPERATING, LLC	1	6,732	2010-05-11
2131E	42-445-32200	HIGHMARK ENERGY OPERATING, LLC	1	7,400	2008-04-11
1839N	42-445-32199	HIGHMARK ENERGY OPERATING, LLC	1	7,300	2008-03-27
2113E	42-445-32198	HIGHMARK ENERGY OPERATING, LLC	1	7,400	2008-03-27
10	42-445-00563	HIGHMARK ENERGY OPERATING, LLC	1	7,000	2007-10-26
139	42-445-30109	HIGHMARK ENERGY OPERATING, LLC	1	6,017	2007-08-18
42 L	42-445-00517	HIGHMARK ENERGY OPERATING, LLC	1	7,500	2007-05-10
42 U	42-445-00517	HIGHMARK ENERGY OPERATING, LLC	1	7,500	2007-05-10
42W	42-445-00517	HIGHMARK ENERGY OPERATING, LLC	1	7,500	2007-05-10
71	42-445-00529	HIGHMARK ENERGY OPERATING, LLC	1	6,945	2007-05-03
148 L	42-445-30846	HIGHMARK ENERGY OPERATING, LLC	2	7,500	2007-01-30
148 U	42-445-30846	HIGHMARK ENERGY OPERATING, LLC	2	7,500	2007-01-30
148W	42-445-30846	HIGHMARK ENERGY OPERATING, LLC	2	7,500	2007-01-30
9	42-445-00097	HIGHMARK ENERGY OPERATING, LLC	1	7,500	2007-01-30
9L	42-445-00097	HIGHMARK ENERGY OPERATING, LLC	1	7,500	2007-01-30
9U	42-445-00097	HIGHMARK ENERGY OPERATING, LLC	1	7,500	2007-01-30
9W	42-445-00097	HIGHMARK ENERGY OPERATING, LLC	1	7,500	2007-01-30
6	42-445-00348	HIGHMARK ENERGY OPERATING, LLC	1	7,500	2006-12-22
2B	42-445-00112	HIGHMARK ENERGY OPERATING, LLC	1	7,500	2006-12-15
2W	42-445-00112	HIGHMARK ENERGY OPERATING, LLC	1	7,500	2006-12-15
17 L	42-445-00346	HIGHMARK ENERGY OPERATING, LLC	1	7,450	2006-12-13
17 U	42-445-00346	HIGHMARK ENERGY OPERATING, LLC	1	7,450	2006-12-13
490	42-445-32166	HIGHMARK ENERGY OPERATING, LLC	1	7,600	2006-12-12
48	42-445-00534	HIGHMARK ENERGY OPERATING, LLC	1	7,500	2006-12-08
48 L	42-445-00534	HIGHMARK ENERGY OPERATING, LLC	1	7,500	2006-12-08
48 U	42-445-00534	HIGHMARK ENERGY OPERATING, LLC	1	7,500	2006-12-08
533	42-445-32163	HIGHMARK ENERGY OPERATING, LLC	1	7,600	2006-12-06
647	42-445-32159	HIGHMARK ENERGY OPERATING, LLC	1	7,600	2006-11-29
747	42-445-32160	HIGHMARK ENERGY OPERATING, LLC	1	7,600	2006-11-29
511	42-445-32157	HIGHMARK ENERGY OPERATING, LLC	1	7,600	2006-11-20
607	42-445-32158	HIGHMARK ENERGY OPERATING, LLC	1	7,600	2006-11-20
505	42-445-32152	HIGHMARK ENERGY OPERATING, LLC	1	7,600	2006-11-17
696	42-445-32151	HIGHMARK ENERGY OPERATING, LLC	1	7,500	2006-11-14
506	42-445-32046	HIGHMARK ENERGY OPERATING, LLC	2	7,358	2006-10-20
277	42-445-32119	HIGHMARK ENERGY OPERATING, LLC	1	7,600	2006-04-21
113B	42-445-00217	HIGHMARK ENERGY OPERATING, LLC	1	6,500	2006-04-20
617	42-445-32120	HIGHMARK ENERGY OPERATING, LLC	1	7,600	2006-03-23
609	42-445-32118	HIGHMARK ENERGY OPERATING, LLC	1	7,600	2006-03-09
520	42-445-32117	HIGHMARK ENERGY OPERATING, LLC	1	7,400	2006-02-16
588	42-445-32114	HIGHMARK ENERGY OPERATING, LLC	1	7,600	2006-02-16
802	42-445-32115	HIGHMARK ENERGY OPERATING, LLC	1	7,600	2006-02-16
731	42-445-32113	HIGHMARK ENERGY OPERATING, LLC	1	7,600	2006-02-08
160	42-445-31180	HIGHMARK ENERGY OPERATING, LLC	2	7,450	2005-06-29
281	42-445-32091	HIGHMARK ENERGY OPERATING, LLC	1	7,350	2005-05-05
302	42-445-32075	HIGHMARK ENERGY OPERATING, LLC	1	7,350	2005-01-19
304	42-445-32074	HIGHMARK ENERGY OPERATING, LLC	1	7,350	2005-01-19
488	42-445-32076	HIGHMARK ENERGY OPERATING, LLC	1	7,350	2005-01-19
512	42-445-32077	HIGHMARK ENERGY OPERATING, LLC	1	7,350	2005-01-19
531	42-445-32078	HIGHMARK ENERGY OPERATING, LLC	2	7,600	2005-01-19
538	42-445-32079	HIGHMARK ENERGY OPERATING, LLC	2	7,550	2005-01-19
553	42-445-32080	HIGHMARK ENERGY OPERATING, LLC	1	7,350	2005-01-19
566	42-445-32081	HIGHMARK ENERGY OPERATING, LLC	1	7,350	2005-01-19
698	42-445-32083	HIGHMARK ENERGY OPERATING, LLC	1	7,350	2005-01-19
8	42-445-00098	HIGHMARK ENERGY OPERATING, LLC	1	7,400	2005-01-19
294	42-445-32066	HIGHMARK ENERGY OPERATING, LLC	1	7,350	2004-11-18
685	42-445-32065	HIGHMARK ENERGY OPERATING, LLC	2	7,360	2004-11-18
43 L	42-445-00521	HIGHMARK ENERGY OPERATING, LLC	3	5,700	2004-10-12
43 U	42-445-00521	HIGHMARK ENERGY OPERATING, LLC	3	5,700	2004-10-12
303	42-445-32047	HIGHMARK ENERGY OPERATING, LLC	1	7,358	2004-03-05
480	42-445-32048	HIGHMARK ENERGY OPERATING, LLC	1	7,344	2004-03-05
503	42-445-32049	HIGHMARK ENERGY OPERATING, LLC	1	7,322	2004-03-05
509	42-445-32041	HIGHMARK ENERGY OPERATING, LLC	1	7,383	2004-03-05
530	42-445-32042	HIGHMARK ENERGY OPERATING, LLC	1	7,356	2004-03-05
579	42-445-32043	HIGHMARK ENERGY OPERATING, LLC	1	7,420	2004-03-05
583	42-445-32044	HIGHMARK ENERGY OPERATING, LLC	1	7,323	2004-03-05
613	42-445-32045	HIGHMARK ENERGY OPERATING, LLC	1	7,360	2004-03-05
687	42-445-32040	HIGHMARK ENERGY OPERATING, LLC	1	7,080	2004-03-05
558	42-445-31983	HIGHMARK ENERGY OPERATING, LLC	2	8,400	2004-01-09
479	42-445-32029	HIGHMARK ENERGY OPERATING, LLC	1	7,370	2003-08-28
559	42-445-32027	HIGHMARK ENERGY OPERATING, LLC	1	7,395	2003-08-28
801	42-445-32028	HIGHMARK ENERGY OPERATING, LLC	1	7,350	2003-08-28
686	42-445-32025	HIGHMARK ENERGY OPERATING, LLC	1	7,085	2003-08-18
753	42-445-32026	HIGHMARK ENERGY OPERATING, LLC	1	7,170	2003-08-18
501	42-445-32009	HIGHMARK ENERGY OPERATING, LLC	1	7,395	2003-02-27
271	42-445-32007	HIGHMARK ENERGY OPERATING, LLC	1	7,345	2003-02-20
271W	42-445-32007	HIGHMARK ENERGY OPERATING, LLC	1	7,345	2003-02-20
301	42-445-32008	HIGHMARK ENERGY OPERATING, LLC	1	7,380	2003-02-20
504	42-445-32010	HIGHMARK ENERGY OPERATING, LLC	1	7,371	2003-02-20
508	42-445-32011	HIGHMARK ENERGY OPERATING, LLC	1	7,405	2003-02-20
510	42-445-32012	HIGHMARK ENERGY OPERATING, LLC	1	7,365	2003-02-20
517	42-445-32013	HIGHMARK ENERGY OPERATING, LLC	1	7,175	2003-02-20
517L	42-445-32013	HIGHMARK ENERGY OPERATING, LLC	1	7,175	2003-02-20
517U	42-445-32013	HIGHMARK ENERGY OPERATING, LLC	1	7,175	2003-02-20
541	42-445-32014	HIGHMARK ENERGY OPERATING, LLC	1	7,028	2003-02-20
800	42-445-32015	HIGHMARK ENERGY OPERATING, LLC	1	7,296	2003-02-20
35	42-445-00299	HIGHMARK ENERGY OPERATING, LLC	1	6,750	2002-08-12
35 L	42-445-00299	HIGHMARK ENERGY OPERATING, LLC	1	6,750	2002-08-12
35 U	42-445-00299	HIGHMARK ENERGY OPERATING, LLC	1	6,750	2002-08-12
519	42-445-31995	HIGHMARK ENERGY OPERATING, LLC	1	7,275	2002-07-31
300	42-445-31991	HIGHMARK ENERGY OPERATING, LLC	1	7,315	2002-07-29
550	42-445-31990	HIGHMARK ENERGY OPERATING, LLC	2	7,235	2002-07-29
560	42-445-31988	HIGHMARK ENERGY OPERATING, LLC	1	7,430	2002-07-29
562	42-445-31989	HIGHMARK ENERGY OPERATING, LLC	1	7,420	2002-07-29
622	42-445-31992	HIGHMARK ENERGY OPERATING, LLC	1	7,430	2002-07-29
522	42-445-31987	HIGHMARK ENERGY OPERATING, LLC	1	7,225	2002-07-26
666	42-445-31721	HIGHMARK ENERGY OPERATING, LLC	2	7,100	2001-08-06
523	42-445-31961	HIGHMARK ENERGY OPERATING, LLC	1	7,315	2001-03-30
534	42-445-31962	HIGHMARK ENERGY OPERATING, LLC	1	7,400	2001-03-30
299	42-445-31951	HIGHMARK ENERGY OPERATING, LLC	1	7,450	2001-03-20
547	42-445-31958	HIGHMARK ENERGY OPERATING, LLC	1	7,300	2001-03-20
587	42-445-31957	HIGHMARK ENERGY OPERATING, LLC	1	7,450	2001-03-20
589	42-445-31956	HIGHMARK ENERGY OPERATING, LLC	1	7,450	2001-03-20
590	42-445-31954	HIGHMARK ENERGY OPERATING, LLC	1	7,380	2001-03-20
646	42-445-31955	HIGHMARK ENERGY OPERATING, LLC	1	7,400	2001-03-20
688	42-445-31953	HIGHMARK ENERGY OPERATING, LLC	1	7,125	2001-03-20
724	42-445-31952	HIGHMARK ENERGY OPERATING, LLC	1	7,300	2001-03-20
502	42-445-31928	HIGHMARK ENERGY OPERATING, LLC	1	7,425	2000-08-10
684	42-445-31927	HIGHMARK ENERGY OPERATING, LLC	1	7,125	2000-08-10
280	42-445-31922	HIGHMARK ENERGY OPERATING, LLC	1	7,440	2000-07-26
532	42-445-31923	HIGHMARK ENERGY OPERATING, LLC	1	7,365	2000-07-26
564	42-445-31924	HIGHMARK ENERGY OPERATING, LLC	1	7,420	2000-07-26
564L	42-445-31924	HIGHMARK ENERGY OPERATING, LLC	1	7,420	2000-07-26
564U	42-445-31924	HIGHMARK ENERGY OPERATING, LLC	1	7,420	2000-07-26
584	42-445-31925	HIGHMARK ENERGY OPERATING, LLC	1	7,365	2000-07-26
296	42-445-31915	HIGHMARK ENERGY OPERATING, LLC	1	7,300	2000-03-23
536	42-445-31914	HIGHMARK ENERGY OPERATING, LLC	1	7,450	2000-03-23
552	42-445-31917	HIGHMARK ENERGY OPERATING, LLC	1	7,270	2000-03-23
577	42-445-31913	HIGHMARK ENERGY OPERATING, LLC	1	7,315	2000-03-23
585	42-445-31916	HIGHMARK ENERGY OPERATING, LLC	1	7,365	2000-03-23
295	42-445-31890	HIGHMARK ENERGY OPERATING, LLC	1	7,400	1999-10-29
555	42-445-31889	HIGHMARK ENERGY OPERATING, LLC	1	7,360	1999-10-29
594	42-445-31888	HIGHMARK ENERGY OPERATING, LLC	1	7,450	1999-10-29
667	42-445-31723	HIGHMARK ENERGY OPERATING, LLC	2	7,100	1999-10-29
181	42-445-31311	HIGHMARK ENERGY OPERATING, LLC	2	6,750	1999-08-23
181H	42-445-31311	HIGHMARK ENERGY OPERATING, LLC	2	6,750	1999-08-23
507	42-445-31882	HIGHMARK ENERGY OPERATING, LLC	1	7,360	1999-07-27
557	42-445-31881	HIGHMARK ENERGY OPERATING, LLC	1	7,360	1999-07-27
575	42-445-31879	HIGHMARK ENERGY OPERATING, LLC	1	7,360	1999-07-27
582	42-445-31878	HIGHMARK ENERGY OPERATING, LLC	1	7,360	1999-07-27
592	42-445-31880	HIGHMARK ENERGY OPERATING, LLC	2	7,400	1999-07-27
154	42-445-31075	HIGHMARK ENERGY OPERATING, LLC	2	7,100	1998-08-25
554	42-445-31840	HIGHMARK ENERGY OPERATING, LLC	1	7,400	1997-09-12
287	42-445-31841	HIGHMARK ENERGY OPERATING, LLC	1	7,400	1997-09-09
262	42-445-31834	HIGHMARK ENERGY OPERATING, LLC	1	7,400	1997-08-27
263	42-445-31835	HIGHMARK ENERGY OPERATING, LLC	1	7,400	1997-08-27
273	42-445-31836	HIGHMARK ENERGY OPERATING, LLC	1	7,400	1997-08-27
529	42-445-31837	HIGHMARK ENERGY OPERATING, LLC	1	7,400	1997-08-27
614	42-445-31838	HIGHMARK ENERGY OPERATING, LLC	1	7,400	1997-08-27
545	42-445-31819	HIGHMARK ENERGY OPERATING, LLC	1	7,400	1997-05-09
546	42-445-31816	HIGHMARK ENERGY OPERATING, LLC	1	7,400	1997-05-09
546L	42-445-31816	HIGHMARK ENERGY OPERATING, LLC	1	7,400	1997-05-09
546U	42-445-31816	HIGHMARK ENERGY OPERATING, LLC	1	7,400	1997-05-09
548	42-445-31817	HIGHMARK ENERGY OPERATING, LLC	1	7,400	1997-05-09
605	42-445-31818	HIGHMARK ENERGY OPERATING, LLC	1	7,400	1997-05-09
751	42-445-31804	HIGHMARK ENERGY OPERATING, LLC	1	7,250	1996-12-02
569	42-445-31786	HIGHMARK ENERGY OPERATING, LLC	1	7,150	1996-10-21
574	42-445-31787	HIGHMARK ENERGY OPERATING, LLC	1	7,150	1996-10-21
580	42-445-31788	HIGHMARK ENERGY OPERATING, LLC	1	7,150	1996-10-21
599	42-445-31789	HIGHMARK ENERGY OPERATING, LLC	1	7,150	1996-10-21
604	42-445-31790	HIGHMARK ENERGY OPERATING, LLC	2	7,150	1996-10-21
615	42-445-31791	HIGHMARK ENERGY OPERATING, LLC	1	7,500	1996-10-21
629	42-445-31792	HIGHMARK ENERGY OPERATING, LLC	1	7,150	1996-10-21
632	42-445-31793	HIGHMARK ENERGY OPERATING, LLC	1	7,150	1996-10-21
632L	42-445-31793	HIGHMARK ENERGY OPERATING, LLC	1	7,150	1996-10-21
632U	42-445-31793	HIGHMARK ENERGY OPERATING, LLC	1	7,150	1996-10-21
658	42-445-31794	HIGHMARK ENERGY OPERATING, LLC	1	7,150	1996-10-21
658L	42-445-31794	HIGHMARK ENERGY OPERATING, LLC	1	7,150	1996-10-21
659	42-445-31797	HIGHMARK ENERGY OPERATING, LLC	1	7,150	1996-10-21
689	42-445-31801	HIGHMARK ENERGY OPERATING, LLC	1	7,150	1996-10-21
695	42-445-31802	HIGHMARK ENERGY OPERATING, LLC	1	7,300	1996-10-21
716	42-445-31782	HIGHMARK ENERGY OPERATING, LLC	2	7,150	1996-10-16
716L	42-445-31782	HIGHMARK ENERGY OPERATING, LLC	2	7,150	1996-10-16
716U	42-445-31782	HIGHMARK ENERGY OPERATING, LLC	2	7,150	1996-10-16
718	42-445-31781	HIGHMARK ENERGY OPERATING, LLC	1	7,200	1996-10-16
719	42-445-31780	HIGHMARK ENERGY OPERATING, LLC	1	7,150	1996-10-16
721	42-445-31784	HIGHMARK ENERGY OPERATING, LLC	1	7,200	1996-10-16
723	42-445-31779	HIGHMARK ENERGY OPERATING, LLC	1	7,300	1996-10-16
749	42-445-31778	HIGHMARK ENERGY OPERATING, LLC	1	7,150	1996-10-16
755	42-445-31777	HIGHMARK ENERGY OPERATING, LLC	1	7,400	1996-10-16
757	42-445-31776	HIGHMARK ENERGY OPERATING, LLC	1	7,400	1996-10-16
694	42-445-31773	HIGHMARK ENERGY OPERATING, LLC	1	7,500	1996-10-04
720	42-445-31772	HIGHMARK ENERGY OPERATING, LLC	1	7,500	1996-10-04
722	42-445-31774	HIGHMARK ENERGY OPERATING, LLC	1	7,500	1996-10-04
722L	42-445-31774	HIGHMARK ENERGY OPERATING, LLC	1	7,500	1996-10-04
573	42-445-31763	HIGHMARK ENERGY OPERATING, LLC	1	7,070	1996-08-01
661	42-445-31764	HIGHMARK ENERGY OPERATING, LLC	1	7,110	1996-07-30
661L	42-445-31764	HIGHMARK ENERGY OPERATING, LLC	1	7,110	1996-07-30
661U	42-445-31764	HIGHMARK ENERGY OPERATING, LLC	1	7,110	1996-07-30
620	42-445-31765	HIGHMARK ENERGY OPERATING, LLC	2	8,000	1996-07-26
643	42-445-31766	HIGHMARK ENERGY OPERATING, LLC	2	7,500	1996-07-26
645	42-445-31767	HIGHMARK ENERGY OPERATING, LLC	2	7,500	1996-07-26
645W	42-445-31767	HIGHMARK ENERGY OPERATING, LLC	2	7,500	1996-07-26
648	42-445-31768	HIGHMARK ENERGY OPERATING, LLC	2	7,500	1996-07-26
571	42-445-31761	HIGHMARK ENERGY OPERATING, LLC	1	7,015	1996-07-02
601	42-445-31760	HIGHMARK ENERGY OPERATING, LLC	1	7,045	1996-07-02
603	42-445-31759	HIGHMARK ENERGY OPERATING, LLC	1	7,105	1996-07-02
631	42-445-31758	HIGHMARK ENERGY OPERATING, LLC	2	7,200	1996-07-02
691	42-445-31757	HIGHMARK ENERGY OPERATING, LLC	1	7,170	1996-07-02
691L	42-445-31757	HIGHMARK ENERGY OPERATING, LLC	1	7,170	1996-07-02
691U	42-445-31757	HIGHMARK ENERGY OPERATING, LLC	1	7,170	1996-07-02
693	42-445-31756	HIGHMARK ENERGY OPERATING, LLC	1	7,215	1996-07-02
725	42-445-31755	HIGHMARK ENERGY OPERATING, LLC	1	7,245	1996-07-02
727	42-445-31754	HIGHMARK ENERGY OPERATING, LLC	1	7,280	1996-07-02
576	42-445-31742	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1996-04-18
578	42-445-31743	HIGHMARK ENERGY OPERATING, LLC	1	7,025	1996-04-18
606	42-445-31744	HIGHMARK ENERGY OPERATING, LLC	1	7,025	1996-04-18
606L	42-445-31744	HIGHMARK ENERGY OPERATING, LLC	1	7,025	1996-04-18
606U	42-445-31744	HIGHMARK ENERGY OPERATING, LLC	1	7,025	1996-04-18
608	42-445-31745	HIGHMARK ENERGY OPERATING, LLC	1	7,075	1996-04-18
634	42-445-31746	HIGHMARK ENERGY OPERATING, LLC	1	7,050	1996-04-18
636	42-445-31747	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1996-04-18
660	42-445-31748	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1996-04-18
662	42-445-31749	HIGHMARK ENERGY OPERATING, LLC	1	7,125	1996-04-18
690	42-445-31750	HIGHMARK ENERGY OPERATING, LLC	1	7,125	1996-04-18
692	42-445-31751	HIGHMARK ENERGY OPERATING, LLC	1	7,150	1996-04-18
633	42-445-31725	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1995-08-01
633L	42-445-31725	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1995-08-01
633U	42-445-31725	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1995-08-01
635	42-445-31728	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1995-08-01
637	42-445-31726	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1995-08-01
663	42-445-31727	HIGHMARK ENERGY OPERATING, LLC	2	7,144	1995-08-01
665	42-445-31724	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1995-08-01
638	42-445-31720	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1995-07-17
640	42-445-31722	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1995-07-17
664	42-445-31719	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1995-07-17
610	42-445-31718	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1995-06-30
612	42-445-31717	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1995-06-30
286	42-445-31713	HIGHMARK ENERGY OPERATING, LLC	1	7,650	1995-03-21
292	42-445-31712	HIGHMARK ENERGY OPERATING, LLC	1	7,650	1995-03-21
292L	42-445-31712	HIGHMARK ENERGY OPERATING, LLC	1	7,650	1995-03-21
272	42-445-31631	HIGHMARK ENERGY OPERATING, LLC	2	7,000	1990-10-31
275	42-445-31630	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1990-10-31
265	42-445-31491	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1988-07-25
268	42-445-31490	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1988-07-25
269	42-501-33281	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1988-07-25
264	42-501-33282	HIGHMARK ENERGY OPERATING, LLC	2	7,000	1987-09-08
259	42-445-31468	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1987-05-20
260	42-445-31464	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1987-05-20
261	42-445-31469	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1987-05-20
266	42-445-31465	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1987-05-20
267	42-445-31466	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1987-05-20
32A	42-445-31467	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1987-05-20
202	42-445-31432	HIGHMARK ENERGY OPERATING, LLC	2	8,600	1986-07-08
138A	42-445-31414	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-12-17
257	42-445-31415	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-12-17
3A	42-445-31413	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-12-17
258	42-445-31411	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-12-09
2A	42-445-31410	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-12-09
209	42-445-31377	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-06-06
208	42-445-31376	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-06-03
226	42-445-31375	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-05-31
249	42-445-31374	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-05-15
232	42-445-31373	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-05-13
196	42-445-31371	HIGHMARK ENERGY OPERATING, LLC	1	6,800	1985-05-06
217	42-445-31369	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-05-02
176	42-445-31370	HIGHMARK ENERGY OPERATING, LLC	1	6,800	1985-04-29
178	42-445-31359	HIGHMARK ENERGY OPERATING, LLC	1	6,800	1985-04-29
180	42-445-31358	HIGHMARK ENERGY OPERATING, LLC	1	6,800	1985-04-29
184	42-445-31363	HIGHMARK ENERGY OPERATING, LLC	1	6,800	1985-04-29
185	42-445-31364	HIGHMARK ENERGY OPERATING, LLC	1	6,800	1985-04-29
189	42-445-31341	HIGHMARK ENERGY OPERATING, LLC	1	6,800	1985-04-29
197	42-445-31365	HIGHMARK ENERGY OPERATING, LLC	1	6,800	1985-04-29
200	42-445-31343	HIGHMARK ENERGY OPERATING, LLC	1	6,900	1985-04-29
201	42-445-31356	HIGHMARK ENERGY OPERATING, LLC	1	6,900	1985-04-29
207	42-445-31367	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-29
213	42-445-31349	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-29
218	42-445-31361	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-29
221	42-445-31362	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-29
222	42-445-31366	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-29
223	42-445-31354	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-29
224	42-445-31350	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-29
225	42-445-31352	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-29
227	42-445-31351	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-29
229	42-445-31353	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-29
236	42-445-31357	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-29
245	42-445-31348	HIGHMARK ENERGY OPERATING, LLC	1	7,050	1985-04-29
246	42-445-31360	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-29
252	42-445-31355	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-29
177	42-445-31330	HIGHMARK ENERGY OPERATING, LLC	1	6,800	1985-04-25
182	42-445-31329	HIGHMARK ENERGY OPERATING, LLC	1	6,750	1985-04-25
188	42-445-31310	HIGHMARK ENERGY OPERATING, LLC	1	6,800	1985-04-24
192	42-445-31309	HIGHMARK ENERGY OPERATING, LLC	1	6,750	1985-04-24
173	42-445-31328	HIGHMARK ENERGY OPERATING, LLC	1	6,800	1985-04-23
175	42-445-31331	HIGHMARK ENERGY OPERATING, LLC	1	6,800	1985-04-23
187	42-445-31332	HIGHMARK ENERGY OPERATING, LLC	1	6,750	1985-04-23
190	42-445-31336	HIGHMARK ENERGY OPERATING, LLC	1	6,900	1985-04-23
194	42-445-31342	HIGHMARK ENERGY OPERATING, LLC	1	6,900	1985-04-23
195	42-445-31327	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-23
199	42-445-31339	HIGHMARK ENERGY OPERATING, LLC	1	6,900	1985-04-23
203	42-445-31323	HIGHMARK ENERGY OPERATING, LLC	1	6,900	1985-04-23
204	42-445-31326	HIGHMARK ENERGY OPERATING, LLC	1	6,900	1985-04-23
206	42-445-31324	HIGHMARK ENERGY OPERATING, LLC	1	6,900	1985-04-23
211	42-445-31325	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-23
212	42-445-31316	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-23
215	42-445-31344	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-23
216	42-445-31340	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-23
219	42-445-31312	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-23
220	42-445-31318	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-23
228	42-445-31338	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-23
230	42-445-31345	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-23
231	42-445-31347	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-23
233	42-445-31317	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-23
234	42-445-31337	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-23
237	42-445-31300	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-23
238	42-445-31313	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-23
240	42-445-31315	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-23
241	42-445-31319	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-23
242	42-445-31320	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-23
244	42-445-31333	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-23
247	42-445-31346	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-23
250	42-445-31335	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-23
253	42-445-31322	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-23
254	42-445-31321	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-23
255	42-445-31334	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-23
205	42-445-31298	HIGHMARK ENERGY OPERATING, LLC	1	6,900	1985-04-22
243	42-445-31299	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-22
174	42-445-31308	HIGHMARK ENERGY OPERATING, LLC	1	6,800	1985-04-18
179	42-445-31305	HIGHMARK ENERGY OPERATING, LLC	1	6,800	1985-04-18
183	42-445-31304	HIGHMARK ENERGY OPERATING, LLC	1	6,800	1985-04-18
186	42-445-31303	HIGHMARK ENERGY OPERATING, LLC	1	6,900	1985-04-18
191	42-445-31302	HIGHMARK ENERGY OPERATING, LLC	1	6,750	1985-04-18
193	42-445-31307	HIGHMARK ENERGY OPERATING, LLC	1	6,800	1985-04-18
198	42-445-31301	HIGHMARK ENERGY OPERATING, LLC	1	6,800	1985-04-18
210	42-445-31306	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-18
214	42-445-31296	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-18
235	42-445-31297	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-18
239	42-445-31295	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-18
248	42-445-31293	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-18
251	42-445-31292	HIGHMARK ENERGY OPERATING, LLC	1	6,950	1985-04-18
256	42-445-31294	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1985-04-18
164A	42-445-31241	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1984-09-06
163A	42-445-31238	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1984-08-24
165A	42-445-31222	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1984-07-06
166	42-445-31223	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1984-07-06
167	42-445-31218	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1984-07-06
168	42-445-31225	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1984-07-06
169	42-445-31224	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1984-07-06
170	42-445-31221	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1984-07-06
171	42-445-31219	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1984-07-06
172	42-445-31220	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1984-07-06
159	42-501-32512	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1983-12-23
161	42-445-31182	HIGHMARK ENERGY OPERATING, LLC	1	7,015	1983-12-23
162	42-445-31181	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1983-12-23
157	42-445-31175	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1983-12-09
158	42-445-31174	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1983-12-09
150	42-445-31098	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1982-11-16
151	42-445-31096	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1982-11-16
152	42-445-31097	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1982-11-16
153	42-445-31100	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1982-11-16
156	42-445-31099	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1982-11-16
155	42-445-31076	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1982-08-03
149	42-445-31058	HIGHMARK ENERGY OPERATING, LLC	1	6,250	1982-05-18
149W	42-445-31058	HIGHMARK ENERGY OPERATING, LLC	1	6,250	1982-05-18
102	42-445-00452	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1981-03-10
102 L	42-445-00452	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1981-03-10
102 U	42-445-00452	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1981-03-10
118 L	42-445-00333	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1981-03-10
118 U	42-445-00333	HIGHMARK ENERGY OPERATING, LLC	1	7,000	1981-03-10
131	42-445-10234	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1981-03-10
142	42-445-30847	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1980-06-17
142L	42-445-30847	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1980-06-17
142U	42-445-30847	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1980-06-17
143	42-445-30844	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1980-06-17
144	42-445-30843	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1980-06-17
144 L	42-445-30843	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1980-06-17
144 U	42-445-30843	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1980-06-17
145 L	42-445-30848	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1980-06-17
145 U	42-445-30848	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1980-06-17
147	42-445-30845	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1980-06-17
147 L	42-445-30845	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1980-06-17
147 U	42-445-30845	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1980-06-17
146 L	42-445-30837	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1980-06-11
146 U	42-445-30837	HIGHMARK ENERGY OPERATING, LLC	1	7,100	1980-06-11
100 L	42-445-00460	HIGHMARK ENERGY OPERATING, LLC	--	--	--
100 U	42-445-00460	HIGHMARK ENERGY OPERATING, LLC	--	--	--
101	42-445-00449	HIGHMARK ENERGY OPERATING, LLC	--	--	--
105 L	42-445-00451	HIGHMARK ENERGY OPERATING, LLC	--	--	--
105 U	42-445-00451	HIGHMARK ENERGY OPERATING, LLC	--	--	--
106 A	42-445-00463	HIGHMARK ENERGY OPERATING, LLC	--	--	--
106B	42-445-30129	HIGHMARK ENERGY OPERATING, LLC	--	--	--
107A	42-445-00461	HIGHMARK ENERGY OPERATING, LLC	--	--	--
107B	42-445-30111	HIGHMARK ENERGY OPERATING, LLC	--	--	--
108	42-445-00464	HIGHMARK ENERGY OPERATING, LLC	--	--	--
109A	42-445-00241	HIGHMARK ENERGY OPERATING, LLC	--	--	--
109B	42-445-00225	HIGHMARK ENERGY OPERATING, LLC	--	--	--
11	42-445-30041	HIGHMARK ENERGY OPERATING, LLC	--	--	--
110A	42-445-00231	HIGHMARK ENERGY OPERATING, LLC	--	--	--
110B	42-445-00223	HIGHMARK ENERGY OPERATING, LLC	--	--	--
111 L	42-445-00220	HIGHMARK ENERGY OPERATING, LLC	--	--	--
111 U	42-445-00220	HIGHMARK ENERGY OPERATING, LLC	--	--	--
112A	42-445-00147	HIGHMARK ENERGY OPERATING, LLC	--	--	--
112B	42-445-00213	HIGHMARK ENERGY OPERATING, LLC	--	--	--
113A	42-445-00233	HIGHMARK ENERGY OPERATING, LLC	--	--	--
114A	42-445-00293	HIGHMARK ENERGY OPERATING, LLC	--	--	--
114B	42-445-00276	HIGHMARK ENERGY OPERATING, LLC	--	--	--
114BW	42-445-00276	HIGHMARK ENERGY OPERATING, LLC	--	--	--
115A	42-445-00295	HIGHMARK ENERGY OPERATING, LLC	--	--	--
115B	42-445-00279	HIGHMARK ENERGY OPERATING, LLC	--	--	--
116A	42-445-00490	HIGHMARK ENERGY OPERATING, LLC	--	--	--
116B	42-445-00326	HIGHMARK ENERGY OPERATING, LLC	--	--	--
116BW	42-445-00326	HIGHMARK ENERGY OPERATING, LLC	--	--	--
117A	42-445-00337	HIGHMARK ENERGY OPERATING, LLC	--	--	--
117B	42-445-00329	HIGHMARK ENERGY OPERATING, LLC	--	--	--
119 L	42-445-00336	HIGHMARK ENERGY OPERATING, LLC	--	--	--
119 U	42-445-00336	HIGHMARK ENERGY OPERATING, LLC	--	--	--
119W	42-445-00336	HIGHMARK ENERGY OPERATING, LLC	--	--	--
12	42-445-00446	HIGHMARK ENERGY OPERATING, LLC	--	--	--
120 L	42-501-01184	HIGHMARK ENERGY OPERATING, LLC	--	--	--
120 U	42-501-01184	HIGHMARK ENERGY OPERATING, LLC	--	--	--
121	42-501-01182	HIGHMARK ENERGY OPERATING, LLC	--	--	--
122 L	42-501-01183	HIGHMARK ENERGY OPERATING, LLC	--	--	--
122 U	42-501-01183	HIGHMARK ENERGY OPERATING, LLC	--	--	--
123A	42-445-00323	HIGHMARK ENERGY OPERATING, LLC	--	--	--
123B	42-445-00319	HIGHMARK ENERGY OPERATING, LLC	--	--	--
124A	42-445-00320	HIGHMARK ENERGY OPERATING, LLC	--	--	--
124B	42-445-00321	HIGHMARK ENERGY OPERATING, LLC	--	--	--
125A	42-445-00325	HIGHMARK ENERGY OPERATING, LLC	--	--	--
125B	42-445-00322	HIGHMARK ENERGY OPERATING, LLC	--	--	--
126A	42-445-00327	HIGHMARK ENERGY OPERATING, LLC	--	--	--
126B	42-445-00324	HIGHMARK ENERGY OPERATING, LLC	--	--	--
127A	42-445-00296	HIGHMARK ENERGY OPERATING, LLC	--	--	--
127B	42-445-00275	HIGHMARK ENERGY OPERATING, LLC	--	--	--
128A	42-445-00294	HIGHMARK ENERGY OPERATING, LLC	--	--	--
128B	42-445-00278	HIGHMARK ENERGY OPERATING, LLC	--	--	--
129	42-445-00214	HIGHMARK ENERGY OPERATING, LLC	--	--	--
12 L	42-445-00446	HIGHMARK ENERGY OPERATING, LLC	--	--	--
12 U	42-445-00446	HIGHMARK ENERGY OPERATING, LLC	--	--	--
130A	42-445-00235	HIGHMARK ENERGY OPERATING, LLC	--	--	--
130B	42-445-00227	HIGHMARK ENERGY OPERATING, LLC	--	--	--
132	42-445-10233	HIGHMARK ENERGY OPERATING, LLC	--	--	--
133W	42-445-00239	HIGHMARK ENERGY OPERATING, LLC	--	--	--
134W	42-445-00465	HIGHMARK ENERGY OPERATING, LLC	--	--	--
135	42-445-30016	HIGHMARK ENERGY OPERATING, LLC	--	--	--
136	42-445-00218	HIGHMARK ENERGY OPERATING, LLC	--	--	--
137	42-445-00221	HIGHMARK ENERGY OPERATING, LLC	--	--	--
137L	42-445-00221	HIGHMARK ENERGY OPERATING, LLC	--	--	--
137U	42-445-00221	HIGHMARK ENERGY OPERATING, LLC	--	--	--
138	42-445-30108	HIGHMARK ENERGY OPERATING, LLC	--	--	--
13 L	42-445-00561	HIGHMARK ENERGY OPERATING, LLC	--	--	--
13 U	42-445-00561	HIGHMARK ENERGY OPERATING, LLC	--	--	--
140	42-445-00448	HIGHMARK ENERGY OPERATING, LLC	--	--	--
141	42-445-30124	HIGHMARK ENERGY OPERATING, LLC	--	--	--
14 L	42-445-00562	HIGHMARK ENERGY OPERATING, LLC	--	--	--
14 U	42-445-00562	HIGHMARK ENERGY OPERATING, LLC	--	--	--
14 W	42-445-00562	HIGHMARK ENERGY OPERATING, LLC	--	--	--
15 L	42-445-00095	HIGHMARK ENERGY OPERATING, LLC	--	--	--
15 U	42-445-00095	HIGHMARK ENERGY OPERATING, LLC	--	--	--
163	42-445-00288	HIGHMARK ENERGY OPERATING, LLC	--	--	--
16 L	42-445-00096	HIGHMARK ENERGY OPERATING, LLC	--	--	--
16 U	42-445-00096	HIGHMARK ENERGY OPERATING, LLC	--	--	--
18BW	42-445-00224	HIGHMARK ENERGY OPERATING, LLC	--	--	--
18 L	42-445-00347	HIGHMARK ENERGY OPERATING, LLC	--	--	--
18L	42-445-00347	HIGHMARK ENERGY OPERATING, LLC	--	--	--
18 U	42-445-00347	HIGHMARK ENERGY OPERATING, LLC	--	--	--
19 L	42-445-00512	HIGHMARK ENERGY OPERATING, LLC	--	--	--
19 U	42-445-00512	HIGHMARK ENERGY OPERATING, LLC	--	--	--
20 L	42-445-00527	HIGHMARK ENERGY OPERATING, LLC	--	--	--
20 U	42-445-00527	HIGHMARK ENERGY OPERATING, LLC	--	--	--
21 L	42-445-00523	HIGHMARK ENERGY OPERATING, LLC	--	--	--
21 U	42-445-00523	HIGHMARK ENERGY OPERATING, LLC	--	--	--
22 L	42-445-00515	HIGHMARK ENERGY OPERATING, LLC	--	--	--
22 U	42-445-00515	HIGHMARK ENERGY OPERATING, LLC	--	--	--
23 L	42-445-00532	HIGHMARK ENERGY OPERATING, LLC	--	--	--
23 U	42-445-00532	HIGHMARK ENERGY OPERATING, LLC	--	--	--
25 L	42-445-00524	HIGHMARK ENERGY OPERATING, LLC	--	--	--
25 U	42-445-00524	HIGHMARK ENERGY OPERATING, LLC	--	--	--
26A	42-445-00522	HIGHMARK ENERGY OPERATING, LLC	--	--	--
26B	42-445-30014	HIGHMARK ENERGY OPERATING, LLC	--	--	--
27	42-445-00455	HIGHMARK ENERGY OPERATING, LLC	--	--	--
28W	42-445-00450	HIGHMARK ENERGY OPERATING, LLC	--	--	--
29	42-445-00457	HIGHMARK ENERGY OPERATING, LLC	--	--	--
3	42-445-00445	HIGHMARK ENERGY OPERATING, LLC	--	--	--
30 L	42-445-30047	HIGHMARK ENERGY OPERATING, LLC	--	--	--
30 U	42-445-30047	HIGHMARK ENERGY OPERATING, LLC	--	--	--
31 L	42-445-30040	HIGHMARK ENERGY OPERATING, LLC	--	--	--
31 U	42-445-30040	HIGHMARK ENERGY OPERATING, LLC	--	--	--
32	42-445-00273	HIGHMARK ENERGY OPERATING, LLC	--	--	--
33A	42-445-30037	HIGHMARK ENERGY OPERATING, LLC	--	--	--
33B	42-445-00277	HIGHMARK ENERGY OPERATING, LLC	--	--	--
34 L	42-445-30018	HIGHMARK ENERGY OPERATING, LLC	--	--	--
34 U	42-445-30018	HIGHMARK ENERGY OPERATING, LLC	--	--	--
36 L	42-445-00453	HIGHMARK ENERGY OPERATING, LLC	--	--	--
36 U	42-445-00453	HIGHMARK ENERGY OPERATING, LLC	--	--	--
36W	42-445-00453	HIGHMARK ENERGY OPERATING, LLC	--	--	--
37 L	42-445-00454	HIGHMARK ENERGY OPERATING, LLC	--	--	--
37 U	42-445-00454	HIGHMARK ENERGY OPERATING, LLC	--	--	--
37 W	42-445-00454	HIGHMARK ENERGY OPERATING, LLC	--	--	--
38 L	42-445-00518	HIGHMARK ENERGY OPERATING, LLC	--	--	--
38 U	42-445-00518	HIGHMARK ENERGY OPERATING, LLC	--	--	--
39 L	42-445-00520	HIGHMARK ENERGY OPERATING, LLC	--	--	--
39 U	42-445-00520	HIGHMARK ENERGY OPERATING, LLC	--	--	--
40 L	42-445-00526	HIGHMARK ENERGY OPERATING, LLC	--	--	--
40 U	42-445-00526	HIGHMARK ENERGY OPERATING, LLC	--	--	--
41 L	42-445-00528	HIGHMARK ENERGY OPERATING, LLC	--	--	--
41 U	42-445-00528	HIGHMARK ENERGY OPERATING, LLC	--	--	--
45 L	42-445-00525	HIGHMARK ENERGY OPERATING, LLC	--	--	--
45 U	42-445-00525	HIGHMARK ENERGY OPERATING, LLC	--	--	--
46 L	42-445-00519	HIGHMARK ENERGY OPERATING, LLC	--	--	--
46 U	42-445-00519	HIGHMARK ENERGY OPERATING, LLC	--	--	--
46W	42-445-00519	HIGHMARK ENERGY OPERATING, LLC	--	--	--
47 L	42-445-00535	HIGHMARK ENERGY OPERATING, LLC	--	--	--
47 U	42-445-00535	HIGHMARK ENERGY OPERATING, LLC	--	--	--
49 L	42-445-00516	HIGHMARK ENERGY OPERATING, LLC	--	--	--
49 U	42-445-00516	HIGHMARK ENERGY OPERATING, LLC	--	--	--
4 L	42-445-30017	HIGHMARK ENERGY OPERATING, LLC	--	--	--
4 U	42-445-30017	HIGHMARK ENERGY OPERATING, LLC	--	--	--
50 L	42-445-00514	HIGHMARK ENERGY OPERATING, LLC	--	--	--
50 U	42-445-00514	HIGHMARK ENERGY OPERATING, LLC	--	--	--
51A	42-445-00307	HIGHMARK ENERGY OPERATING, LLC	--	--	--
51B	42-445-00300	HIGHMARK ENERGY OPERATING, LLC	--	--	--
51BW	42-445-00300	HIGHMARK ENERGY OPERATING, LLC	--	--	--
52A	42-445-00312	HIGHMARK ENERGY OPERATING, LLC	--	--	--
52B	42-445-00297	HIGHMARK ENERGY OPERATING, LLC	--	--	--
53A	42-445-00317	HIGHMARK ENERGY OPERATING, LLC	--	--	--
53B	42-445-00302	HIGHMARK ENERGY OPERATING, LLC	--	--	--
53BW	42-445-00302	HIGHMARK ENERGY OPERATING, LLC	--	--	--
54 L	42-445-00306	HIGHMARK ENERGY OPERATING, LLC	--	--	--
54 U	42-445-00306	HIGHMARK ENERGY OPERATING, LLC	--	--	--
55 L	42-445-00286	HIGHMARK ENERGY OPERATING, LLC	--	--	--
55 U	42-445-00286	HIGHMARK ENERGY OPERATING, LLC	--	--	--
55 W	42-445-00286	HIGHMARK ENERGY OPERATING, LLC	--	--	--
56 L	42-445-00287	HIGHMARK ENERGY OPERATING, LLC	--	--	--
56 U	42-445-00287	HIGHMARK ENERGY OPERATING, LLC	--	--	--
56U	42-445-00287	HIGHMARK ENERGY OPERATING, LLC	--	--	--
57 L	42-445-00292	HIGHMARK ENERGY OPERATING, LLC	--	--	--
57 U	42-445-00292	HIGHMARK ENERGY OPERATING, LLC	--	--	--
58 L	42-445-00691	HIGHMARK ENERGY OPERATING, LLC	--	--	--
58 U	42-445-00691	HIGHMARK ENERGY OPERATING, LLC	--	--	--
59A	42-445-30027	HIGHMARK ENERGY OPERATING, LLC	--	--	--
59B	42-445-00690	HIGHMARK ENERGY OPERATING, LLC	--	--	--
5 L	42-445-00513	HIGHMARK ENERGY OPERATING, LLC	--	--	--
5 U	42-445-00513	HIGHMARK ENERGY OPERATING, LLC	--	--	--
60A	42-445-30026	HIGHMARK ENERGY OPERATING, LLC	--	--	--
60B	42-445-00283	HIGHMARK ENERGY OPERATING, LLC	--	--	--
61A	42-445-30025	HIGHMARK ENERGY OPERATING, LLC	--	--	--
61B	42-445-00282	HIGHMARK ENERGY OPERATING, LLC	--	--	--
62 L	42-445-00285	HIGHMARK ENERGY OPERATING, LLC	--	--	--
62 U	42-445-00285	HIGHMARK ENERGY OPERATING, LLC	--	--	--
63A	42-445-00309	HIGHMARK ENERGY OPERATING, LLC	--	--	--
63B	42-445-00305	HIGHMARK ENERGY OPERATING, LLC	--	--	--
63BW	42-445-00305	HIGHMARK ENERGY OPERATING, LLC	--	--	--
64A	42-445-00310	HIGHMARK ENERGY OPERATING, LLC	--	--	--
64B	42-445-00303	HIGHMARK ENERGY OPERATING, LLC	--	--	--
65A	42-445-00311	HIGHMARK ENERGY OPERATING, LLC	--	--	--
65B	42-445-00301	HIGHMARK ENERGY OPERATING, LLC	--	--	--
65BW	42-445-00301	HIGHMARK ENERGY OPERATING, LLC	--	--	--
66A	42-445-00308	HIGHMARK ENERGY OPERATING, LLC	--	--	--
66B	42-445-00304	HIGHMARK ENERGY OPERATING, LLC	--	--	--
67 L	42-445-00536	HIGHMARK ENERGY OPERATING, LLC	--	--	--
67 U	42-445-00536	HIGHMARK ENERGY OPERATING, LLC	--	--	--
67W	42-445-00536	HIGHMARK ENERGY OPERATING, LLC	--	--	--
68	42-445-00537	HIGHMARK ENERGY OPERATING, LLC	--	--	--
68 L	42-445-00537	HIGHMARK ENERGY OPERATING, LLC	--	--	--
68 U	42-445-00537	HIGHMARK ENERGY OPERATING, LLC	--	--	--
69 L	42-445-00538	HIGHMARK ENERGY OPERATING, LLC	--	--	--
69 U	42-445-00538	HIGHMARK ENERGY OPERATING, LLC	--	--	--
69W	42-445-00538	HIGHMARK ENERGY OPERATING, LLC	--	--	--
70 L	42-445-00539	HIGHMARK ENERGY OPERATING, LLC	--	--	--
70 U	42-445-00539	HIGHMARK ENERGY OPERATING, LLC	--	--	--
73 L	42-445-00245	HIGHMARK ENERGY OPERATING, LLC	--	--	--
73 U	42-445-00245	HIGHMARK ENERGY OPERATING, LLC	--	--	--
74	42-445-00506	HIGHMARK ENERGY OPERATING, LLC	--	--	--
75A	42-445-10236	HIGHMARK ENERGY OPERATING, LLC	--	--	--
75B	42-445-10237	HIGHMARK ENERGY OPERATING, LLC	--	--	--
76 L	42-445-00459	HIGHMARK ENERGY OPERATING, LLC	--	--	--
76 U	42-445-00459	HIGHMARK ENERGY OPERATING, LLC	--	--	--
77 L	42-445-00458	HIGHMARK ENERGY OPERATING, LLC	--	--	--
77 U	42-445-00458	HIGHMARK ENERGY OPERATING, LLC	--	--	--
79 L	42-445-00228	HIGHMARK ENERGY OPERATING, LLC	--	--	--
79 U	42-445-00228	HIGHMARK ENERGY OPERATING, LLC	--	--	--
79W	42-445-00228	HIGHMARK ENERGY OPERATING, LLC	--	--	--
80A	42-445-00240	HIGHMARK ENERGY OPERATING, LLC	--	--	--
80B	42-445-00222	HIGHMARK ENERGY OPERATING, LLC	--	--	--
81B	42-445-00224	HIGHMARK ENERGY OPERATING, LLC	--	--	--
81BW	42-445-00224	HIGHMARK ENERGY OPERATING, LLC	--	--	--
82A	42-445-00232	HIGHMARK ENERGY OPERATING, LLC	--	--	--
82B	42-445-00226	HIGHMARK ENERGY OPERATING, LLC	--	--	--
83A	42-445-00291	HIGHMARK ENERGY OPERATING, LLC	--	--	--
83B	42-445-00284	HIGHMARK ENERGY OPERATING, LLC	--	--	--
84A	42-445-30022	HIGHMARK ENERGY OPERATING, LLC	--	--	--
84B	42-445-00281	HIGHMARK ENERGY OPERATING, LLC	--	--	--
85A	42-445-30021	HIGHMARK ENERGY OPERATING, LLC	--	--	--
85B	42-445-00330	HIGHMARK ENERGY OPERATING, LLC	--	--	--
85BW	42-445-00330	HIGHMARK ENERGY OPERATING, LLC	--	--	--
86A	42-445-30013	HIGHMARK ENERGY OPERATING, LLC	--	--	--
86B	42-445-00331	HIGHMARK ENERGY OPERATING, LLC	--	--	--
88 L	42-445-30046	HIGHMARK ENERGY OPERATING, LLC	--	--	--
88 U	42-445-30046	HIGHMARK ENERGY OPERATING, LLC	--	--	--
90A	42-445-10247	HIGHMARK ENERGY OPERATING, LLC	--	--	--
90B	42-445-00332	HIGHMARK ENERGY OPERATING, LLC	--	--	--
90BW	42-445-00332	HIGHMARK ENERGY OPERATING, LLC	--	--	--
91A	42-445-00338	HIGHMARK ENERGY OPERATING, LLC	--	--	--
91B	42-445-00328	HIGHMARK ENERGY OPERATING, LLC	--	--	--
92A	42-445-00289	HIGHMARK ENERGY OPERATING, LLC	--	--	--
92B	42-445-00280	HIGHMARK ENERGY OPERATING, LLC	--	--	--
93A	42-445-00290	HIGHMARK ENERGY OPERATING, LLC	--	--	--
93B	42-445-00274	HIGHMARK ENERGY OPERATING, LLC	--	--	--
94A	42-445-00234	HIGHMARK ENERGY OPERATING, LLC	--	--	--
94B	42-445-00212	HIGHMARK ENERGY OPERATING, LLC	--	--	--
94BW	42-445-00212	HIGHMARK ENERGY OPERATING, LLC	--	--	--
95A	42-445-00238	HIGHMARK ENERGY OPERATING, LLC	--	--	--
95B	42-445-00216	HIGHMARK ENERGY OPERATING, LLC	--	--	--
96A	42-445-00242	HIGHMARK ENERGY OPERATING, LLC	--	--	--
96B	42-445-00219	HIGHMARK ENERGY OPERATING, LLC	--	--	--
97A	42-445-00243	HIGHMARK ENERGY OPERATING, LLC	--	--	--
97B	42-445-00230	HIGHMARK ENERGY OPERATING, LLC	--	--	--
98	42-445-00237	HIGHMARK ENERGY OPERATING, LLC	--	--	--
98A	42-445-00237	HIGHMARK ENERGY OPERATING, LLC	--	--	--
98B	42-445-30130	HIGHMARK ENERGY OPERATING, LLC	--	--	--
99A	42-445-10251	HIGHMARK ENERGY OPERATING, LLC	--	--	--
99B	42-445-10250	HIGHMARK ENERGY OPERATING, LLC	--	--	--

PRENTICE NORTHEAST 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 (621)

Production History