Top Sligo – 14,000 Ft Depth Resource Area: 2,440 Acre Net Pay Thickness: 150 ft In-Place: 360 BCF / 1.8 MMBO

Mid Sligo – 16,000 Ft Depth Resource Area: 2,280 Acre Net Pay Thickness: 75 ft In-Place: 139 BCF / 279 MBO

Cotton Valley Lime – 18,800 Ft Depth Resource Area: 2,000 Acre Net Pay Thickness: 80 ft In-Place: 248 BCF / 248 MBO

Top Cotton Valley – 17,500 Ft Depth Resource Area: 2,140 Acre Net Pay Thickness: 83 ft In-Place: 178 BCF / 178 MBO

Mid Sligo

Cotton Valley Sand

Top Sligo

Top Salt

Cotton Valley Lime Smackover

Eagle Ford / Buda

Olmos

REGIONAL MAP

Deep Penetrations

LA SALLE McMULLEN

STS AREA

PanAm – Alamo Nat’l Bank #1

Higher Porosity

Zone

Cotton Valley Lime

TXO C-1 Washburn Mudlog

Bypass Shaker

Mole % Gas

Pearsall

Sligo

Texaco (Amerada) Craig

Pearsall

Sligo

Open Hole Completion Actual Flow 10.6 MMCFPD Cumm 1.236 BCF in 1957

Top Cotton Valley Time-Structure Map

Mid Sligo

Cotton Valley Sand

Top Sligo

Top Salt

PROPOSED WELL-PATH