摘要
海拉尔盆地侏罗－白垩系砂岩储集岩属成份成熟度和结构成熟度均较低的长石岩屑砂岩和岩屑砂岩类。砂岩中发育两类孔隙空间，主要与压实作用和溶蚀作用有关。本文提出菱铁矿的褐铁矿化、古土壤标志、自生高岭石的产出和碳酸盐胶结物的稳定同位素特征等淡水渗入溶蚀作用的证据。此类溶蚀作用形成的次生孔隙发育段储集空间以原生粒间孔和粒间溶蚀扩大孔为主。从而提出必须注意寻找与沉积间断有关的储层发育段。煤的核磁共振碳谱和红外吸收光谱分析结果与次生孔隙发育深度的匹配关系证明，有机质成熟过程中有机酸的析出是造成铝硅酸盐碎屑颗粒溶蚀的主要原因，并探讨了控制溶蚀作用的因素。
The Jurassic-Cretaceous sandstone reservoirs consist mineralogieally of feldspathic litharenite and lithic sandstone with low compositional and textural maturity.Two types of porosity related to compaction and dissolution are found.Ferritization of siderite,paleosoil mark、authigenetic kaolinite and stable isotopic characters of carbonates are indicated as the evidences of meteoric water penetration.The reservoir com- partment with secondary pores resulted from meteoric dissolution Possesses mainly intergranular dissolu- tion enhanced pores and original intergranular pores.That type of reservoir intervals closely related to sed- imentary hiatus has to be emphasized.^(13)C NMR and infrared absorption spectra well matching the depth of secondary pores shows that organic acids contributed by the maturation of kerogen is majorly responsible for the dissolution of aluminosilicate grain.The control factors are proposed in this paper.
出处
《中国海上油气（地质）》
CAS
1992年第6期9-16,共8页
China Offshore Oil and Gas(Geology)
