Abstract
A unified hypothesis concerning generation and migration of hydrocarbons and development of secondary porosity in sandstones is presented. Carbonic acid is considered to be the primary reagent responsible for dissolution in the development of secondary porosity in sandstones. The degree to which reservoir quality is enhanced by development of secondary porosity may be proportional to the amount of hyrocarbons generated as well as to the amount of unstable constituents during diagenesis. In some cases, formation of secondary porosity may be responsible not only for development of reservoir but also for a significant element of entrapment by the partial but areally and stratigraphically selective dissolution of sandstone in the migration path of hydrocarbons. (JMT)
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