Reservoir characteristics of Chang 4+5 oil reservoir set in Hujianshan area, Ordos Basin
Online published: 2014-04-06
Based on the analysis of cores, logging, thin sections, scanning electronic microscope, physical properties and mercury injection, this paper discussed the characteristics of sedimentary facies, petrologic features, pore types, physical properties, diagenesis and effects on reservoir. The result shows that the Chang 4+5 oil reservoir set in Hujianshan area is mainly made up of debris-feldspar sandstone and feldspar sandstone, and the main pore types are primary intergranular pore and feldspar dissolved pores. The porosity of the reservoir is 10.86%, and the permeability is 0.56 mD. The reservoir belongs to low porosity, ultra-low permeability reservoir and tight reservoir. The diageneses contain compaction, cementation and dissolution, and the protection from chlorite membrane to primary intergranular pores and dissolution are very constructive to the reservoir. Reservoir of Chang 4+5 oil reservoir set in Hujianshan area can be divided into four types, and typeⅡand type Ⅲ are the main reservoirs.
GUO Huajun , CHEN Nenggui , X U Yang , ZOU Zhiwen , LI Chang , WANG Libao . Reservoir characteristics of Chang 4+5 oil reservoir set in Hujianshan area, Ordos Basin[J]. Lithologic Reservoirs, 2014 , 26(2) : 32 -37 . DOI: 10.3969/j.issn.1673-8926.2014.02.006
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