Research;
Center;
of;
Petroleum;
Geology;
in;
Research;
Institute;
of;
Petroleum;
Exploration;
and;
Development,;
PetroChina,;
Beijing;
100083,;
China;
Department;
of;
Earth;
Sciences,;
Nanjing;
University,;
Nanjing;
210093,;
China;
Research;
Institute;
of;
Petroleum;
Exploration;
and;
Development,;
Sinopec,;
Beijing;
100083,;
China;