王家岗油田东部地区沙四段沉积体系研究

发布时间：2018-06-15 09:40

本文选题：东营凹陷 + 沙四段　；参考：《中国石油大学(华东)》2015年硕士论文

【摘要】：研究区位于东营凹陷南斜坡的东段,地理位置处于山东省东营市东营区以南,广饶县东北,研究区构造位置处于丁家屋子构造带与八面河构造带之间。研究目的层段为沙河街组沙四段,重点研究层段为沙四上亚段,地层埋深1250-1750m,地层厚度400-500m。本文以经典层序地层学理论为指导,综合应用岩心、测井、录井、地震及其它分析化验等资料,寻找在岩性、沉积相组合、电测曲线上、地震反射特征上产生的特殊响应,作为识别层序边界的良好标志,建立标准层,划分地层层序,建立研究区层序地层格架。将沙四上亚段划分为一个三级层序,建立了研究区沙四上亚段纯上段顶界T6’、底界T7、纯下段底界T7’,以及各砂组和小层的对比标准,将沙四上亚段细分为纯上亚段与纯下亚段,其中,纯上亚段分为6个砂层组,纯下亚段分为3个砂层组。本论文以沉积学理论为指导,确定了全区的典型岩心相标志,结合测井资料建立了对应的测井相标志,对各种沉积相及微相类型进行了精细划分,确定其中主要包括三角洲前缘相、碎屑岩滩坝相、碳酸盐滩坝相、滨浅湖相。通过岩心单井相、单井相综合分析、连井相和平面相分析等,确定研究区沉积相的展布特征,建立沉积相模式。研究区主要沉积相为滩坝沉积相,重点研究了滩坝砂体空间分布规律,明确了滩坝砂体的沉积特征及控制因素。认为滩坝砂体的形成与分布主要受古地貌、古物源、古水深和古水动力的控制作用。
[Abstract]:The study area is located in the east section of the south slope of Dongying Sag, located south of Dongying District, Shandong Province, and northeast of Guangrao County. The research area is located between the Dingjiahouse structural belt and the Bamianhe structural belt. The aim of the study is Shahejie formation, the fourth member of Shahejie formation, and the focus of the study is the upper part of Shahejie formation, with a depth of 1250-1750m and a thickness of 400-500m. Guided by the classical sequence stratigraphy theory, this paper synthetically applies core, logging, seismic and other analytical and laboratory data to search for special responses to seismic reflection characteristics in lithology, sedimentary facies assemblage and electrical logging curves. As a good sign to identify the sequence boundary, the standard layer is established, the stratigraphic sequence is divided and the sequence stratigraphic framework of the study area is established. In this paper, the upper submember of S4 is divided into a third order sequence, and the correlation criteria for the top boundary T6, bottom boundary T7, pure lower member T7 of pure upper member of the upper member of Sha 4 in the study area are established, as well as the correlation criteria of each sand formation and substratum. The upper submember of Sha 4 is subdivided into pure upper submember and pure lower submember, in which the pure upper submember is divided into 6 sand formations and the pure lower submember is divided into 3 sand formation groups. Under the guidance of sedimentology theory, the typical core facies marks in the whole area are determined, and the corresponding logging facies indicators are established in combination with logging data, and various sedimentary facies and microfacies types are carefully divided. It is determined that there are delta front facies, clastic beach dam facies, carbonate beach dam facies and shallow lacustrine facies. The distribution characteristics of sedimentary facies in the study area are determined and the sedimentary facies model is established by comprehensive analysis of core single well facies and even surface analysis of even well facies. The main sedimentary facies in the study area are beach and dam sedimentary facies. The spatial distribution law of beach bar sand body is studied emphatically, and the sedimentary characteristics and controlling factors of beach dam sand body are clarified. It is considered that the formation and distribution of sand bodies are mainly controlled by paleogeomorphology, ancient source, paleo water depth and paleohydrodynamic force.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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