准噶尔盆地陆东-五彩湾地区石炭系火山岩储集性能及影响因素

准噶尔盆地陆东-五彩湾地区石炭系火山岩油气藏勘探近年来取得了重要进展.该区火山岩主要由中-基性火山熔岩和中-酸性火山碎屑岩组成.火山岩的储集空间可以分为原生孔隙和次生孔隙两类.火山岩储集性能主要受岩性与岩相、风化和次生溶蚀作用、构造作用和形成环境等多种因素的共同影响.最有利的储集岩为火山角砾岩和流纹岩，其次为安山岩，而最有利的储集部位为石炭系顶面较厚的风化壳.此外，研究区火山岩岩石类型、火山岩的储集性能及储集空间组合类型等都具有区域性的差异.其中，陆东地区火山岩的储集性能最理想，五彩湾地区火山岩的储集性能略差，三个泉地区火山岩的储集性能最差.

Reservoir properties and controlling factors of Carboniferous volcanic rocks in Ludong-Wucaiwan area of the Junggar Basin

The study on volcanic pools and their oil-gas exploration of the Carboniferous volcanic rocks in Ludong-Wucaiwan area of the Junggar Basin made an important progress recently.The volcanic rocks were mainly composed of intermediate-basic lavas and intermediate-acidic volcaniclastic rocks.The reservoir space of volcanic rocks could be divided into primary pores and secondary pores,and the reservoir properties were mainly affected by lithology and lithofacies,weathering and secondary solution,tectonism.environment of formation.The most favorable reservoir rocks in the studied area were volcaniclastic rocks and rhyolites, and the secondary favorable one was andesites,and the most favorable reservoir position was weatherd crust at the top of the Carboniferous.There were regional variations in types of volcanic rocks, reservoir properties of volcanic rocks as well as rock association types of reservoir space.The volcanic rocks in Ludong area were the most favorable reservoirs,the volcanic rocks in Wucaiwan area were relatively good ones,and the reservoir properties might be poor of the rocks in Sangequan area.