南堡凹陷南部物源古近系沙一段沉积特征

发布时间：2018-10-09 17:49

【摘要】：通过沉积构造、岩石类型、粒度、测井特征等分析,认为南堡凹陷南部物源古近系沙一段主要发育辫状河三角洲前缘沉积,主要沉积微相类型为水下分流河道、水下分流河道侧缘、水下分流间湾、河口坝,并局部发育深水滑塌浊积扇、滨浅湖滩坝微相以及滨浅湖沉积。其中:水下分流河道砂体在平面上多呈条带状、片状分布;河口坝及滨浅湖滩坝在平面上主要呈椭圆状、土豆状或不规则状分布在水下分流河道的末端;水下分流河道侧缘在河道主体边侧呈条带状、席状分布;深水滑塌浊积扇主要呈不规则状分布在边界处或者河道砂体之外,整体呈现出辫状河三角洲前缘与滨浅湖的沉积组合,其物源来自南西方向。断裂、古地貌及物源供给方式是影响南堡凹陷南部物源沉积相发育及分布的重要因素。
[Abstract]:Based on the analysis of sedimentary structures, rock types, granularity and logging characteristics, it is considered that the first member of the provenance Paleogene in the south of Nanpu depression is mainly composed of braided river delta front sediments, and the main sedimentary microfacies are subaqueous distributary channels. The lateral edge of underwater distributary channel, underwater distributary bay, estuarine dam, and local deep water slump turbidite fan, shoreline shallow lake beach dam microfacies and shoreline shallow lake deposit. The sand bodies of underwater distributary channel are mostly striped and flaky on the plane, the estuarine dam and shoreline beach dam are mainly ellipsoidal on the plane, and the potato or irregular distribution is at the end of the underwater distributary channel. The lateral edge of underwater distributary channel is striped and sheet distributed in the main side of the channel, the deep water sloughing turbidite fan is mainly distributed irregularly at the boundary or outside the channel sand body, and the whole shows the sedimentary combination of braided river delta front and shallow shore lake. Its source comes from the south-west direction. Fault, paleogeomorphology and provenance supply mode are important factors affecting the development and distribution of provenance sedimentary facies in the south of Nanpu sag.
【作者单位】：中国石油冀东油田分公司勘探开发研究院;
【基金】：国家科技重大专项课题“南堡凹陷油气富集规律与增储领域”(2016ZX05006-006) 中石油股份公司科技重大专项“南堡及外围第四次油气资源评价”(2014E-050211)
【分类号】：P618.13

【相似文献】