The Anjihaihe source rock characteristics and hydrocarbon accumulation condition in the southern edge of Junggar Basin
Wang Zhaoming1,2 Luo Xiaorong2 Zhang Liqiang3 Lu Xueying4 Lu Yongqiang5
1.Research Institute of Petroleum Exploration& Development|PetroChina|Beijing 100083； 2.Institute of Geology and Geophysics of Chinese Academy of Science|Beijing 100029； 3.Petroleum Geology|Institute of Earth Resources and Information|University of Petroleum(East China)|Dongying Shandong 257061； 4.China National Oil and Gas Exploration and Development Corporation|Beijing 100034|Beijing； 5.China National Logging Corporation|Beijing 100101
By Geochemistry analyzing，oil source comparing and basin modeling，evaluated the Paleogene Anjihaihe source rock in the Southern Junggar Basin，which is II Kerogen type and middle rich source rock，the limited depth of generate hydrocarbon is 3500 meters，and the time is 8 Ma，the oil stored in Tertiary formation derived from it and mixed with Jurassic Coals oil. The main reason of lowly appraising to it is the overpressure depress the maturation parameter of source rock，but the long and strong tectonic compression may promote the hydrocarbon generated from source rock，and the bury depth of source rock lay in the syncline great than the limited depth，which can generate lots of hydrocarbon，so this source rock is effective. The time of hydrocarbon generated and expelled suited with the forming of anticline，and in the course of anticline forming，with the producing and balancing of overpressure，the oil gradually accumulated on the top of the anticline. The more advantaged exploration areas are the first and second structure belt，the main intended formation are Anjihaihe set of Paleogene and Shawan set of Neogene.