The kinetic parameters of hydrocarbon generation are determined through experimental simulation and mathematical calculation using four typical samples selected from the Cretaceous Nenjiang Formation in the northwest ...The kinetic parameters of hydrocarbon generation are determined through experimental simulation and mathematical calculation using four typical samples selected from the Cretaceous Nenjiang Formation in the northwest of Songliao Basin,Chang 7 Member of Triassic Yanchang Formation in the southwest of Ordos Basin,Paleogene in the southwest of Qaidam Basin,and Lucaogou Formation of Jimusar Sag in the east of Junggar Basin.The results show that activation energy of hydrocarbon generation of organic matter is closely related to maturity and mainly ranges between 197 kJ/mol and 227 kJ/mol.On this basis,the temperature required for organic matter in shale to convert into oil was calculated.The ideal heating temperature is between 270℃and 300℃,and the conversation rate can reach 90%after 50-300 days of heating at constant temperature.When the temperature rises at a constant rate,the temperature corresponding to the major hydrocarbon generation period ranges from 225 to 350℃at the temperature rise rate of 1-150℃/month.In order to obtain higher economic benefits,it is suggested to adopt higher temperature rise rate(60-150℃/month).The more reliable kinetic parameters obtained can provide a basis for designing more reasonable scheme of in-situ heating conversion.展开更多
松辽盆地中央坳陷上白垩统嫩江组是一套分布面积广、厚度大、富含有机质的低熟页岩层系。根据测井资料和岩心实测数据,研究页岩有机质丰度和类型的空间非均质性,据此建立地质模型,并基于生烃动力学和热传导模型,对研究区电加热原位改质...松辽盆地中央坳陷上白垩统嫩江组是一套分布面积广、厚度大、富含有机质的低熟页岩层系。根据测井资料和岩心实测数据,研究页岩有机质丰度和类型的空间非均质性,据此建立地质模型,并基于生烃动力学和热传导模型,对研究区电加热原位改质资源潜力进行预测。嫩江组各段总体上处于未成熟—低成熟阶段,是以生油为主的烃源岩。嫩江组一、二段古水体为淡水—微咸水,生烃母质主要为藻类体,有机质类型以Ⅱ1—Ⅱ2型干酪根为主,其中嫩一段烃源岩综合品质最好,优质烃源岩主要分布在长岭凹陷新北—大安地区。通过原位电加热模拟可以推断,2 k W加热功率下,页岩温度上升迅速,在加热4年后温度可达到600℃以上;1 kW加热功率下,则需要约8年。有机质转化率在加热到第五年时已经接近100%,达到原位改质最大资源丰度;加热至第五年末,在2 kW功率下,嫩一段页岩可产生的页岩油资源量为245.02×10^8t,嫩二段为65.89×10^8t。展开更多
基金Supported by the PetroChina Science and Technology Major Project(2016E-0101).
文摘The kinetic parameters of hydrocarbon generation are determined through experimental simulation and mathematical calculation using four typical samples selected from the Cretaceous Nenjiang Formation in the northwest of Songliao Basin,Chang 7 Member of Triassic Yanchang Formation in the southwest of Ordos Basin,Paleogene in the southwest of Qaidam Basin,and Lucaogou Formation of Jimusar Sag in the east of Junggar Basin.The results show that activation energy of hydrocarbon generation of organic matter is closely related to maturity and mainly ranges between 197 kJ/mol and 227 kJ/mol.On this basis,the temperature required for organic matter in shale to convert into oil was calculated.The ideal heating temperature is between 270℃and 300℃,and the conversation rate can reach 90%after 50-300 days of heating at constant temperature.When the temperature rises at a constant rate,the temperature corresponding to the major hydrocarbon generation period ranges from 225 to 350℃at the temperature rise rate of 1-150℃/month.In order to obtain higher economic benefits,it is suggested to adopt higher temperature rise rate(60-150℃/month).The more reliable kinetic parameters obtained can provide a basis for designing more reasonable scheme of in-situ heating conversion.
文摘松辽盆地中央坳陷上白垩统嫩江组是一套分布面积广、厚度大、富含有机质的低熟页岩层系。根据测井资料和岩心实测数据,研究页岩有机质丰度和类型的空间非均质性,据此建立地质模型,并基于生烃动力学和热传导模型,对研究区电加热原位改质资源潜力进行预测。嫩江组各段总体上处于未成熟—低成熟阶段,是以生油为主的烃源岩。嫩江组一、二段古水体为淡水—微咸水,生烃母质主要为藻类体,有机质类型以Ⅱ1—Ⅱ2型干酪根为主,其中嫩一段烃源岩综合品质最好,优质烃源岩主要分布在长岭凹陷新北—大安地区。通过原位电加热模拟可以推断,2 k W加热功率下,页岩温度上升迅速,在加热4年后温度可达到600℃以上;1 kW加热功率下,则需要约8年。有机质转化率在加热到第五年时已经接近100%,达到原位改质最大资源丰度;加热至第五年末,在2 kW功率下,嫩一段页岩可产生的页岩油资源量为245.02×10^8t,嫩二段为65.89×10^8t。
