College;
of;
Geo-Resources;
and;
Information,;
China;
University;
of;
Petroleum,;
Dongying,;
Shandong;
257061,;
China.;
College;
of;
Physics;
Science;
and;
Technology;
China;
University;
of;
Petroleum.;
Dongying;
257061,;
China.;