The Research Of Fine Description Of Ordovician Carbonate Fracture-vuggy Reservoir Of Hade Area

The Ordovician carbonate reservoir of Hade area is mainly para-laminar distributed in Yijianfang and Yingshan formation,whose heterogeneity is extremely strong,showing the characteristic of overlayered vertically and gathering alongside unconformity surface.Combined with previous study results of sequence stratigraphic classification,this paper uses INPEFA high-frequency sequence stratigraphy division technology to divide Ordovician carbonate rock strata of Hade area into 4 sedimentary cycle:O2y1-O2y4.Then taking the HD27 well for example,this paper use GR data as INPEFA segment curve to distinguish the interface of Yijianfang and Yingshan formation.Based on the analyse of cores and sheet,seismic and logging response characteristics,this paper finished the fine fractured-vuggy reservoir description and think that the fractured-vuggy reservoir is overlayered vertically and gathering alongside faults and fructure in the top surface of Yijianfang foramtion below ahout 100 meters,as well as top Yingshang formation.At last,sedimentary cycles and lithology,fault zone and multi period karst are summarized as the main controling factors of fractured-vuggy reservoir.