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通过周口坳陷午参２井富有机质泥岩的热模拟实验，研究了温度与累计产气量、每一温阶产气量及产率的关系。研究表明：①在模拟温度范围内，累计产气量、累计气态烃量、累计气态非烃量随着温度升高而呈直线增加，而且每一温阶内产气量、非烃气量及其产率也随温度的增加呈直线增加，并于４５０℃达到最大值。②当温度为２００～３５０℃时，气态烃含量、每一温阶气态烃量及其产率随着温度的升高而增加，ｉＣ４／ｎＣ４，ｉＣ５／ｎＣ５，Ｃ１／（Ｃ２～Ｃ４）的比值以及ＣＯ２，Ｎ２的含量随温度增加而减少，Ｈ２含量随温度增加而增加；说明有机质处于成熟阶段，以生成液态烃和湿气为主，化学演化以断开侧链或支链为主。③当温度大于３５０℃时，随温度升高，甲烷含量继续增加，并于４００℃达到最大值；ｉＣ４／ｎＣ４，ｉＣ５／ｎＣ５的比值随温度升高而缓减，Ｃ１／（Ｃ２～Ｃ４）随温度升高而剧增，ＣＯ２，ＣＯ含量也有所增加；这些特征表明生烃有机质处于高成熟过成熟期，以生成干气为主，化学演化以高温裂解、杂原子断键为主。
Through the thermal simulation experiments of organic matter-rich mudstone in No.2 Well in Zhoukou Depression, the relationship between temperature and cumulative gas production, gas production per temperature step and productivity was studied. The results show that: ① In the simulated temperature range, the accumulated gas production, cumulative gas production and cumulative non-hydrocarbon production increase linearly with increasing temperature, and the gas production, non-hydrocarbon production and yield at each temperature range Also increases linearly with the increase of temperature and reaches the maximum at 450 ℃. ② When the temperature is between 200 and 350 ℃, the content of gaseous hydrocarbons, the amount of gaseous hydrocarbons at each temperature level and the yield of gaseous hydrocarbons increase with the increase of temperature. The ratio of iC4 / nC4, iC5 / nC5, C1 / (C2 ~ C4) The content of CO2 and N2 decreased with the increase of temperature, and the content of H2 increased with the increase of temperature. It indicated that the organic matter was in the mature stage to produce liquid hydrocarbon and moisture, and the chemical evolution was dominated by breaking the side chains or branches. ③ When the temperature is higher than 350 ℃, the content of methane increases with the increase of temperature and reaches the maximum at 400 ℃. The ratio of iC4 / nC4 and iC5 / nC5 decreases with the increase of temperature, and the ratio of C1 / (C2 ~ C4) The contents of CO2 and CO also increased with the increase of temperature. These characteristics indicated that the hydrocarbon-generating organic matter was in high maturity and maturity stage, and mainly generated dry gas. The chemical evolution was mainly pyrolysis and heteroatom bond breaking.