Columbia River Basin Gas Project

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Rattlesnake Resources LLC

Rattlesnake Resources has developed a world-class natural gas exploration play in the Columbia River Basin of Washington State. Over 400,000 acres of leases have been acquired over anticlines that are among the largest prospective structures for the entrapment of natural gas remaining in North America. Reserve estimates of over 15 TCF of natural gas are postulated.

The basin is underlain by up to 12000 feet of Miocene aged basalt. Beneath the basalt there is estimated to be more than 20,000 feet of organic rich sedimentary rocks ranging in age from Late Cretaceous to Oligocene. Rich Cretaceous marine shales outcrop on the flank of the Blue Mountains. Early Tertiary rocks are primarily lacustrine to paludal sediments, which include coal beds. Drilling in the 1980's by Shell Oil demonstrated a sub-basalt Tertiary gas generative sedimentary basin. One well, the BN 1-9, tested combined rates of up to 5.7 mmcfd. The play is located in the Yakima Fold Belt of the Columbia Basin. The prospects are based on anticlines, which owing to the resistance of the basalt on the surface have been simply preserved as topographic ridges. Three anticlines have been leased:

1. Rattlesnake Hills

2. Saddle Mountain

3. Horse Heaven Hills

A shallow basalt play and a deeper sub-basalt play are presented.

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