Study of the evolutionary history of source rocks and oil-source correlation in Lishu fault depression in the southeastern uplifted area sho.

Dehui fault depression has been explored for more than forty years,while less breakthrough has been made since 1990s,so it is significantly to deep understand the geochemical character and origin of deep natural gas to the next exploration.

Five kinds of fault activity model are summedup by recovering the tectonic developing history of Lishu depression and by studying the main controling fault s nature,formation causes,present property as well as evolutive history, through analysing oil and gas accumulation and non-oil and gas accumulation,as well as the relation of fault and petroleum generating, migrating,accumulating.

By using the data of seism data, log data, core information, the framework of sequence strata and sedimentary facies in LiShu depression are analyzed and studied deeply, also the advantageous targets are researched and forecasted primarily.

Dehui depression,is located in the center of East fault depression of SE uplift,the south Songliao basin;north Changchun,cross Nong‘an and Dehui two counties.

Moreover, combined with structural geology feature of Dehui depression, the combination law of oil source bed, reservoir, caprock of Dehui formation is studied and the distribution area of favourable sand body is predicted.