岩性油气藏 ›› 2020, Vol. 32 ›› Issue (4): 2335.doi: 10.12108/yxyqc.20200403
朱珍君1, 黄光明1, 邱津1, 刘康宁1, 李琦2, 胡俊杰3
ZHU Zhenjun1, HUANG Guangming1, QIU Jin1, LIU Kangning1, LI Qi2, HU Junjie3
摘要: 哈萨克斯坦斋桑盆地是中亚地区重要的含油气盆地之一,由于构造复杂导致油气富集规律认识不清,在一定程度上限制了该地区的油气勘探开发进程。基于精细的三维地震解释,结合构造演化与生烃过程、源储配置关系,通过分析盆地内不同区域不同时期的构造活动强度与油气勘探结果,对斋桑盆地的构造特征和油气成藏模式进行了系统研究。结果表明:斋桑盆地自二叠纪以来共经历了4期构造沉降和4期构造挤压反转,目前盆地形态以挤压构造为主要特征,发育叠瓦构造、对冲构造、冲起构造等多种构造样式;侏罗纪末期的逆冲断层活动控制了主区、北东区和K区的构造形态雏形,上新世末期断层再次发生挤压逆冲造就了现今的构造形态;斋桑盆地可大致分为3次大的成藏期;深层油气藏为自生自储型地层油气藏、岩性油气藏,浅层气藏分布主要受控于深层油藏的分布规模及喜山期形成的浅层逆冲背斜、断背斜等有利圈闭;印支期的构造运动对斋桑盆地的油气成藏起了非常重要的控制作用,具体表现为印支期构造运动强烈(三叠系被严重剥蚀或者该期逆冲活动强烈)的三维S井区、K构造和二维东区的M井区域,其圈闭普遍为空圈闭,钻井试油基本出水,而已钻遇的油气藏均位于印支期构造活动较弱区域。综合以上研究认为,盆地东部北缘和东部南缘应是斋桑盆地未来寻找油气藏的有利区。
中图分类号:
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