摘要
通过对准噶尔盆地腹部陆西地区石炭系火山岩的研究,提出了该区的火山岩岩相模式,即火山通道相、爆发相、喷溢相、侵出相、火山—沉积相等5个相。对156个实测孔隙度和104个实测渗透率数据分析后发现:不同岩相火山岩的物性不同,且以爆发相和喷溢相为好;不同岩性火山岩的物性也有较大的差别,并以熔渣状玄武岩、杏仁状安山岩、火山角砾岩为好;在合适的条件下,加上岩相与岩性的有利组合,可以形成良好的储层;不同岩性火山岩的孔隙度和渗透率与不同,与电性之间的线性相关性亦有较大的差别,但总体上来说相关性都不大。
This paper analyzes the Carboniferous volcanic rocks of the Luxi area in the hinterland of Junggar basin and establishes the model of volcanic rocks facies. The rocks are divided into five facies： volcanic channel facies, explosive facies, effusive facies, extrusive facies, volcanic-sedimentary facies. The test of 156 samples for the porosity and 104 samples for the permeability shows that different rock facies have different physical properties. The investigation reveals that the explosive and effusive facies are better than the other facies. This investigation also finds that different lithology have different physical properties and the slaggy basalt, the amygdaline basalt and the volcanic breccia have the best physical properties. In a favorable condition, the combination of the rock facies and the lithology may produce good reservoirs. In addition, the relation between porosity and logging is different among different volcanic rocks, yet it is not strong in general.
出处
《天然气地球科学》
EI
CAS
CSCD
2008年第2期198-203,共6页
Natural Gas Geoscience
基金
国家重点基础研究发展计划(“973”)项目(编号:2006CB202305)
中国科学院知识创新工程重要方向项目(编号:KZCX3-SW-147)资助
关键词
准噶尔盆地腹部
石炭系火山岩
储层物性
岩电关系
Hinterland of Junggar basin
Carboniferous volcanic rocks
Reservoir physical properties
Porosity-logging relation.
