On the basis of the study of high resolution sequence stratigraphy , this paper discusses the reservoir petrology ' s diagenesis and secondary pore of the chang 4 + 52 ~ chang 62 pay zones in detail by using the methods of analysis of mercury injection , cast section , popular section , scanning electron microscope , x - ray diffraction and etc . the reservoir rock is mainly composed of feldspar fine sandstone , which is characterized by low compositional maturity and relatively high textural mature 本文在高分辨率層序地層學(xué)研究的基礎(chǔ)上,通過(guò)15口井的常規(guī)物性、壓汞、鑄體分析、薄片鑒定、掃描電鏡、 x光衍射、陰極發(fā)光、粒度分析等多項(xiàng)測(cè)試手段,對(duì)坪北油田延長(zhǎng)組長(zhǎng)4 + 52長(zhǎng)62儲(chǔ)層巖石學(xué)、成巖作用及次生孔隙進(jìn)行了詳細(xì)研究。
According to rock and mineral analysis , the formation consists dominantly of detrital feldspathic fine - sandstone with medium and silt sandstone secondly . lithologically , the content quartz is lower than those of feldspar and detritus , and the cement is dominated by clay , which gives the feature of low compositional maturity and low textural maturity 館上段儲(chǔ)層巖性以巖屑質(zhì)長(zhǎng)石細(xì)砂巖為主,其次為中細(xì)砂巖和粉砂巖,巖石中石英含量低,而長(zhǎng)石、巖屑含量高,膠結(jié)物以泥質(zhì)為主,表現(xiàn)出低成分成熟度和低結(jié)構(gòu)成熟度的特點(diǎn)。