塔里木盆地顺托果勒地区中下奥陶统鹰山组与一间房组沉积相与旋回地层  

Sedimentary facies and cyclic stratigraphy of Yingshan and Yijianfang Formations of Lower-Middle Ordovician in Shuntuoguole Area,Tarim Basin

作　　者：赵锐[1] 赵腾 李慧莉[1] 焦存礼[1] 高晓鹏[1] 赵学琴 ZHAO Rui;ZHAO Teng;LI Huili;JIAO Cunli;GAO Xiaopeng;ZHAO Xueqin(Petroleum Exploration and Production Research Institute,SINOPEC,Beijing 100083,China;School of Geosciences,China University of Petroleum(Beijing),Beijing 102249)

机构地区：[1]中国石化石油勘探开发研究院,北京100083 [2]中国石油大学(北京)地球科学学院,北京102249

出　　处：《东北石油大学学报》2019年第4期1-16,I0001,共17页Journal of Northeast Petroleum University

基　　金：国家科技重大专项(2017ZX05005-002)

摘　　要：塔里木盆地中下奥陶统地层主要由碳酸盐旋回组成。分析顺托果勒地区钻井资料和沉积相,识别研究区沉积相类型;根据藻屑颗粒结构比例,划分沉积旋回;根据垂向岩相、旋回叠置样式和可容纳空间变化,识别研究区旋回层序。结果表明:研究区识别两种主要的沉积相类型,分别是半局限潮下带和开阔潮下带,在顺北和顺南地区进一步分别划分为7种(LF1~LF7)和10种(L1~L10)岩石微相;识别两种类型的旋回,分别是半局限浅水—中潮下旋回和开阔中—深水旋回,第一种旋回发育于鹰山组上段和一间房组下段地层,第二种旋回主要发育于一间房组上段地层;识别8个三级层序(Sq4—Sq11),由下部海进域和上部高位域组成,可以进一步划分为下部稳定/海侵段和上部海侵段两段。该结果对研究塔里木盆地顺托果勒地区沉积演化过程具有指导意义。The Lower-Middle Ordovician strata in Tarim Basin are mainly composed of carbonate cycles.The drilling data and sedimentary facies in Shuntuoguole Area are analyzed to identify the types of sedimentary facies in the study area;the sedimentary cycles are divided according to the proportion of algal debris grain structure;and the cyclic sequences in the study area are identified according to the vertical lithofacies,cyclic overlapping patterns and accommodation space changes.The results show that two main types of sedimentary facies are identified in the study area,semi-limited subtidal zone and open subtidal zone,and further divided into 7 and 10 rock microfacies in Shunbei and Shunnan Areas respectively.The two types of cycles are identified as semi-limited shallow-mid-tide subtidal cycle and open-mid-deep-water cycle.The first cycle develops in the upper part of Yingshan Formation and lower part of Yijianfang Formation.The second cycle is mainly developed in the upper part of the Yijianfang Formation.Eight third-order sequences are identified,which are composed of lower transgression and upper high-level domains,and can be further divided into lower stable/transgressive and upper transgressive sections.The results are of guiding significance in the study of sedimentary evolution in Shuntuoguole Area,Tarim Basin.

关 键 词：沉积相 旋回地层 层序 海平面变化 地层对比 中下奥陶统 塔里木盆地 

分 类 号：TE121.3[石油与天然气工程—油气勘探] P618.13[天文地球—矿床学]