江汉盐湖盆地盐间非砂岩储层特征及储层类型

Characteristics and Types of Inter-salt Non-sandstone Reservoir in Jianghan Salt-lake Basin

江汉盐湖盆地盐间储层的岩性以泥质碳酸盐岩为主 ,碳酸盐质泥岩、混合岩次之 ,夹部分泥质钙芒硝岩 ,属碳酸盐泥质物钙芒硝三者的混合岩类。储层孔隙结构复杂 ,束缚水饱和度高 ,有效采收率较低 ,在层理缝和构造裂缝均不发育的情况下难以形成有经济效益的工业产能。成像测井、常规测井与岩心观测资料对比证实 ,盐间储集层可分为单一裂缝型、断裂破碎型、孔隙裂缝双渗流型、层理发育孔隙型和层理不发育孔隙型等 5种。

The lithology of inter salt reservoir mainly consists of argillaceous carbonate,carbonate bearing mudstone and a mixture of both rocks is at second place, intercalated with argillaceous glauberite,which belongs to the mixture of carbonate,mudstone and glauberite Pore structure is complicated,irreducible water saturation is high and effective recovery is lower in the reservoir Under conditions of poor bedding parting and structural fractures, commercial productivity with economic benefit is hard to be created Analyses of imaging,conventional well logging and core data show that the inter salt reservoir would be divided into 5 types, such as fractural, broken crushed,porous fractural and dual percolating,pores with grown and poor bedding parting The types of inter salt reservoirs could be recognized and classified by using the imaging and conventional logging data