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松辽盆地北部深层天然气绝大部分为干气，气源对比很困难。本文采用间接对比法，将源岩与天然气储层沥青中的生物标记物进行对比，认为深层天然气主要来自侏罗系和登娄库组地层。
Most of the deep natural gas in northern Songliao Basin is dry gas, and the comparison of gas sources is very difficult. In this paper, the indirect comparison method is used to compare the biomarkers in the source rock and natural gas reservoir bitumen. The deep natural gas is mainly from the Jurassic and Denglouku Formation.