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Final Report - National Energy Technology Laboratory - U.S. ...

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Economic<br />

Characteristics:<br />

a. High inert gas content in Ohio, average Clinton-Medina Nitrogen content is 5.1%, Carbon Dioxide<br />

content is 0.1% (Hugman et al., 1993). In the Rome Trough and adjacent<br />

areas, very high inerts in natural gas have been reported from pre-Knox<br />

rocks, sometimes rendering the gas non-combustible (up to 78% Nitrogen)<br />

b. Recovery Low. Continuous-type accumulations are characterized by low individual<br />

well-production rates and small well-drainage area. Directional/horizontal<br />

wells are being drilled to reduce the number of well sites.<br />

c. Pipeline infrastructure very good There are numerous gas lines in the basin.<br />

d. Overmaturity none<br />

e. Basin maturity mature<br />

f. Sediment consolidation consolidation/porosity reduction occurs with depth of burial<br />

g. Porosity/completion<br />

problems<br />

tight sands. Improved hydraulic fracturing techniques in recent years resulted<br />

in higher gas recoveries.<br />

h. Permeability pre-Knox=1.0 md (Innerkip field, Oxford Co., Ontario)<br />

i. Porosity pre-Knox=3.5 to 22% (Innerkip field, Ontario)

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