Abstract
Using core, mud logging and logging data, the study on the sedimentary characteristics of the Yan 6 oil layer of the Yan'an Formation in the X area of the Ordos Basin was carried out. It is believed that the Yan 6 oil layer in X area mainly develops delta deposits, and the subfacies is delta plain. The sedimentary microfacies are mainly diversion channels, inter-branch swamps and natural dikes. According to coring well data, sand body shape analysis, and logging facies analysis. Vertically, the sand bodies in the Yan 6 oil layer group are discontinuous, and there are mainly distributary channels and inter-branch swamps. Horizontally, the Yan 6 oil layer group develops 7 river channels, which are distributed in a strip on the plane, and the extension direction is northwest-south east. The comprehensive characterization of the sedimentary microfacies and the distribution of reservoir sand bodies in Yan 6 oil layer provides a reliable basis for the oil field to adjust the oil production plan in time.
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