Reservoir engineering aspects of tight gas reservoir evaluation
Reservoir engineering aspects of tight gas reservoir evaluation
Reservoir engineering aspects of tight gas reservoir evaluation
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14‘Conventional’ vs 'Unconventional'Accumulations• Characteristics <strong>of</strong> ‘Conventional’ Accumulations– Relatively high matrix permeability– Obvious seals and traps– High recovery factors• Characteristics <strong>of</strong> ‘Unconventional’ Accumulations– Regional in extent– Diffuse boundaries– Low matrix permeabilities– Low recovery factors– Productivity <strong>of</strong> a <strong>tight</strong> <strong>gas</strong> <strong>reservoir</strong> is only 25% <strong>of</strong> <strong>gas</strong> in place in the best case(average 10-15%). Gas connectivity only in 4% <strong>of</strong> porosity.From John Lee (Texas A&M University)Advances in Unconventional Resources Technology: Assessment Methodology
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