Th is study was supported by the National Natural Science Foundation of China(NSFC,no.40172056);the Research Fund for the Doctoral Program of Higher Education,China(RFDP,no.2000042506).
With a production of 208.2 m3/d, heavy oil was produced by drill stem test (DST) from three shallow reservoirs in Sand Group Nos. Ⅰ and Ⅲ of the Neogene Guantao Formation (NgⅠ and NgⅢ) and the Eogene Dongying Form...