SOUTH LAKE TRAMMEL UNIT

Oil · District 7B · Lease #11281

Operator: SHENANDOAH PETROLEUM CORPORATION

Cum Oil

217k BBL

Cum Gas

465k MCF

casinghead

Wells

54

Production

1993-01 — 2026-04

Peak Month

2012-03

Production History

Cum Oil: 217,489 BBL Cum Gas: 465,242 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

3,110 BBL/mo

Di (annual)

68.5%

b-factor

0.7

EUR

135,981 BBL

R-squared

0.943

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
2003-07 — 2004-01 SHENANDOAH PETROLEUM CORPORATION 7 mo
1995-12 — 2003-06 LAVANCO ENERGY, INC. 91 mo
1995-03 — 1995-11 ALLEGRO OPERATING, INC. 9 mo
1993-01 — 1995-02 BETWELL OIL & GAS COMPANY 26 mo

Wells (54)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
14GRAYROCK ENERGY II, LLC16,0002011-08-19
33GRAYROCK ENERGY II, LLC16,0002011-08-19
21GRAYROCK ENERGY II, LLC16,0002011-06-24
103GRAYROCK ENERGY II, LLC16,0002011-05-30
104GRAYROCK ENERGY II, LLC16,0002011-05-30
65GRAYROCK ENERGY II, LLC16,0002007-07-19
62GRAYROCK ENERGY II, LLC15,9001996-07-15
64GRAYROCK ENERGY II, LLC27,2001996-06-17
58GRAYROCK ENERGY II, LLC15,5001995-12-12
59GRAYROCK ENERGY II, LLC25,9001995-12-12
57GRAYROCK ENERGY II, LLC15,5001995-05-17
5WSGRAYROCK ENERGY II, LLC16,9011983-02-02
49GRAYROCK ENERGY II, LLC15,4001982-11-03
50GRAYROCK ENERGY II, LLC15,4001982-11-03
51GRAYROCK ENERGY II, LLC15,4001982-11-03
52GRAYROCK ENERGY II, LLC15,4001982-11-03
53GRAYROCK ENERGY II, LLC15,4001982-11-03
54GRAYROCK ENERGY II, LLC15,4001982-11-03
55GRAYROCK ENERGY II, LLC15,4001982-11-03
56GRAYROCK ENERGY II, LLC15,4001982-11-03
142-353-01544GRAYROCK ENERGY II, LLC------
1042-353-01409GRAYROCK ENERGY II, LLC------
1242-353-01537GRAYROCK ENERGY II, LLC------
1542-353-01547GRAYROCK ENERGY II, LLC------
1642-353-00357GRAYROCK ENERGY II, LLC------
1742-353-10105GRAYROCK ENERGY II, LLC------
1842-353-01579GRAYROCK ENERGY II, LLC------
1942-353-01576GRAYROCK ENERGY II, LLC------
242-353-01581GRAYROCK ENERGY II, LLC------
2042-353-01534GRAYROCK ENERGY II, LLC------
2342-353-01545GRAYROCK ENERGY II, LLC------
2442-353-00360GRAYROCK ENERGY II, LLC------
2542-353-00359GRAYROCK ENERGY II, LLC------
2742-353-10066GRAYROCK ENERGY II, LLC------
2942-353-00402GRAYROCK ENERGY II, LLC------
342-353-01412GRAYROCK ENERGY II, LLC------
3042-353-01392GRAYROCK ENERGY II, LLC------
3242-353-01398GRAYROCK ENERGY II, LLC------
3442-353-01004GRAYROCK ENERGY II, LLC------
3542-353-01402GRAYROCK ENERGY II, LLC------
3642-353-10068GRAYROCK ENERGY II, LLC------
3742-353-10065GRAYROCK ENERGY II, LLC------
3842-353-10062GRAYROCK ENERGY II, LLC------
3942-353-00788GRAYROCK ENERGY II, LLC------
4042-353-01671GRAYROCK ENERGY II, LLC------
4142-353-01393GRAYROCK ENERGY II, LLC------
4442-353-10063GRAYROCK ENERGY II, LLC------
4542-353-10084GRAYROCK ENERGY II, LLC------
4642-353-01394GRAYROCK ENERGY II, LLC------
4742-353-10064GRAYROCK ENERGY II, LLC------
542-353-01577GRAYROCK ENERGY II, LLC------
642-353-01408GRAYROCK ENERGY II, LLC------
842-353-01543GRAYROCK ENERGY II, LLC------
942-353-01411GRAYROCK ENERGY II, LLC------