【摘要】 利用地层孔隙热压生排烃模拟实验方法,开展叠层石灰岩从低熟—成熟—高成熟系列的热演化模拟实验。结果表明:叠层石灰岩单位有机碳的生油产率随着温度增加先增后降,生油高峰约在360℃,对应最大生油产率约为379. 99 kg/t,排油率为34%～68%;模拟气体产物中以二氧化碳产率最大,其次为氢气产率,烃气产率最小,烃气生成高峰约在380℃,对应最大烃气质量产率为101. 74 kg/t;模拟所得残留油和排出油总体上表现为高含非烃和沥青质、低含饱和烃和芳香烃的特点;在含相同有机碳数量的背景下,叠层石灰岩最大生烃产率小于灰质白云岩和灰色泥岩,但高于泥灰岩,尤其是叠层石灰岩具有更高的烃气产率和更低的有效烃源岩有机碳下限。更多还原

【Abstract】 The simulation experiment of thermal evolution of stromatolite limestone from low to high maturity was conducted through the formation porosity thermocompression simulation experiment of hydrocarbon generation. The results show that the oil production rate of organic carbon in stromatolite limestone falls after increasing first with the raise of temperature. The oil generation peak is at 360 ℃ and the maximum oil production rate is 379. 99 kg/t. The amount of oil expulsion rate is between 34%-68%. It is found that the CO₂ has the largest yield,followed by H₂,and hydrocarbon gas shows the smallest yield in the simulated gas product. The generation peak of hydrocarbon gas is at 380 ℃ and the maximum hydrocarbon gas production rate is 101. 74 kg/t. The residual oil and discharge oil product both show the characteristics of more nonhydrocarbon and asphaltene,as well as fewer saturated hydrocarbon and aromatic hydrocarbon. The oil production rate of stromatolite limestone is less than that of argillaceous dolomite and gray mudstone but more than that of marlstone in the same amount of organic carbon. Especially,the stromatolite limestone has higher hydrocarbon gas production rate and lower TOC minimum as resource rocks.更多还原