七里村油田Y49井区长6储层特征研究

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。

Characteristics of Chang6 Reservoir in Y49 Region,Qilicun Oilfield

Y47 region locates in the east of Ordos basin. The reservoir is low pore and extra-low permeability. In this paper, Chang6 reservoir in Y47 region was studied by core observation, physical property analysis, casting thin section, X-ray diffraction. The results show that lithology of Chang6 is fine-medium gained arkose, and more silt-finestone and siltstone; pore types consist of opening-intercrystal pores, solution opening-intergranular pores, fracture aperture and so on, and solution opening-intergranular pores is main type; the main pore-throat type is macropore -fine throat and micropore -fine throat; the pore structure formation was resulted from the diagenesis.