The studied area is characteristic of the large denseness of well net and the small distance between wells . and there are many wells whose cores have been taken more 97 % . which offers good qualifications for analyzing of the three - dimensional structural and evolution of deposital system 研究区具有井网密度大、井距小的特点，且有多口取心收获率在97以上的连续取心井，这些有利的条件为沉积体系的三维构成特征及演化分析提供了有力的保障。
