With high magnification of microscopy,a lot of petroleum inclusions were found,which occur in the fissures of sand grains and authigenic minerals in the source rock.

This paper provides an overview on some aspects of the petroleum-inclusion research and application,including fluid-inclusion petrography,microthermometry,petroleum inclusion abundance,and the collection and preparation of samples.

A lot of petroleum inclusions are observed in the intrusive diabases in Well Shang-52 in Shanghe region, Linyi sag.

The authors analyzed the chacteristics and their composition of zircon inclusions in corundum megacrysts related to alkli basalt,inquired into the cause of formation of the zircon inclusions,and infered that the formation of the corundum megacrysts is related to crust mantle geological action.