A Study on Hydrocarbon Potential of Coal-measure Source Rock in Prospect Area of Daqing

Prospect Area of Daqing consists of Songliao Basin and the basins around it.The exploration confirms that coal seams and coal-measure source rocks in Upper Jurassic,Lower Cretaceous and Tertiary are potential hydrocarbon source rocks of oil and gas in these basins The studies of these hydrocarbon source rocks are significative for exploration of coal measure-derived hydrocarbon in these basins.For this reason,hydrocarbon generation and exploration potential of the coal-measure source rocks were studied using organic geochemistry,organic petrology and expermental simulation of hydrocarbon generation,combining burial history and thermal history of the source rocks.The results indicate that the hydrocarbon generation potential of the coal-measure source rocks may be divided into four kinds,i e. good source rock,middle source rock,poor source rock,non-source rock.They affect exploration of coal measure-derived hydrocarbon because their hydrocarbon generation characteristic and hydrocarbon generation model are different.The comprehensive study on geology and geochemistry indicates that the exploration prospects for coal measure-derived oil are better in Hailaer basin,the exploration objective for coal measure-derived oil is low mature oil in Tangyuan Rift,the exploration objective for coal measure-derived oil is secondary oil pool in Jixi basin,the exploration prospects for coal measure-derived hydrocarbon is coal-related gas.