鄂尔多斯盆地中东部太原组灰岩沉积相分析  

Sedimentary facies analysis of Taiyuan Formation limestonein central and eastern Ordos Basin

作　　者：高星 傅于恒[3] 赵伟波 殷杰[3] 陈娟萍[1,2] 代榕[4] Gao Xing;Fu Yuheng;Zhao Weibo;Yin Jie;Chen Juanping;Dai Rong(National Engineering Laboratory for Exploration and Development of Low Permeability Oil and Gas Fields,Xi′an 710018,China;Research Institute of Exploration and Development,PetroChina Changqing Oilfield Company,Xi′an 710018,China;School of Geoscience,Yangtze University,Wuhan 430100,China;Key Laboratory of Exploration Technologies for Oil and Gas Resources,Yangtze University,Wuhan 430100,China)

机构地区：[1]低渗透油气田勘探开发国家工程实验室,陕西西安710018 [2]中国石油长庆油田分公司勘探开发研究院,陕西西安710018 [3]长江大学地球科学学院,湖北武汉430100 [4]长江大学油气资源与勘探技术教育部重点实验室,湖北武汉430100

出　　处：《能源与环保》2023年第6期127-134,141,共9页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：国家自然科学基金项目(41672099);低渗透油气田勘探开发国家工程实验室开放基金资助项目(ZY21-XA409-FW956)。

摘　　要：为明确鄂尔多斯盆地太原组灰岩沉积相的展布特征,通过岩心观察、薄片鉴定、测井曲线的综合分析,对鄂尔多斯盆地中东部太原组灰岩进行了岩石学特征及沉积环境的研究。研究表明,灰岩沉积主要发育在太原组毛儿沟段和斜道段,平面上集中在研究区中部,最大厚度大于45 m;在毛儿沟段和斜道段沉积时期,研究区北部主要发育泥坪和砂坪微相的混合沉积,灰岩沉积主要发育在潮下带的灰坪和生屑滩微相,岩性以泥晶生屑灰岩和泥晶灰岩为主;研究区中北部在潮下带灰坪沉积背景下,发育面积较大的生物丘沉积微相,岩性以藻凝块灰岩为主。鄂尔多斯盆地中东部太原组灰岩沉积展布特征可以为下一步碳酸盐岩天然气藏储层的评价提供参考。In order to clarify the distribution characteristics of sedimentary facies of Taiyuan Formation limestone in Ordos Basin,the petrological characteristics and sedimentary environment of Taiyuan Formation limestone in central and eastern Ordos Basin were studied by comprehensive analysis of core observation,thin section identification and logging curves.The results show that limestone is mainly developed in Maoergou and Xiedao members of Taiyuan Formation.The limestone is concentrated in the middle of the study area with a maximum thickness of more than 45 m.During the sedimentary of Maoergou and Xiedao members,the mixed deposits of mud tidal flat and sand tidal flat microfacies are mainly developed in the northern part of the study area.The limestone is mainly developed in the subtidal zone,and the lithology is mainly micritic bioclastic limestone in the subtidal zone and micrite in the intertidal zone.In the middle and northern part of the study area,there are large bioherm microfacies under the grey tidal flat sedimentary background,and the lithology is mainly algal tuff limestone.The prediction of sedimentary facies distribution of Taiyuan Formation in the middle and eastern Ordos Basin can provide reference for the evaluation of carbonate gas reservoirs.

关 键 词：鄂尔多斯盆地 上古生界 太原组 灰岩 潮坪相 

分 类 号：P618.13[天文地球—矿床学]