胡尖山地区长2沉积相研究

The Study Of Chang 2 sedimentary facies in Hu Jianshan Area

胡尖山地区位于鄂尔多斯盆地陕北斜坡中北部。其三叠统延长组是一套河流和湖泊为主的碎屑沉积。本次研究区长2沉积相研究从工区大量的取芯井岩芯观察与描述入手,以取芯井为基础,对取芯井段进行精细的微相判识和标定,结合测井资料,确定它的沉积亚相为三角洲平原亚相。划分为水上分流河道,分流间洼地、分流河道间沼泽、分流间湾、堤泛等微相类型。沉积相分析是研究砂体分布的关键技术,沉积相确定的正确与否直接影响着对砂体分布规律的认识。

The Hu Jianshan area is located Mid-north. in North Shanxi Pitch Erdos Basin IT is a set of rivers and the lake primarily clastic deposit, of yanchang formation, upper triassic This time studies Chang 2 sedimentary facies research massive to take the core well core observation and the description from the work area, take the core well as the foundation, to take the core section to carry on fine microfacies judge and demarcates, the union log information, determines its deposition subfacies for the delta plain subfacies. Divides for the aquatic distributary channel, the divergence between the marsh land, the distributary channel the bog, the divergence the bay, the dike exudes and so on the micro type. The sedimentary facies analysis is the key to study the sand body distributes, the sedimentary facies determines correctly or not is affecting directly to the understanding in sand distribution rule.