Logging response characteristics and formation process of flushed zone in the Orinoco heavy oil belt, Venezuela

CHEN Heping,CHEN Hao,LI Changwen,WANG Yusheng,LI Jianping,HUANG Rui,TIAN Congcong,HOU Qiuyuan

Table 2 Properties of drilling fluid in some wells with positive anomaly of spontaneous potential.

Well Temp./°C Rm/(Ω·m) Rmf/(Ω·m) Pwe/(mg·L-1) 1E 26.7 1.36 1.13 5 000 2E 31.1 2.15 1.21 4 900 10PV 23.9 1.39 1.24 5 100 14PV 26.7 1.56 1.39 4 300 23PV 20.0 1.22 1.1 5 300