Information;
Engineering;
School,;
Chengdu;
Institute;
of;
Technology,;
Chengdu,;
Sichuan;
Province,;
610058,;
China;
Post;
Doc;
Station.;
BC-P;
Inc.;
of;
CNPC,;
Zhuozhou,;
Hebei;
Province,;
072751,;
China;
Geophysical;
Technilogy;
Research;
Centre,;
BGP;
Inc.;
of;
CNPC,;
Zhuozhou,;
Hebei;
Province,;
072751,;
China;