The reservoir in middle and upper part of qiketai formation is mainly composed of lithic sandstone , which is the first lithologic section 七克臺組中上部儲集層以巖屑砂巖為主,屬于第一巖性段。
The petrographic and xrd analysis reveals that the reservoir of the upper part of kongdian formation mainly consists of feldspathic and minor amount of lithic sandstone . the feldspar is consisting mainly of na 巖石學與xrd全巖分析表明,孔店組上段砂巖主要為長石砂巖,此外還發(fā)育少量巖屑砂巖。
百科解釋
Lithic sandstones, or lithic arenites, or litharenites, are sandstones with a significant (>5%) component of lithic fragments, though quartz and feldspar are usually present as well, along with some clayey matrix. Lithic sandstones can have a speckled (salt and pepper) or gray color, and are usually associated with one specific type of lithic fragment (i.