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研究的基礎上,通過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、粒度分析等多項測試手段,對坪北油田延長組長4 + 52長62儲層巖石學、成巖作用及次生孔隙進行了詳細研究。
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 館上段儲層巖性以巖屑質長石細砂巖為主,其次為中細砂巖和粉砂巖,巖石中石英含量低,而長石、巖屑含量高,膠結物以泥質為主,表現(xiàn)出低成分成熟度和低結構成熟度的特點。