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CHARACTERISTICS OF GAS CHIMNEY AND ITS RELATIONSHIP TO GAS HYDRATE IN QIONGDONGNAN BASIN
Author(s): 
Pages: 103-108
Year: Issue:  3
Journal: MARINE GEOLOGY & QUATERNARY GEOLOGY

Keyword:  气烟囱天然气水合物流体势地震剖面琼东南盆地;
Abstract: 气烟囱是由于天然气(或流体)垂向运移在地震剖面上形成的异常反射,是气藏超压、构造低应力和泥页岩封隔层综合作用而形成.气烟囱在形成过程中携带大量富含甲烷气的流体向上运移到天然气水合物稳定带,其形成之后仍可作为后期活动的油气向上运移的特殊通道.在中中新世后,气烟囱是琼东南盆地气体向上运移的通道.地震识别出的似海底反射(BSR)分布区存在大量的气烟囱构造,通过速度、泥岩含量、流体势等属性参数及钻井资料,判断该烟囱构造为有机成因的泥底辟型烟囱构造.
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