录井工程 ›› 2024, Vol. 35 ›› Issue (1): 112-118.doi: 10.3969/j.issn.1672-9803.2024.01.018
申荣荣①,②, 赵永刚①,②, 唐明远③, 阴旭航①,②, 杜家满①,②, 于明航①,②
SHEN Rongrong①,②, ZHAO Yonggang①,②, TANG Mingyuan③, YIN Xuhang①,②, DU Jiaman①,②, YU Minghang①,②
摘要: 鄂尔多斯盆地DND气田中奥陶统马家沟组自下而上划分为6段,其中马五段是该气田下古生界主要产气层,随着对DND气田马五段气藏的开发力度不断加大,马五6-马五10亚段的小层精细划分已日益迫切。为此在继承鄂尔多斯盆地中东部马五1-马五5亚段小层成熟划分方案的基础上,利用岩心、薄片、录井、测井资料针对研究区136口井的马五段尤其是马五6、马五7亚段进行亚段及小层的精细划分,寻找并确定标志层,利用对碳酸盐岩岩性敏感的光电吸收截面指数曲线区分石灰岩与白云岩地层,将自然伽马、自然电位、声波时差等多种测井响应结合识别碳酸盐岩岩性段。研究表明:目前可将马家沟组马五段划分出10个亚段和21个小层;马五6亚段“四分”,厚度范围为4.6~13.3 m,平均值8.8 m;马五7亚段“三分”,厚度范围为5.9~15.3 m,平均值9.8 m。马五6、马五7亚段小层精细划分在鄂尔多斯盆地尚属首次,将为DND气田及其他气田的马家沟组中组合气藏小层划分提供重要参考。
中图分类号:
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