三塘湖盆地马朗凹陷二叠系碳酸盐岩储层特征

为正确认识碳酸盐岩储层，寻找有利储集区，对马朗凹陷二叠系碳酸盐岩的储层特征进行了研究和论述。研究认为，该区碳酸盐岩可划分为石灰岩和白云岩两大类。石灰岩可划分为颗粒灰岩和晶粒灰岩两类；白云岩可划分为碎屑白云岩和混晶白云岩和泥晶白云岩两类。储层具低孔、低渗特性；孔隙类型以原生孔隙和溶蚀孔隙为主，其中以晶间溶孔为主要储集空间，以石灰岩中的颗粒灰岩含油性最好。

Features of permian carbonate formation in Malang sag

To understand and find favorable carbonate reservoir, characteristics of Permian carbonate reservoir in Malang sag have been reviewed which shows that they fall into two kinds: limestone and dolomite. The former can be divided into granular and crystal grain limestone, while the latter includes clastic and shaly crystal dolomite. The studied reservoir features low porosity (original and corrosion pores dominate) and low permeability (inter-crystalline pore as the main accumulating space). Of all these, grain limestone is the best oil bearing one.