新立地区嫩三段储层微观特征研究

Research on Reservoir Microscopic Characteristics of 3rd Member of Nenjiang Formation in Xinli Area

以沉积学、石油地质学为理论指导,结合地震、钻井、岩心样品的测试分析等相关资料,对上白垩统嫩江组三段储层的黑帝庙油层岩石学特征、成岩作用、微观孔隙结构类型及物性特征等进行了研究,按孔隙结构将储层分为4类,并论述了不同类型孔隙结构的特点。嫩三段储层毛细管压力曲线形态具有单平台型和双阶梯形的孔隙结构特征,排驱压力低,中值压力也较低。最大孔喉半径和中值孔喉半径都较大,最小非饱和孔喉体积分数较小,退汞率高。

Based on the theory of sedimentology and petroleum geology and in combination with seismic,well logging,core sampling and some relative data and as well as the study achievements of other researchers,the reservoir petrologic characteristics,diagenesis,microscopic pore structure types and physical property were studied in the 3rd member of Nenjiang Formation of Heidimiao Reservoir.Accorded to the pore structure,the reservoirs in the area were divided into four types,and then the features of different types of pore structures were denoted.And finally it is pointed out that the curve shape of capillary pressure of the 3rd member of Nenjiang Formation has the pore structural characteristics of single platform and dual steps,where displacement pressure is low,median pressure is lower with max pore radius and bigger median pore throat radius and the smaller non-saturated throat radius percentage,therefore the mercury withdrawal rate is high.