Wayne K. Camp

Nelson (2009) prepared a nice compilation describing the wide range of pore-throat sizes that span a continuum from conventional sandstone reservoirs to unconventional tight-gas siliciclastic reservoirs and shale seals. In this article, Nelson (2009) proposes a new and rather unique definition for unconventional reservoirs (including tight-gas sands) that lacks sufficient supporting evidence or references to support this definition. Nelson (2009, p. 329) defines a conventional reservoir as, “…one in which evidence that buoyant force has formed and maintained the disposition of oil and gas is present,” and thus for unconventional reservoirs, it follows that Nelson concludes...

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