论文部分内容阅读
辽东湾南部东营组二段下部发育一套斜交前积结构地层,通过单井精细沉积作用分析和三维地震资料综合解释与分析,认为该套沉积是一套强制湖退沉积体,主要由于东营组二段沉积时期湖平面强烈下降形成。强制湖退沉积体在区域上可以识别出6期三角洲前积体依次前积叠覆,并发育一系列下切谷,在三角洲前缘部位还发育滑塌沉积,但三角洲顶积层不发育,这些特征与国内外典型强制海退沉积体的表现特征非常相似。采用正演模拟方法对强制湖退沉积作用形成机制进行了分析。辽东湾南部东营组二段强制湖退沉积体的发现,有助于该地区东营组一段及东营组二段区域地层解释与对比,对于开拓该地区油气勘探思路和推动岩性地层油气藏勘探具有一定的战略意义。
A set of diagonal intersecting pre-structural strata are developed in the lower part of the second member of Dongying Formation in the southern part of Liaodong Bay. Based on the analysis of single-well fine sedimentation and the comprehensive interpretation and analysis of three-dimensional seismic data, this set of sediments is considered as a forcing lake retreat sediment, mainly due to Dongying During the sedimentary period of the second member of the Group, the lake level decreased strongly. Forced retreat sediments in the area can be identified in the Precamentary sediments of the 6th Delta, followed by a series of undercut valleys, slump deposits also developed in the delta front but undeveloped delta, these The characteristics are similar to those of the typical forcibly returned sediments at home and abroad. The forward modeling method is used to analyze the forming mechanism of retreating sedimentation in compulsory lake. The discovery of the forcing lake retreat sediments in the second member of Dongying Formation in the southern part of Liaodong Bay contributes to the interpretation and comparison of the strata of the first member of Dongying Formation and the second member of Dongying Formation in the area and is of great significance to the development of oil and gas exploration ideas and exploration of lithologic stratigraphic reservoirs in this area A certain strategic significance.