Origin, hydrocarbon accumulation and oil-gas enrichment of fault-karst carbonate reservoirs: A case study of Ordovician carbonate reservoirs in South Tahe area of Halahatang oilfield, Tarim Basin

DING Zhiwen,WANG Rujun,CHEN Fangfang,YANG Jianping,ZHU Zhongqian,YANG Zhimin,SUN Xiaohui,XIAN Bo,LI Erpeng,SHI Tao,ZUO Chao,LI Yang

Table 2 Statistics on development effect of different-level faults in Yueman block of the South-Tahe area.

Fault level Number of wells drilled Produced wells Success rate/% Average productivity/ (t?d-1) Main deep-large faults 31 30 96.8 50 Secondary faults 5 4 80.0 20 Main branched faults 4 2 50.0 30 Secondary internal faults 2 0 0 0