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利用研究区岩石薄片、铸体薄片、压汞和物性资料等,对定边地区长82所有探评井进行研究,从多角度分析影响长82储层的物性因素。研究表明:研究区长82储层主要由灰色、灰褐色极细-细粒长石质岩屑砂岩、岩屑质长石砂岩为主;填隙物以铁方解石为主;成岩作用类型较为多样,主要包括压实作用、胶结作用、溶解作用;储集空间以粒间孔和溶蚀孔为主,为微喉型、微细喉,为特低孔—超低渗储层。
Based on the data of rock slices, castings, mercury intrusion and physical properties in the study area, all the exploration wells in Changdeong 82 were studied, and the physical factors influencing Chang 82 reservoir were analyzed from multiple perspectives. The results show that the reservoirs in Chang-82 are mainly composed of gray and tawny ultrafine-fine feldspathic lithic sandstone and lithic feldspathic sandstone, and the interstitials are dominated by iron calcite. The types of diagenesis are quite diverse , Mainly including compaction, cementation and dissolution. The reservoir space mainly consists of intergranular pores and dissolved pores, which are micro-laryngeal and fine laryngeal, and are ultra-low porosity and ultra-low permeability reservoirs.