关键词: 松辽盆地, 新生界, 生物气, 成藏条件, 有利区带, 勘探潜力

Abstract: The geologic environment in the Cenozoic of the Songliao Basin was analyzed.The conclusions show that high geothermal field, anoxic reduction environment in stagnant area,proper water medium mineralization and pH value in the Quaternary and Tertiary of Da'an Formation,as well as the rich humus organic materials are propitious to biogenic gas formation.The favorable fluvial and lake facies deposition environment,nice regional overlying rock,the structure relief resulted from upper weak tectonic movement are suitable for biogenic gas accumulation and reservoir.It is predicated that the areas in the western Changyuan in Daqing district and the southern Da'an and northern Lindian areas are favorable to generate biogenic gas reservoir,according to the properties of overlying rock and the distribution features of gas source rocks in the Quaternary and Tertiary of Da'an Formation.

Key words: Songliao Basin, Cenozoic, biogenic gas, reservoir condition, favorable areas, exploration potential