Lithologic oil reservoir of the conglomerate fan-body developed in deep sag stage is the important target of oil-gas exploration in the mid-later term exploration in petroliferous basin, and it's oil-bearing potential is mainly dependent on the hydrocarbon expelling intensity of effective source rocks, the reservoir condition of gravel-sand fan-body and the result of their inter-action.

We have used the method of the hydrocarbon generation rate of organic carbon to separately calculate the hydrocarbon-generating intensity of coals and dark mudstones.

The 17 models of original and secondary hydrocarbon generation and expulsion from marine source rocks have been established.

In order to study the different hydrocarbon generating process of dispersed organic matters ( common source rocks) and organic - rich sediments ( high - quality source rocks) , hydrocarbon generation and expulsion experiments were made by source rock cores of lower and middle Es3 from Dongying Sag directly.

Using new technologies such as the thermo-pressure simulation experiment and hydrocarbon geochemistry, the hydrocarbon generation and expulsion models for various source rocks in coal-bearing environments were studied in detail on the bases of the systematic analysis and summarization of a number of geochemical and geological data.

Relation between the main accumulation stage and the process of generation and expulsion of hydrocarbon in T_3 x~3-T_3 x~4 petroleum system of Upper Triassic in the west Sichuan depression,China;