松辽盆地南部长岭断陷火山岩储层的特征与勘探潜力

长岭断陷深层火山岩大量发育，储集空间类型丰富，有利储层发育。将火山岩储层的形成分为2个主要阶段，即初始成岩阶段和成岩后生阶段。初始成岩阶段形成原生孔隙，成岩后生阶段形成次生孔隙。火山岩在初始成岩阶段和成岩后生阶段都可以形成大量的各种规格的裂缝，不同阶段的裂缝具有不同的形成机制和不同的特点，这些裂缝是火山岩地层能作为储层的关键所在。火山机构横向并列叠置，火山岩厚度大，呈多旋回发育的特征，是深层主要的储层。盆地深层广泛发育的厚层火山岩储层与烃源岩、深大断裂配置，形成有利的勘探目标，勘探潜力巨大。

Volcanic reservoir features and exploration potential of Changling faulted depression in the southern Songliao Basin, China

Volcanic reservoirs are well developed in deep area of Changling faulted depression. The formation of volcanic rock reservoirs was divided into two stages, the initial diagenesis stage and later diagenesis stage. The initial diagenesis formed primary porosity; The later diagenesis formed secondary porosity; Tectonism was throughout the whole process of the diagenesis, forming various primary and secondary cracks. Those cracks are key that the volcanic formates becomes reservoir. Volcanic edifice stacked horizontally side by side. Volcanics which have big thinkness and multi-cycle development characteristics are the main reservoir of deep area. Widely developed thick layer of volcanic reservoir in the deep basin, combined with source rocks, and big-deep faults, formed favorable exploration targets, which have huge exploration potential.