沿层相干断裂分析技术及其在白云凹陷南缘的应用

发布时间：2018-03-14 10:27

本文选题：断裂特征　切入点：沿层相干分析　出处：《中国石油勘探》2017年05期 　论文类型：期刊论文

【摘要】：沿层相干技术能够客观反映某一特定时期断裂的平面展布。利用高精度沿层相干技术对珠江口盆地白云凹陷南缘三维研究区断裂特征进行分析,加深了对白云凹陷构造特征的认识。分析结果表明:下渐新统恩平组顶面(T_7~0)为区域不整合面,恩平组顶面以下以北东向断裂活动为主,在早渐新世停止活动;而恩平组顶面以上以北西向断裂活动为主,从始新世到中新世皆有活动。白云凹陷的断陷期结束于渐新世早期,之后长期表现为坳陷的特征。从研究区断裂与构造演化特征推断,下渐新统恩平组顶面(T_7~0)为白云凹陷的断坳转换界面,对白云深水区沉积演化与油气成藏具有重要意义。
[Abstract]:The coherence technique along the layer can objectively reflect the plane distribution of faults in a certain period of time. The fault characteristics of the three dimensional study area of Baiyun depression in the Pearl River mouth basin are analyzed by using the high precision layer coherence technique. The results show that the top surface of the lower Oligocene Enping formation is a regional unconformable surface, and the NE trending fault activity below the top surface of the Enping formation is the main one, which ceased in the early Oligocene. The fault activity above the top surface of the Enping formation is mainly northwestward, from Eocene to Miocene. The faulted period of Baiyun sag ended in the early Oligocene. From the characteristics of fault and tectonic evolution in the study area, it is inferred that the top surface of the lower Oligocene Enping formation is the transition interface of fault depression in Baiyun depression, which is of great significance for sedimentary evolution and hydrocarbon accumulation in Baiyun deep water area.
【作者单位】：中海油研究总院;
【基金】：国家科技重大专项“南海深水区油气资源潜力与大中型油气田勘探方向”(2016ZX05026007) 国家自然科学基金项目“南海深海地质演变对油气资源的控制作用”(91528303)
【分类号】：P618.13

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