Key;
Laboratory;
of;
Gas;
Geochemistry,;
Lanzhou;
Institute;
of;
Geology,;
Chinese;
Academy;
of;
Sciences,;
Lanzhou;
730000,;
China;
Research;
Institute;
of;
petroleum;
Exploration;
and;
Development,;
Sinopec,;
Beijing;
100083,;
China;
Key;
Laboratory;
of;
Gas;
Geochemistry,;
Lanzhou;
Institute;
of;
Geology,;
Chinese;
Academy;
of;
Sciences,;
Lanzhou;
730000,;
China;
Research;
Institute;
of;
petroleum;
Exploration;
and;
Development,;
Sinopec,;
Beijing;
100083,;
China;
Key;
Laboratory;
of;
Gas;
Geochemistry,;
Lanzhou;
Institute;
of;
Geology,;
Chinese;
Academy;
of;
Sciences,;
Lanzhou;
730000,;
China;
Key;
Laboratory;
of;
Gas;
Geochemistry,;
Lanzhou;
Institute;
of;
Geology,;
Chinese;
Academy;
of;
Sciences,;
Lanzhou;
730000,;
China;
University;
of;
Petroleum;
(Beijing),;
Beijing;
102249,;
China;
effective; hydrocarbon-source; rock,; sedimentary; environment,; trace; element,; stable; isotope,; identification; index.;