大庆石油地质与开发2018，Vol.37Issue(1)：31-39,9.DOI:10.19597/J.ISSN.1000-3754.201705009
鄂尔多斯盆地南缘长10—长9油层组沉积特征
SEDIMENTARY CHARACTERISTICS OF CHANG 10-CHANG 9 OIL GROUP IN THE SOUTHERN MARGIN OF ORDOS BASIN
摘要
Abstract
Triassic Yanchang Formation in Ordos Basin is one of the main exploration targets.Based on the detail exploration of the outcrop profile in the southern margin of Ordos Basin,combined with the previous research results,the lithology,the rock-association,the sedimentary facies characteristics as well as the time-space evolution were analyzed.The results show that there are 9 kinds of the lithological facies were classified for Chang 10-Chang 9 oil group in the southern margin of Ordos Basin,and 3 types of the sedimentary facies were developed:meandering stream,meandering river delta and braided river delta.For the former,4 types of the microfacies were developed:river bed sedimentation,side beach,natural barrier as well as the flood fan;for the middle,5 types of microfacies were developed:underwater distributary channel,underwater natural barrier,distributary bay,estuary dam as well as the far bar;for the latter,2 types of the microfacies were developed:underwater distributary channel and distributary interchannel.From Chang 10 to Chang 9 oil group,the vertical sedimentary sequence has the characteristics of the coarse-fine-coarse composite rhythm;the sandbodies of the meandering stream and the delta front are the main positions for the oil and gas migration and accumulation.关键词
露头剖面/长10—长9油层组/沉积特征/沉积演化/鄂尔多斯盆地南缘Key words
outcrop section/Chang 10-Chang 9 oil group/sedimentary characteristic/sedimentary evolution/the southern margin of Ordos Basin分类
能源科技引用本文复制引用
户瑞宁,操应长,葸克来,毛治国,吴松涛,马志国..鄂尔多斯盆地南缘长10—长9油层组沉积特征[J].大庆石油地质与开发,2018,37(1):31-39,9.基金项目
中国石油科学研究与技术开发项目“复杂储集体储层非均质性特征与评价技术”(2016B-0304). （2016B-0304）
