三塘湖盆地马朗凹陷石炭系火山岩储层成岩作用研究——成岩作用对储集空间演化的影响

Diagenesis Research of Malang Depression Carboniferous Volcanic Rock Reservoirs in Santanghu Basin: Influence of Diagenesis on Reservoir Space Evolution

通过岩心描述、岩石薄片鉴定、孔隙特征分析,认为本区石炭系火山岩以中基性岩浆岩为主。主要岩石类型为熔岩及火山碎屑岩;储集空间为原生孔隙、次生孔隙和复合孔隙,原生缝、次生缝和复合缝。储集空间在不同成岩阶段所受影响不同,其中溶解作用对储集空间的演化影响最为显著。

Through the description of rock core,identification of rock chip,analysis of characteristics of the pore,the paper thinks that the mafic igneous rocks are the core of the carboniferous volcanic rocks,the lava and pyroclastic rocks are the main rock types,and the reservoir space belongs to primary pores,secondary porosity and composite porosity,primary seam,secondary seam and composite seam.In the different diagenetic stage,the reservoir space will be affected by different factors,and the influence of dissolution to the evolution of reservoir space is the most outstanding.