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PROCESS FOR FORMING A RETURN TO SHALE OLEIFERO AND PROCESS FOR THE RECOVERY OF LIQUID AND GASEOUS PRODUCTS FROM AN UNDERGROUND FORMATION CONTAINING SHALE OLEIFERO
PROCESS FOR FORMING A RETURN TO SHALE OLEIFERO AND PROCESS FOR THE RECOVERY OF LIQUID AND GASEOUS PRODUCTS FROM AN UNDERGROUND FORMATION CONTAINING SHALE OLEIFERO
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机译:返还页岩油的过程以及从包含页岩油的地下地层中回收液体和气态产物的过程
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摘要
Formation is excavated from within a retort site in formation containing oil shale for forming a plurality of vertically spaced apart voids extending horizontally across different levels of the retort site, leaving a separate zone of unfragmented formation between each pair of adjacent voids. Explosive is placed in each zone, and such explosive is detonated in a single round for forming an in situ retort containing a fragmented permeable mass of formation particles containing oil shale. The same amount of formation is explosively expanded upwardly and downwardly toward each void. A horizontal void excavated at a production level has a smaller horizontal cross-sectional area than a void excavated at a lower level of the retort site immediately above the production level void. Explosive in a first group of vertical blast holes is detonated for explosively expanding formation downwardly toward the lower void, and explosive in a second group of vertical blast holes is detonated in the same round for explosively expanding formation upwardly toward the lower void and downwardly toward the production level void for forming a generally T-shaped bottom of the fragmented mass.
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