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在深入研究地层孔隙水中含气浓度及其影响因素的基础上，分析了欠压实泥质源岩中异常含气浓度的影响因素。利用异常孔隙流体压力和异常温度建立了欠压实泥质源岩异常含气浓度的计算公式，并将其应用于松辽盆地三肇凹陷青山口组泥质源岩异常含气浓度的计算中，结果表明该区青山口组泥岩具有0．5～0．8m3／m3的异常含气浓度，对下伏扶、扬油层中的扩散相天然气具有强的封闭能力。表明该方法用于研究欠压实泥质源岩的异常含气浓度具有可行性，它不仅考虑了异常孔隙流体压力的影响，而且还考虑了异常温度的影响，较以往的研究方法更切实际。
Based on the deep study of the gas concentration in the pore water and its influencing factors, the influencing factors of the abnormal gas concentration in the undercompacted mudstone are analyzed. The formula of abnormal gas concentration of undercompacted mudstone source rock was established by using the pressure of abnormal pore fluid and abnormal temperature. The formula was used to calculate the gas concentration of mudstone source rock in Qingshankou Formation in Sanzhao Sag, Songliao Basin The results show that the Qingshankou Formation mudstone in this area has an abnormal gas concentration of 0.5-0.8 m3 / m3 and strong sealing ability to the diffused phase natural gas in the Fufang and Yang reservoirs. The results show that this method is feasible to study the abnormal gas concentration in under-compacted mudstone. It not only considers the influence of abnormal pore fluid pressure, but also considers the influence of abnormal temperature, which is more practical than previous research methods .