發(fā)布時間：2019-05-09 22:48

【摘要】：南海南部廷賈-西巴蘭線斷裂是一條規(guī)模巨大的北西向走滑斷裂,漸新世開始活動,早期具有強烈的右旋走滑特征,晚中新世以來走滑方向變?yōu)樽笮?更新世至今,走滑方向變?yōu)橛倚?是曾母盆地與北康盆地、南沙海槽的分界。為了理清廷賈-西巴蘭線斷裂特征與曾母盆地油氣成藏的關(guān)系,通過對斷裂兩側(cè)地震剖面特征、重磁特征、地?zé)崃鞣植继卣饕约暗貧ば再|(zhì)和巖石圈厚度的分析,探討該斷裂在曾母盆地形成演化及油氣成藏中的控制作用。研究表明:斷裂活動為曾母盆地后期的沉積提供了豐富的物源,斷裂走滑作用導(dǎo)致曾母盆地具有良好的圈閉,后期的反向走滑使得盆地的沉積中心由南向北遷移;斷裂溝通深部熱源,有利于油氣生成,形成的伴生斷層是盆地油氣運移的主要通道。
[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.
【作者單位】： 海底科學(xué)與探測技術(shù)教育部重點實驗室;中國海洋大學(xué)海洋地球科學(xué)學(xué)院;
【基金】：國家自然科學(xué)基金杰出青年基金(41325009) 國家重點研發(fā)計劃(2017YFC0601400-1) 山東省泰山學(xué)者特聘教授項目
【分類號】：P618.13
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本文編號：2473149