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| 1 | Evolutive characteristics of aromatics under high pressure and temperature of deep lithosphere显示文摘Pyrolysis of lignite in closed systems was conducted at temperatures from 400 to 700℃ and pressure from 1 to 3 GPa in order to investigate the evolutive characteristics of aromatics and the effects of pressure and temperature on the maturation of organic matter under the extreme conditions. The total yield of liquid hydrocarbons decreased with increasing pressure and the aromatics shows more mature with increasing temperature at a given pressure. The data indicate that high pressure significantly suppresses the thermal evolution of geological organic matter especially at lower temperature, but favors the cyclization, polymerization and aromatization of pyrolysate. The pressure effect on maturation of organic matter is nonlinear. Therefore, it can be inferred that sediment organic-matters in the subducted slab could be retained in the deep lithosphere, and the results are also significant for understanding the accumulation and preservation of petroleum in deep reservoirs. | WANG ChuanYuan1,2,4, DU JianGuo1?, DUAN Yi 2, XIE HongSen3, CHEN GuoJun2 & WANG WanChun2 1 Insititute of Earthquake Science, China Earthquake Admnistration, Beijing 100036, China 2 Lanzhou Insititute of Geology, Chinese Academy of Sciences, Lanzhou 730000, China 3 Insititute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China 4 Yantai Institute of Coastal Zone Research for Sustainable Development, Chinese Academy of Sciences, Yantai 264003, China | 2007 | Science China Earth Sciences2007，50，10： | 3 |
| 2 | 压力对有机质生烃演化作用的研究进展显示文摘在研究压力对有机质热演化作用的影响过程中,模拟实验主要采用金管热解的方法,所得结果大多没有发现压力对有机质演化存在明显影响。而采用定体积高水压反应釜含水热解实验通常得出压力抑制有机质成熟度的结论。超压盆地的研究结果认为,采用定体积高水压反应釜含水热解实验比较接近实际地质条件,但考虑静岩压力的WYMN-3型温—压生烃模拟仪(兰州油气资源研究中心)或地层孔隙热压生排烃模拟实验仪(无锡石油地质研究所)更具优势。实验与理论相结合的分析认为,高水压通过增大PV来增大反应活化能(E_a),通过减小熵变(ΔS)来减小反应频率因子(A)。现阶段研究超压盆地比较适用的是PreRo^(TM)模型和模型,但两者都只考虑了超压而非孔隙流体压力。因此需要进一步对含流体压力的动力学模型进行研究。另外,目前学界采用的研究方法并不统一,这掣肘了同类实验间的对比,需要一套标准实验体系进行系统性研究。此外,高过成熟度页岩气的勘探与开发为研究压力对高过成熟有机质生气作用的影响提供了宝贵地质资料,但亟需解决海相页岩成熟度的精确测定问题。 | 何春民 李腾飞 | 2018 | 沉积学报2018，36，5： | 2 |
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