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鄂尔多斯盆地长63与长73储层发育,岩石以长石岩屑砂岩为主,其次为岩屑长石砂岩,以低孔低渗储层为主。现今孔隙发育特征呈现出分段式,发育次生孔隙。此外,从长63与长73孔隙演化的结果表明,长63与长73储层呈现出四个阶段的演化特征,分别为机械岩石胶结、溶蚀、减孔及剥蚀抬升后的增孔方式,与构造演化的特征具有匹配关系。
Chang 63 and Chang 73 reservoirs in the Ordos Basin are well developed. The feldspar is dominated by feldspathic lithic sandstones, followed by lithic feldspar sandstones and mainly low porosity and low permeability reservoirs. Nowadays, the characteristics of pore development present a segmental pattern and develop secondary pores. In addition, the results from the evolution of Chang 63 and Chang 73 pores show that the Chang 63 and Chang 73 reservoirs show four stages of evolution characteristics, namely mechanical rock cementation, erosion, pore reduction and denudation uplift, respectively The characteristics of tectonic evolution have a matching relationship.