曾母拉分盆地的油气成藏规律:廷贾-西巴兰线断裂的控制
发布时间：2019-05-09 22:48
【摘要】：南海南部廷贾-西巴兰线断裂是一条规模巨大的北西向走滑断裂,渐新世开始活动,早期具有强烈的右旋走滑特征,晚中新世以来走滑方向变为左旋,更新世至今,走滑方向变为右旋,是曾母盆地与北康盆地、南沙海槽的分界。为了理清廷贾-西巴兰线断裂特征与曾母盆地油气成藏的关系,通过对断裂两侧地震剖面特征、重磁特征、地热流分布特征以及地壳性质和岩石圈厚度的分析,探讨该断裂在曾母盆地形成演化及油气成藏中的控制作用。研究表明:断裂活动为曾母盆地后期的沉积提供了丰富的物源,断裂走滑作用导致曾母盆地具有良好的圈闭,后期的反向走滑使得盆地的沉积中心由南向北迁移;断裂沟通深部热源,有利于油气生成,形成的伴生断层是盆地油气运移的主要通道。
[Abstract]:The Tingjia-Sibalan line fault in the southern South China Sea is a large northwest strike-slip fault, which began to move in Oligocene and has strong right-handed strike-slip characteristics in the early stage. Since the late Miocene, the strike-slip direction has changed to a left-handed direction, and since the Pleistocene, The strike-slip direction becomes right-handed, which is the boundary between Zengmu basin, Beikang basin and Nansha trough. In order to clarify the relationship between the fault characteristics of Tingjia-Sibalan line and oil and gas accumulation in Zengmu Basin, the seismic profile characteristics, gravity and magnetic characteristics, geothermal flow distribution characteristics, crustal properties and lithosphere thickness on both sides of the fault are analyzed. The controlling role of the fault in the formation and evolution of Zengmu basin and oil and gas accumulation is discussed. The results show that the fault activity provides a rich source of sedimentary resources for the late Zengmu basin, and the fault strike-slip leads to a good trap in the Zengmu basin, and the late reverse strike-slip causes the sedimentary center of the basin to migrate from south to north. Faults communicate with deep heat sources and are beneficial to oil and gas generation. Associated faults are the main channels for oil and gas migration in the basin.
【作者单位】： 海底科学与探测技术教育部重点实验室;中国海洋大学海洋地球科学学院;
【基金】：国家自然科学基金杰出青年基金(41325009) 国家重点研发计划(2017YFC0601400-1) 山东省泰山学者特聘教授项目
【分类号】：P618.13
，
本文编号：2473149
[Abstract]:The Tingjia-Sibalan line fault in the southern South China Sea is a large northwest strike-slip fault, which began to move in Oligocene and has strong right-handed strike-slip characteristics in the early stage. Since the late Miocene, the strike-slip direction has changed to a left-handed direction, and since the Pleistocene, The strike-slip direction becomes right-handed, which is the boundary between Zengmu basin, Beikang basin and Nansha trough. In order to clarify the relationship between the fault characteristics of Tingjia-Sibalan line and oil and gas accumulation in Zengmu Basin, the seismic profile characteristics, gravity and magnetic characteristics, geothermal flow distribution characteristics, crustal properties and lithosphere thickness on both sides of the fault are analyzed. The controlling role of the fault in the formation and evolution of Zengmu basin and oil and gas accumulation is discussed. The results show that the fault activity provides a rich source of sedimentary resources for the late Zengmu basin, and the fault strike-slip leads to a good trap in the Zengmu basin, and the late reverse strike-slip causes the sedimentary center of the basin to migrate from south to north. Faults communicate with deep heat sources and are beneficial to oil and gas generation. Associated faults are the main channels for oil and gas migration in the basin.
【作者单位】： 海底科学与探测技术教育部重点实验室;中国海洋大学海洋地球科学学院;
【基金】：国家自然科学基金杰出青年基金(41325009) 国家重点研发计划(2017YFC0601400-1) 山东省泰山学者特聘教授项目
【分类号】：P618.13
，
本文编号：2473149
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