摘要
根据义马地区的具体情况,我们仅采用两个参数——ρ_s 和γ的测井曲线组合分析义马组的沉积环境。通过详细研究测井曲线组合特征,义马组可识别三种主要的沉积体系,即:冲积扇体系,湖滨三角洲体系和湖泊体系。其中每一体系又可划分许多亚相,我们对各个亚相的电测曲线组合特征作了详细的描述。在垂向上,义马组沉积相的演化表现为从底部到顶部由冲积扇体系→湖滨三角洲体系→湖泊体系。
Due to the concrete conditions of Yi-ma region,sedimentary environments have been analysed only by log association of two par a meters-ps and γ. Through studying the characteristics of log association in de tail,three main depositional systems have been recognized in Yi- ma Group.They are coarse clastic alluvial fan system,lake de- lta system and lake system.Each of them could be divided into many subfacies and electrolog curve associational characteristics of every subfacies have been described. In vertical,the evolution of sedimentary facies of Yi-ma Group is alluvial fan system.lake delta system,lake system from the bottom of the Group to the top.
关键词
煤田
地层
义马组
沉积
环境
测井
Logs association
Yi ma formation
Sedimentary environment
