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通过古生物对比、地球物理响应特征分析与泥岩特征、粒度分析、砂岩百分含量等方面资料的综合应用,结合区域地质背景,证实渤海海域新近系存在浅水湖泊相沉积。研究表明,该区在湖泊沉积的背景下,还存在着浅水三角州沉积体系,该沉积体系较冲击河流沉积和正常三角洲沉积有着更为独特的沉积控制因素和沉积特征,主要表现在前缘亚相(水下河道、水下河口坝、前缘席状砂等微相),浅水三角洲前缘亚相相带宽广,砂体展布明显带有方向性。
Through the comprehensive application of palaeontology, geophysical response characteristics analysis and mudstone characteristics, grain size analysis and percentage of sandstone, combined with the regional geological background, it is confirmed that there is shallow lacustrine facies deposition in the Neogene of the Bohai Sea. The study shows that there are still shallow water delta sedimentary systems in this area under the background of lacustrine sedimentation. The sedimentary system has more unique sedimentary control factors and sedimentary characteristics than the impingement fluvial sediments and normal delta sediments, mainly in the frontier subfacies (Submarine channel, underwater mouth bar, foreground sands and other microfacies). The shallow facies delta facies have a wide distribution of subphase and facies, and the distribution of sand bodies is obviously directional.