The Chang 2 Reservoir Characteristic of Zhiluo Oil field in Ordos Basin

Delta sediments are the main deposits in the Chang 2 oil beds of Yanchang Formation in Zhiluo area of the Ordos Basin and the sand bodies of distributary channel and subaquatic distributary channels are main reservoirs for the hydrocarbon.Fine lithic arkose sandstone and fine arkose sandstone are main sandstones of the Chang 2 reservoir.Dissolution porosity is less developed,the main reservoir in the grounds of dissolution of intergranular pore space,the original intergranular pores and micro-porous composite hole to hole remnants mainly intergranular corrosion,a small amount of micro-pores.Mainly in low porosity reservoirs,low permeability reservoir.Strong heterogeneity.Study area,strong compaction,cementation is the formation of low porosity and permeability of the main factors,while dissolution is the reservoir of the main factors to improve.