【摘 要】
：
板内中小滑移距走滑断裂因产状高陡、变形微弱,其地震识别与地质解析一直以来是构造领域研究的难点和重点.为加深对此类走滑断裂发育特征的认识,以塔里木克拉通盆地内部顺北4号走滑断裂为例,利用最新采集处理的高精度三维地震资料,对其空间结构及演化过程进行了精细解析,认为顺北4号断裂具有“平面分段多样性、纵向变形差异性、构造演化多期性”的特点,石油地质条件优越.研究结果表明:顺北4号断裂横跨塔北隆起、顺托果勒低隆起、塔中隆起3大构造单元,全长超过280 km,基于走向变化可将三维研究区内的顺北4号断裂划分为南段(NE
【机 构】
：
中国石油化工股份有限公司石油勘探开发研究院,北京100083;中国石油化工股份有限公司石油勘探开发研究院,北京100083;中国石油化工股份有限公司西北油田分公司,新疆乌鲁木齐830011;马永生科学
论文部分内容阅读
板内中小滑移距走滑断裂因产状高陡、变形微弱,其地震识别与地质解析一直以来是构造领域研究的难点和重点.为加深对此类走滑断裂发育特征的认识,以塔里木克拉通盆地内部顺北4号走滑断裂为例,利用最新采集处理的高精度三维地震资料,对其空间结构及演化过程进行了精细解析,认为顺北4号断裂具有“平面分段多样性、纵向变形差异性、构造演化多期性”的特点,石油地质条件优越.研究结果表明:顺北4号断裂横跨塔北隆起、顺托果勒低隆起、塔中隆起3大构造单元,全长超过280 km,基于走向变化可将三维研究区内的顺北4号断裂划分为南段(NE48°)、中段(NE28°)、北段(NE42°),各段之间叠接面积超2 km2,南段和北段以叠接压隆构造发育为主,中段以叠接拉分构造发育为主;顺北4号断裂纵向自下而上发育“寒武系—中奥陶统高陡走滑断层”+“上奥陶统—石炭系雁列正断层”的分层变形样式,下部高陡断面在3个刚性—塑性岩性地层分界面普遍呈现走滑分段性,其中中—下奥陶统碳酸盐岩顶部可识别出13个断面,平均长度为8 km,上覆雁列正断层的活动强度与下部高陡走滑断层的应变分段性质有关;顺北4号断裂共经历了3期左行走滑活动,加里东中期Ⅲ幕在塔北—塔中体系对接过程中多段拼贴发育,加里东晚期和海西中—晚期均为雁列正断层活动,在三维研究区内呈现“南北弱、中部强”的活动特征.
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