潘建国1, 黄林军1, 王国栋1, 郭娟娟1, 马永平1, 罗昭洋2
Pan Jian-guo1,Huang Lin-jun1,Wang Guo-dong1,Guo Juan-juan1,Ma Yong-ping1,Luo Zhao-yang2
摘要: 中国西部复杂叠合盆地主要发育多源多期的源外油气藏,可将其划分为源外近源油气藏和源外远源油气藏。虽然源外远源油气藏国内外勘探实例较多,但对其内涵和特征描述却不多见。为此以准噶尔盆地盆1井西凹陷为例,围绕“源、输、圈”三者之间的时空耦合关系,从动态成藏角度分析了凹陷北侧源外远源油气藏的特征及成藏规律,认为其具有远离生烃中心,在源输体系内油气单次或多次远距离聚集,且成藏期滞后于大规模排烃期等内涵特征。在油气二次运移或次生调整时期,源输体系与体系内圈闭的有效时空耦合是源外远源油气成藏的关键认识基础上,结合不同成藏时期及成藏构造带的形态变化规律,可将源输体系划分为稳定型和变迁型源输体系2类,变迁型源输体系又可细分为建设性变迁型源输体系和破坏性变迁型源输体系。研究指出基东鼻凸带两翼、陆梁隆起南翼、石南31至石西低凸带、盐131低凸带及侧翼值得下步远源高效勘探更多的关注。
中图分类号:
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