Study on the Physical Property Control Factors of Chang 61 Tight Storage Sandstone in Zhuanyaowan Area,Ordos
[Purposes]Physical characteristics will greatly affect the oil and gas distribution and produc-tion capacity of tight storage sandstone.In order to ensure the increase and stable oil and gas production of Chang 61 tight storage sandstone in Zhuanyaowan area of Ordos Basin,it is of great significance to clarify the control factors of its material characteristics.[Methods]This paper uses microscopic analysis,porosity,permeability and high pressure mercury to analyze and study the petrographic characteristics,pore types,pore structure characteristics and physical reservoir characteristics of Chang 61 tight storage sandstone,and discusses the main controlling factors of tight reservoir sandstone physical characteris-tics.[Findings]The results show that the Chang 61 tight storage sandstone in study area developed more fine-granular high feldspar content sandstone,pore-film cementation and line contact development,more residual intergranular pores and feldspar pores.[Conclusions]The sedimentary facies and diagen-esis facies affect the distribution of physical properties of tight storage sandstone.The underwater diver-sion channel block sand and chlorite film cementation-intergranular pordspar sandstone have high physi-cal characteristics,and are the dominant parts of oil and gas accumulation.
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