松辽盆地西斜坡青二段底部高频层序格架内岩性圈闭研究  

Lithologic Traps Study in High Frequency Sequence Stratigraphic Framework of No.2 Sections Clino form in the West Slope of Songliao Basin

作　　者：王殿举 李一赫[2] 顾海燕[3] 葛云龙[2] 

机构地区：[1]北京大学地球空间与科学学院 [2]东北石油大学地球科学学院 [3]大庆油田有限责任公司勘探开发研究院

出　　处：《国外测井技术》2016年第2期39-43,3-4,共5页World Well Logging Technology

摘　　要：松辽盆地西部斜坡东北部地区青山口组二段底部高四砂组发育的三角洲前缘砂体,具备形成构造-岩性圈闭的良好条件。本文运用高分辨率层序地层分析方法,以次级湖泛面为界将研究区青山口组二段底部划分为一个下降半旋回的湖泊扩张域(Eg4)和一个完整旋回的湖泊萎缩域(Sg4),两套三角洲前缘砂体岩性主要由砂岩、泥岩、少量灰岩以及与其过渡类型岩石构成,砂岩为主,泥岩次之,灰岩很少。在二维地震资料追踪三角洲前缘的尖灭线,并通过地震属性和井点数据对该地区沉积相进行分析,研究表明,青二段湖泊萎缩域相对湖泊扩张域三角洲进积作用进一步增强,三角洲前缘砂体发育,规模大。通过砂体与构造叠合看,构造与砂体匹配,其构造背景具有鼻状构造形态,三角洲前缘条状带在西侧形成岩体变化带,可形成构造-岩性圈闭。通过对有利圈闭目标区内所有钻井的录井显示、测井解释结果统计分析,在构造高部位的井油气显示活跃,含油性较好,测井解释有油气层、差油气层。The delta front sand body, developing at the bottom of the high Sisha group of Qingshan port group in western slope of Songliao basin in the northeast area, has good conditions for forming lithologic traps. Using high resolution sequence stratigraphy, the bottom of the two stage of the research area is divided into a decline semi cyclic extension field(Eg4), and a complete cycle of lake area(Sg4). The two sets of delta front sand bodies are mainly composed of sandstone, mudstone, a small amount of limestone and its transitional type. In the2 D seismic data, the tip of the delta front is tracked, and the sedimentary facies is analyzed by seismic attributes and well point data.The research shows that the delta front is further enhanced by the shrinking of the two stages, and the delta front sand body develops.Through the sand body and the structure, the structure and the sand body match, its structure background has the nose shape formation,the delta front strip belt in the west side forms the rock mass change belt, can form the structure and the lithologic trap. Statistical analysis of well logging and interpretation results in the target area of favorable traps indicate that oil and gas show in the high well structure is active with good oil content.

关 键 词：西斜坡 高频层序 沉积微相 岩性圈闭 

分 类 号：P618.13[天文地球—矿床学]