准噶尔盆地西北缘五八开发区二叠系佳木河组火山岩储层特征  

Characteristics of Volcanic Reservoirs in Jiamuhe Formation of Permian in the 5^(th) and 8^(th) Districts,Northwestern Margin of Junggar Basin

作　　者：匡立春[1] 吕焕通[1] 薛晶晶[2] 朱筱敏[2] 李德江[2] 

机构地区：[1]中国石油新疆油田分公司,新疆克拉玛依834000 [2]油气资源与探测国家重点实验室(中国石油大学(北京))

出　　处：《高校地质学报》2008年第2期164-171,共8页Geological Journal of China Universities

摘　　要：基于岩心、薄片及成像测井(FMI)等资料,对准噶尔盆地西北缘五八开发区火山岩储层特征分析表明,该储层主要分布于二叠系佳木河组(P1j),包括熔岩和火山碎屑岩。熔岩的平均孔隙度和渗透率分别为6.94%和6.68×10-3μm2;火山碎屑岩的平均孔隙度和渗透率分别为10.01%和7.93×10-3μm2。火山岩经历早期的冷却固结和脱玻化阶段以及后期的构造破裂作用、溶蚀溶解作用和充填交代等作用,使得储集空间主要以次生孔隙为主,并伴随有裂缝发育。安山岩、凝灰岩和火山角砾岩的岩性差异,以及溶蚀和不整合面等成岩、构造作用是影响火山岩储层质量的主要因素。A detailed analysis of volcanic rocks reservoirs in the 5^th and 8^th districts of the northwestern Junngar Basin was done in this paper. The volcanic rocks comprise lava and volcanoclastics and are mainly distributed in the Jiamuhe Formation of the Permian. Based on the study on the well cores, rock thin sections and FMI it is shown that the average porosity and permeability of lava is 6.94% and 6.68 × 10^-3μm2, respectively, and those of the volcanoclastics are 10.01% and 7.93 ×10%-3 μm2, respectively. The diagenesis of volcanic rocks includes cooling consolidation and devitrification at the earlier stage, and structural fracturing, dissolution and filling replacement at the later stage, which formed the secondary pores and fractures. The main influencing factors of reservoir quality include lithology, diagenesis and tectonics.

关 键 词：准噶尔盆地西北缘 火山岩储层 次生孔隙 成岩作用 影响因素 

分 类 号：P618.130[天文地球—矿床学]