Deep zones tight at Eel River basin well

Six flow tests in 10 rock units of deeper formations in northern California's Eel River basin indicated insufficient permeability to produce gas at commercial rates, said Foothills Resources.

By OGJ editors
HOUSTON, June 13 -- Six flow tests in 10 rock units of deeper formations in northern California's Eel River basin indicated insufficient permeability to produce gas at commercial rates, said Foothills Resources Inc., Bakersfield, Calif.

The company is hooking up its Grizzly Bluff-4 well, TD 9,530 ft, and plans to produce gas from the Pliocene Lower Rio Dell formation at 4,570-5,280 ft. Multiple sands tested gas at a combined rate of more than 500 Mcfd on a 10/64-in. choke.

Deeper Lower Rio Dell sands at 5,341-5,456 ft flowed at rates in excess of 900 Mcfd but will not be completed at present due to water production constraints. The company plans further study and likely future drilling in these sands.

The six deep flow tests were run in the Miocene Bear River and Pliocene Pullen and Eel River formations at 6,019-9,278 ft, where excellent gas shows were seen while drilling and logs indicated the presence of gas.

This is the second well drilled to this depth in the basin, and Foothills Resources will study whether the deeper zones and the Lower Rio Dell 15 and 16 zones may have potential elsewhere in the area.

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