冀中坳陷蠡县斜坡沙一下亚段碳酸盐岩滩坝沉积特征  

Sedimentary characteristics of carbonate beach bars in the lower part of the first member of Shahejie Formation of Lixian slope of Jizhong Depression

作　　者：杨剑萍[1] 李亚 陈瑶 邓爱居[3] 李凤群[3] 黄志佳[3] 

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [2]斯伦贝谢(中国)公司,北京100015 [3]中国石油天然气股份有限公司华北油田分公司采油三厂,河北河间062450

出　　处：《西安石油大学学报（自然科学版）》2014年第6期21-28,7,共8页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家油气重大专项(编号:2011ZX05006-002)

摘　　要：冀中坳陷蠡县斜坡沙一下亚段发育薄层碳酸盐岩沉积,在岩心观察描述、镜下分析鉴定的基础上,结合测井、分析化验等资料,系统探讨了蠡县斜坡沙一下亚段碳酸盐岩沉积特征及沉积模式。研究表明:蠡县斜坡古近系沙一下亚段发育碳酸盐岩滩坝沉积,可以划分为颗粒滩和灰泥坪2种沉积微相,鲕粒灰岩、生物碎屑灰岩、藻砂屑灰岩和泥晶灰岩是主要的岩石类型。研究区碳酸盐岩的发育,主要受相对湖平面升降、陆源碎屑供应程度和古地貌等因素的影响,高部位的高能环境主要发育颗粒滩沉积,低部位的低能环境发育灰泥坪沉积。在沉积特征和控制因素分析的基础上,建立了研究区碳酸盐岩滩坝沉积模式,为类似陆相含油气盆地的碳酸盐岩储层预测提供可借鉴的地质模型。The sedimentary characteristics and the sedimentary modes of the thin carbonate sediment developed in the lower part of the first member of Shahejie Formation of Lixian slope of Jizhong Depression are studied based on core description,thin section analysis and the analysis of logging data and laboratory test.The research result shows that carbonate beach bars are developed in the lower part of the first member of Shahejie Formation.There are two types of sedimentary microfacies of grain beach and lime mud lake-bay,and the main rock types are oolitic limestone,bioclastic limestone,algae calcarenite,and micrite.The rising-falling alternation of lake level,the supply of terrigeous clastic and ancient landfonn affected the development of carbonate rocks in the studied area.The grain beaches mainly developed in high terrain under high energy environment,whereas lime mud lake-bays mainly developed in low terrain under low energy environment.Finally,the sedimentary mode of the carbonate beach bars is established on the basis of the comprehensive analysis of sedimentary characteristics and controlling factors,which can provide reference for the prediction of the carbonate reservoirs in similar continental hydrocarbon basins.

关 键 词：沉积特征 碳酸盐岩滩坝 沙一段 蠡县斜坡 冀中坳陷 

分 类 号：TE122[石油与天然气工程—油气勘探]