Most of today’s producing naturally fractured reservoirs were discovered accidentally; they were found by somebody who was looking for some other type of reservoir. That is one reason we should revisit the subject of how to explore for these reservoirs. Another is because (I am convinced) significant volumes of hydrocarbons reside in these reservoirs—particularly in fields abandoned because of improper testing and evaluation or because the wells did not intersect the natural fractures.
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Roberto Aguilera (1998) studied this question.