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应用流体包裹体均一温度、镜质组反射率、孢粉颜色指数、色谱-质谱、热解分析、有机酸测定、X射线衍射、镜下鉴定、扫描电镜、电子探针、铸体薄片鉴定等资料,研究了松辽盆地北部中浅层的成岩作用和孔隙演化。结果表明,该盆地中浅层碎屑岩成岩作用可划分为早成岩A期、早成岩B期、中成岩A1亚期、中成岩A2亚期和中成岩B期两个阶段五个(亚)期;只有泉三、四段底部地层进入中成岩B期,整个中浅层的成岩作用并不太强;成岩作用具有从西到东逐渐增强的趋势。中浅层的储层以原生孔隙为主,随埋深增大和成岩作用增强,次生孔隙所占的比例增加,中成岩阶段A期可占总孔隙的24.8%。
The homogenization temperature of fluid inclusions, vitrinite reflectance, sporopollen color index, chromatographic-mass spectrometry, pyrolysis analysis, organic acid determination, X-ray diffraction, microscopic identification, scanning electron microscopy, electron probe, Diagenesis and pore evolution in the middle and shallow layers of northern Songliao Basin were studied. The results show that the diagenesis of middle-shallow clastic rocks in this basin can be divided into five stages (sub-stage): early diagenetic stage A, early diagenetic stage B, meta-diagenetic stage A1, middle stage diagenetic stage A2 and intermediate stage diagenetic stage B, Period. Only the bottom strata of Quaternary and Quaternary have entered the diagenetic stage B, and the diagenesis of the whole middle and shallow layers is not too strong. Diagenesis tends to increase gradually from west to east. The middle and shallow reservoirs are dominated by primary pores. With the increase of burial depth and diagenesis, the proportion of secondary pores increases, and the middle diagenesis phase A can account for 24.8% of the total porosity.