Study on micro-pore structure characteristics of Chang 8 reservoir in Yingwang Oilfield, Ordos Basin
Online published: 2013-06-01
Chang 8 reservoir in Yingwang Oilfield is characterized by strong heterogeneity, complex micro-pore structure and low yield. Based on scanning electronic microscope, casting thin slice, high pressure mercury penetration and oil/water displacement experiment, this paper studied the petrology characteristics, physical properties, micro-pore structure and its effect on flowing ability and oil displacement efficiency of Chang 8 reservoir in Yingwang Oilfield. The result shows that the pore structure can be divided into three types, including residual intergranular pore-dissolved pore, dissolved pore-residual intergranular pore and micropore-dissolved pore. We should focus on the dissolved pore-residual intergranular pore which is the best reservoir in the study area. The type and relative content of fillings, the core porosity and pore throat radius are the main factors influencing the flowing ability for low permeability reservoirs.
WANG Jianfeng . Study on micro-pore structure characteristics of Chang 8 reservoir in Yingwang Oilfield, Ordos Basin[J]. Lithologic Reservoirs, 2013 , 25(3) : 71 -76 . DOI: 10.3969/j.issn.1673-8926.2013.03.012
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