准噶尔盆地石西油田火山岩原生气孔分布序列及其成因

来源期刊:中南大学学报(自然科学版)2013年第1期

论文作者:张勇 查明 陈中红 丁靖

文章页码:251 - 256

关键词:火山岩;原生气孔分布序列;成因;石西油田;准噶尔盆地

Key words:volcanic; primary pore distribution sequence; cause; Shixi Oilfield; Junggar Basin

摘    要:通过岩心观察、镜下鉴定和统计分析,研究准噶尔盆地石西油田石炭系火山岩原生气孔分布序列特征,并进一步讨论其成因。结果表明:原生气孔主要发育在溢流相安山岩和玄武岩层中上部,且随深度增加而减少,形成明显的气孔分布序列。原生气孔密度(y)与深度(x)的定量关系为y=-78.98x+372 935,斜率绝对值反映熔岩旋回纵向上原生气孔密度的变化速率。进一步利用该公式计算出石西4井安山岩段顶面(4 708 m)理论原生气孔密度为1 097个/m,气孔发育的底界深度为4 721.9 m。该定量关系仅适用于一个火山熔岩旋回内部。鉴于该火山岩原生气孔分布受控于岩性岩相和火山喷发环境,进一步提出3种原生气孔分布序列理论模型,给出分析原生气孔分布序列的方法。

Abstract: The volcanic primary pore distribution sequence of Carboniferous in Shixi Oilfield of Junggar Basin was studied by making use of the observation of core samples, microscopic identification and statistical analysis, and its causes were discussed. The results show that the volcanic primary pores are mainly developed at middle and upper parts of the overflow andesite and basalt and decrease with the increase of depth to form an obvious pore distribution sequence. The quantitative relationship between primary pore density (y) and depth (x) is y=-78.98x+372 935. The absolute value of slope reflects the rate of change of primary pore density in the vertical direction of a lava cyclothem. The density of the primary pores of the top of the andesite of Shixi No.4 well is 1 097 pores per meter theoretically. The bottom depth of the primary pores is 4 721.9 m. The quantitative relationship is only suitable to the lava cyclothem. The volcanic primary pores are controlled by lithology, lithofacies and volcanic eruption environment. Three kinds of theoretical models of pore distribution sequence were presented which provide a new method to analyze the pore distribution sequences.

相关论文

  • 暂无!

相关知识点

  • 暂无!

有色金属在线官网  |   会议  |   在线投稿  |   购买纸书  |   科技图书馆

中南大学出版社 技术支持 版权声明   电话:0731-88830515 88830516   传真:0731-88710482   Email:administrator@cnnmol.com

互联网出版许可证:(署)网出证(京)字第342号   京ICP备17050991号-6      京公网安备11010802042557号