THE CHIMNEY EFFECTS OF HYDROCARBON ACTIVITY
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摘要: 构造相对活跃地区,深部已形成的油气聚集,通过断层和裂缝里向上窜,大部分可能散失于地表,部分被封盖截流成为各种较浅的次生油气藏,有其特定的油气规律.本文着重研究烟囱作用的烃源基础、通道和动力、截流的阻抗形式、岩层致密化程度等成藏机理,突出探索次生富集油气田的地质条件.Abstract: When a deep-seated hydrocarbon accumulation had formed in a structurally active area,the hydrocarbons will migrate vertically up through a fault or a fracture,the major part of which was apt to lose to the surface,but the minor part was cut off by the caprocks to form into various shallower secondary oil/gas pools with their specific oil-gas laws.The study highlights pool-forming mechanisms related to chimney effects such as the basis of hydrocarbon source,conduits and power,the impedance type of cutoff process,the compactness of rocks etc;and mainly approaches to the geological conditions for the oil/gas fields of secondary enrichment.
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