| 山东惠民凹陷中央隆起带古近系沙三段层序地层及沉积演化? |
| |
| 引用本文： | 操应长,姜在兴,李春华,全升吉.山东惠民凹陷中央隆起带古近系沙三段层序地层及沉积演化?[J].古地理学报,2002,4(3):40-46. |
| |
| 作者姓名： | 操应长 姜在兴 李春华 全升吉 |
| |
| 作者单位： | 1.中国科学院广州地球化学研究所 广东广州 510640;2.石油大学（华东）地球资源与信息学院 山东东营 257061;3.胜利油田有限公司 山东东营 257060 |
| |
| 基金项目： | 惠民凹陷中央隆起西部沙三、四段沉积体系、储层展布及油气预测研究 (获 2 0 0 0年山东省科技进步二等奖 )项目资助 |
| |
| 摘 要： | 根据山东惠民盆地中央隆起带古近系沙河街组第三段层序地层学研究，根据层序中湖平面变化特点和相应的沉积物特征，提出了陆相湖盆中层序内体系域的四分法，一个完整的层序由低位、湖侵、高位和下降四个体系域组成，并且层序界面位于湖平面最大下降的位置，介于下降域和低位域之间。层序地层中存在四个关键性界面：首泛面、最大湖泛面、始降面和最大下降面，其中首泛面对应于湖水由相对稳定到快速上升时的初始湖泛面，为低位域与湖侵域间的分界面；最大湖泛面对应于湖水快速上涨至最大限度时的湖泛面，为湖侵域与高位域间的分界面，在界面附近多形成特征的CS段；始降面对应于湖平面开始快速下降时的沉积界面，为高位域与下降域的分界面；最大下降面也是层序界面，为湖盆水体快速下降或湖盆岸线快速退到最低点时的沉积界面。结合研究区的岩芯、录井、测井、地震等资料综合分析，本文总结了四个关键面的识别标志。中央隆起带沙三段沉积共划分出六个体系域，分属三个层序。本文以层序II沉积为例，阐述了不同体系域的沉积体系特征，低位期湖盆水域面积小，河流-三角洲沉积体系发育，河流流经距离长，边缘地区形成似下切谷沉积；湖侵期发育小规模的退积式三角洲沉积，砂体较不发育；高位期湖盆水域面积大，砂体以深水浊积砂体为特征；下降期多发育进积式砂体，砂体发育。因此，位于层序界面之下的下降域和之上的低位域是湖盆砂体有利发育期，湖侵域和高位域是生油岩主要形成时期。
|
| 关 键 词： | 山东 古近系 沉积演化 层序地层 下降体系域 界面 砂体 惠民凹陷 |
| 文章编号： | 1671-1505(2002)03-0040-07 |
| 修稿时间： | 2001年11月25 |
SEQUENCE STRATIGRAPHY AND DEPOSITIONAL EVOLUTION OF THE MEMBER 3 OF SHAHEJIE FORMATION IN THE WESTERN HUIMIN DEPRESSION OF SHANDONG PROVINCE |
| |
| Cao Yingchang , Jiang Zaixing Li Chunhua Quan Shengji Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou ,Guangdong Faculty of Geo-Resources and Information,University of Petroleum.SEQUENCE STRATIGRAPHY AND DEPOSITIONAL EVOLUTION OF THE MEMBER 3 OF SHAHEJIE FORMATION IN THE WESTERN HUIMIN DEPRESSION OF SHANDONG PROVINCE[J].Journal of Palaeogeography,2002,4(3):40-46. |
| |
| Authors: | Cao Yingchang Jiang Zaixing Li Chunhua Quan Shengji Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou Guangdong Faculty of Geo-Resources and Information University of Petroleum |
| |
| Institution: | 1.Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou，Guangdong 510640;2.Faculty of Geo-Resources and Information, University of Petroleum, Dongying, Shandong 257061;3.Shengli Oil Field Limited Company, Dongying,Shandong 257060 |
| |
| Abstract: | The sequence stratigraphy studies of the third member of the Shahejie Formation(SHA-3) in the western of Huimin basin, Shandong province indicates that it is more suitable to divide a sequence into four systems tracts in the lacustrine basin including low stand systems tract(LST), lake-transgressive systems tract(TST), high stand systems tract(HST) and falling-stage systems tract(FSST), according to the characteristics of the lake level change and its corresponding sediments. The sequence boundary is located between LST and FSST. There are four key surfaces in a sequence: first flooding surface, maximal flooding surface, first falling surface and maximal falling surface. The first flooding surface is located between LST and TST, and is corresponded to the sedimentary boundary while the lake water change from the relatively stable stage to the quickly rising stage. The maximal flooding surface is located between TST and HST, and condensation section (CS) usually forms near the surface. The first falling surface is located between HST and FSST, and is corresponded to the sediment boundary while the lake level begins quickly falling. The maximal falling surface is also the sequence boundary, and is corresponded to the sediment boundary while the lake level falls quickly to the lowest location. This paper has summed up the identical marks on the cores, well loggings, seismic data and so on. SHA-3 member of the central uplift belt can be divided into six systems tracts and three sequences. The distribution characteristics of different systems tract are discussed in Sequence II. During LST the area of lake water is small, and the river-delta deposition system develops, and the river is usually very long, and invised valleys also develop at the margin region of the lake basin. TST develops some small regressive deltas, and sandbodies is less. During HST the area of lake water is large, the main sandbody is some deep-water turbidity sands. FSST develops abundant transgressive deltas. So sandbody develops well during FSST and LST, and oil rocks form most during TST and HST. |
| |
| Keywords: | sequence stratigraphy falling stage system tract boundary sandbody Huimin Depression |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《古地理学报》浏览原始摘要信息 |
| 点击此处可从《古地理学报》下载免费的PDF全文 |
|
