Synchronous injection-production energy replenishment for a horizontal well in an ultra-low permeability sandstone reservoir: A case study of Changqing oilfield in Ordos Basin, NW China

WANG Jing,LIU Jungang,LI Zhaoguo,LI Hongchang,ZHANG Jiaosheng,LI Wenqing,ZHANG Yuanli,PING Yi,YANG Huanying,WANG Ping

Table 3 Statistics on daily oil production of individual sections of horizontal wells in some ultra-low permeability sandstone reservoirs of Changqing oilfield.

Block Produc- tion layer Number of production wells Average single section oil production/t Fracturing mode Z211 Chang 6 Member 70 0.50 Mixed water fracturing with large displacement Y284 Chang 6 Member 40 0.52 Multi-cluster staged fracturing M30 Chang 8 Member 80 0.55 Multi-cluster staged fracturing