火山岩储集层特征研究综述

近些年来,随着国内外在火山岩油气藏勘探开发方面的不断突破,火山岩这一特殊油气储层也受到了国内外学者的广泛关注。火山岩储集层的发育受岩浆性质、喷发活动等的影响,岩性、岩相类型多变,加之后期经历了多期的构造作用和成岩作用致使火山岩储集层的储集空间类型变得十分复杂。本文在综述火山岩储集层岩性、岩相研究现状和总结前人分类的基础上,将火山岩的储集空间总结为原生孔隙、次生孔隙和裂缝三个大类,以及原生气孔,残余气孔,砾间孔,晶间晶内孔,斑晶溶蚀孔,脱玻化孔,杏仁体溶蚀孔,基质溶蚀孔,角砾间溶孔,隐爆裂缝,冷凝收缩缝,构造裂缝,风化裂缝,溶蚀缝14个小类。并且讨论了火山岩储集空间与岩性及岩相的关系。

A Summary of Studies on Characteristics of Volcanic Rock Reservoirs

In recent years,with the continuous breakthrough in the exploration and development of volcanic reservoirs at home and abroad,volcanic rock,a special oil and gas reservoir,has also received extensive attention from scholars at home and abroad.The development of volcanic reservoirs is affected by magmatic properties,eruptionactivities,etc.The lithology and facies are variable in type,and the multi-period tectonics and diagenesis in the later period have caused the reservoirs space type of volcanic reservoirs to become very complex.Based on a review of the lithology of volcanic reservoirs,the current status of lithofacies research,and the classification of predecessors,the reservoir space of volcanic rocks is summarized into three major categories:primary pores,secondary pores and fractures,as well as the original gas pores and residual pores,inter-grain pores,intergranular crystal pores,porphyritic pores,devitrification pores,agarite dissolution pores,matrix dissolution pores,breccia dissolved pores,cryptographic cracks,condensation shrinkage joints,structural cracks,weathering cracks,There are 14 subtypes of dissolution joints.The relationship between volcanic rock reservoir space and lithology and lithofacies is also discussed.