鄂尔多斯盆地姬塬地区上三叠统延长组第六段高分辨率层序—岩相古地理HIGH-RESOLUTION SEQUENCE STRATIGRAPHY AND PALEOGEOGRAPHY OF THE INTERVAL 6 OF THE UPPER TRIASSIC YANCHANG FORMATION IN THE JIYUAN REGION,ORDOS BASIN
王昌勇,郑荣才,韩永林,王海红,梁晓伟,辛红刚
摘要(Abstract)：
姬塬地区处于鄂尔多斯盆地西部地区,晚三叠世延长期该地区处在北部的安边三角洲与西部的环县三角洲交汇部位。以高分辨率层序分析为指导思想,通过钻井岩芯、测井资料和地震等资料,分析该地区延长组长油层组多级次基准面旋回界面和湖泛面的成因类型及高分辨率层序地层学特征,将长6段河控三角洲沉积划分为1个长期、3个中期、10个短期和20个超短期旋回层序,比较了各级次层序的结构类型、叠加样式和分布模式,建立了等时地层对比格架,分析了砂岩在层序地层格架中的发育状况,编制了短期、超短期旋回相域的层序—岩相古地理图,描述了不同时期三角洲砂体的展布特征,对有利储层发育层位和区带进行了预测。
关键词(KeyWords)： 高分辨率层序;层序—岩相古地理;安边三角洲;环县三角洲;延长组;三叠系;姬塬地区;鄂尔多斯盆地
基金项目(Foundation): 国家重大专项“大型油气田及煤层气开发”(2008ZX05000-003-01)部分研究成果
作者(Author): 王昌勇,郑荣才,韩永林,王海红,梁晓伟,辛红刚
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