On the basis of sand dividing and isochronous tracing correlation which is making in supershort - term cycle sequence , choose two layers of 11 and 35 as units to make isopach map of sand and isochronous depositional microfacies map in short time and big scale . comparison with the same work which was made by predecessor , the precision and degree of reliability of these maps is outstanding 在相当超短期旋回层序级别的砂层划分和等时对比基础上，选择1 ~ 1和3 ~ 5两砂层为编图单元编制大比例尺短时间尺度的砂体等厚图和等时沉积微相图，并与前人所编的同类图件进行比较，突出了本文所编图件的精度及可靠程度。
