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七里村油田Y49井区位于鄂尔多斯盆地东部,为典型的低孔-低渗储层。通过岩心观察、物性分析、薄片鉴定、X-衍射等技术手段,对七里村油田Y49井区长6储层样品进行了测试分析。研究表明,Y49井区储层岩性以灰色细粒长石砂岩为主,其余为粉细砂岩及粉砂岩,砂岩储层的孔隙类型有粒间孔隙、溶孔、以及裂隙孔等多种孔隙类型,以粒间溶孔最为发育,孔喉类型主要有大孔—细喉型和小孔—细喉型,这些孔隙结构的形成主要受成岩作用的控制。
The Y49 well in Qilimura Oilfield is located in the eastern part of Ordos Basin and is a typical low-porosity and low-permeability reservoir. Through the observation of cores, physical property analysis, thin slice identification and X-ray diffraction, the samples of Chang 6 reservoir in Y49 well of Qiliuli Oilfield were tested and analyzed. The results show that the lithology of Y49 well is mainly composed of fine grained feldspar sandstone and the rest are fine siltstone and siltstone. The types of sandstone reservoirs include intergranular pores, dissolved pores and fissure pores Type, with the most developed among the intergranular dissolved pores, pore throat types are mainly macropores - thin throat type and small hole - thin throat type, the formation of these pore structures are mainly controlled by diagenesis.