发明名称 |
Method for explosively expanding a pillar for forming an in situ oil shale retort |
摘要 |
An in situ oil shale retort is formed in a subterranean formation containing oil shale, a horizontally extending void is excavated within the boundaries of the retort site leaving a zone of unfragmented formation above and/or below such a void, at least one pillar of unfragmented formation is left within the side boundaries of such a void for providing temporary support for overburden above the void, such a pillar is explosively expanded so that a principal portion of the pillar fragments travel to the side boundaries of the void and such a zone of unfragmented formation is explosively expanded toward the void. Accumulation of sufficient pillar fragments adjacent the side boundaries of the retort can substantially offset a tendency for fragments of the expanded zone of formation to form a mound thereby forming a fragmented permeable mass of formation particles within the retort with a reasonably flat upper surface. Such a fragmented permeable mass is retorted in situ to produce shale oil.
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申请公布号 |
US4290649(A) |
申请公布日期 |
1981.09.22 |
申请号 |
US19790092173 |
申请日期 |
1979.11.07 |
申请人 |
OCCIDENTAL OIL SHALE, INC. |
发明人 |
RICKETTS, THOMAS E. |
分类号 |
E21B43/248;E21B43/30;E21C41/24;(IPC1-7):E21C41/10 |
主分类号 |
E21B43/248 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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