2017年第2期（总第230期）
doi:10.3969/j. issn. 1009 3230. 2017. 02. 002
应用能源技术
7
金湖凹陷南部阜三段一阜四段沉积相及其演化研究
陈传浩，陈清华，张晶晶
（中国石油大学（华东）地球科学与技术学院，山东青岛266580）
摘要：通过对岩石类型、况积构造和测井相进行综合分析，系统研究了金湖凹陷南部阜三段-阜四段沉积相类型及演化模式。研究表明：阜三段时期盆地主要发育三角洲前缘一前三角洲一滨浅湖况积，物源来源于张八岭隆起和建湖隆起，根据沉积层序特征进一步划分水下分流河道、水下河道间湾、河口坝、远砂坝、前缘席状砂、前三角洲泥以及滨浅湖泥微相。西南部汉洞斜坡带主要发育为柔形三角洲况积，东北部发育长形三角洲沉积。草四段沉积期盆地基底沉降，湖平面上升，在汉涧斜坡常发育小型三角洲，东北部为滨浅湖一半深湖相沉积。研究区沉积旋回总体表现为进积一+退积一→进积一→退积的演化模式，砂体的分布范国经历扩大一→缩小一→扩大 →缩小的变化趋势，表明况积相的演化规律对砂体的发育特征具有控制作用。
关键词：金湖凹陷南部；阜三段；阜四段；沉积相；沉积模式
中图分类号：TE121.31
文献标志码：B
文章编号：10093230(2017)02-000207
Sedimentary Facies and Evolution of the Third and Fourth Members
of Funing Formation in Southern of Jinhu Sag
CHEN Chuan-hao，CHEN Qing-hua，ZHANG Jing-jing
(School of Geosciences in China University of Petroleum,Qingdao 266580, Shandong Province, China)
Abstract: The sedimentary facies and evolution of the third and fourth members of Funing Formation in Southem of Jinhu sag are studied through comprehensive analyses of rock types, grain size, sedimentary structural features and logging facies. The study shows that delta front, prodelta, shore shallow lake sedimentary systems were developed in the third member of Funing Formation in researched areaand can be further divided into sedimentary microfacies of underwater distributary channel, mouth bar, distal bar, frontal sand sheet, underwater distributary interchannel, predelta mud and mud in shore shallow lake. The sediments were derived from Zhang baling uplift and Jianhu uplift. The base of the basin subsided with lake transgression in the fourth member of Funing Formation sedimentary period. The small delta was developed in Chajian slope and the northeast part developed shore shallow lake, semi deep lake facies. The evolution model of sedimentary cycle was progradation retrogradation progradation retrogradation and variation trend of the Sand body distribution was increasing decreasing increasing decreasing. It shows the growth characteristics of sand body were controlled by the evolution rule of sedimentary facies. Key words: Southerm of Jinhu sag; Third member of Funing Formation; Fourth member of Funing formation; Sedimentary facies; Sedimentary mode
0引言
金湖凹陷是苏北盆地重要的含油气凹陷，自收稿日期：2016-12-15
修订日期：2017-01-11
基金项目：国家青年科技基金（E1501051）
作者简介：陈传浩（1991-），男，领士研究生，现主要从事构造
地质学与油气地质勘探方面的学习和研究工作。
万方数据
1975年经过三十多年的油气勘探开发历程，主要含油气构造带和含油层位逐步确定1]。阜宁组沉积时期金湖凹陷构造活动以张性剪切和拉张交互为主，期间发育3次张剪-拉张交替构造活动。早期为初始裂陷阶段，湖盆发育一系列NE向宽