根据陆相盆地高分辨率层序地层学原理 ,综合利用岩心、测井、地震资料 ,对鄂尔多斯盆地大牛地气田山一段地层层序进行了识别和划分 ,并对层序地层的特征和演化进行了分析。研究结果表明 ,山一段地层属于河流―三角洲沉积体系 ,其中辫状河三角洲平原较为发育。在这种沉积背景下 ,可以识别出 2种超短期旋回类型和 4个短期旋回层序。对这些旋回特征进行了描述 ,建立了该区的等时地层格架 ,以此为基础 ,将大牛地气藏山一段地层划分为 4个小层。

Though the comprehensive analysis of rock cores, well logs and seismic data, and under the guidance of the theory of high|resolution sequences stratigraphy, the stratigraphic sequence of Shan 1 section in the Da Niudi gas field has been identified and analyzed. The results show that the Shan 1 formation belongs to the river-delta sedimentary system, of which braid river delta developed better. In this sedimentary circumstance, three types of sumper-short-term cycle sequences can be distinguished,  and four short-term cycle sequences can be indentified. And further, the chronostratigraphic sequence framework has been constructed, which has great application significance in the fine gas description.