Historically, the exploration for oil and gas resources has focused on identifying structural and stratigraphic traps associated with conventional accumulations. The importance of source rocks was also recognized to understand their generative potential and the timing of hydrocarbon expulsion relative to the formation of those traps. In the past 20 yr, since unconventional resources started being developed economically, geoscientists have devoted a great deal of research and gained tremendous insights on hydrocarbon storage and flow capacity of source rocks as reservoirs. Horizontal drilling and multistage hydraulic fracturing technology that was initially developed in those shale plays are now being applied...

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