研究结果表明，沙四段下亚段盐间发育的暗色泥岩为主要烃源岩，属于“自生自储”型气藏。
The result shows that dark mudstone of lower Es4 is the main source rock and the gas reservoir belongs to source and reservoir in the same bed.
CO2脱出量与岩石碱质含量正相关。松辽盆地北部昌德东CO2气藏成藏模式为“自生自储”，成藏CO2气主要来自深部被火山岩吸附的气。
The genetic model of the Changdedong CO2 reservoir is "self-generation and self-accumulation", and the CO2 gas is mainly CO2 derived from the depth and adsorbed by volcanic rocks.
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