四川盆地HBC地区飞仙关组三段储层特征研究

Reservoir Characteristics of the Third Member of Feixiangnan Formation in HBC Area of Sichuan Basin

以四川盆地HBC地区飞仙关组三段储层为研究对象,在实测剖面和详细观察岩心的基础上,从储层岩石学特征、储集空间类型、孔隙结构特征及储集物性特征等方面对储层进行了研究。飞仙关组三段储集岩主要为鲕粒灰岩,主要形成于台内鲕粒滩沉积体系中,储集空间主要为铸模孔、粒内溶孔和晶间溶孔,孔隙度主要分布在2%～5%,渗透率主要分布小于0.02×10^(-3)μm^2,储层类型主要为裂缝-孔隙型。四川盆地HBC地区飞仙关组三段储层以Ⅱ、Ⅲ类储层为主。

This paper studies the reservoir of the third member of Feixianguan Formation in HBC Area of Sichuan Basin. Based on the observation of cores and measured profiles and from the reservoir petrology characteristics,type of reservoir space,pore structure and petrophysical properties,it points out that the reservoir rocks mainly consist of oolitic limestone,which is deposited in the depositional system of oolitic bank in open platform.The reservoir pore space is mainly made up of molds hole,inner grains solution pores and intercrystal solution pores.The porosity is mainly in the range of 2%to 5%and the permeability is lower than 0.02×10^(-3)μm^2.The reservoir type is mainly crack- pore.The reservoir is mainly TypeⅢandⅡin the third member of Feixianguan Formation.