论文部分内容阅读
本文利用氯仿沥青的族组成,色谱和红外光谱资料,讨论了柴达木盆地第四系至上新统可溶有机质的演化特征及其阶段性。地层厚达6000米,沉积速度高达0.5mm/年,井底地温高达198℃,各项地化资料表明,沉积中的有机质经历了一个相当完整的连续的生物化学和热化学的演化过程——从有机质沉积埋藏开始,历经未成熟、成熟至达高成熟的凝析油和湿气阶段;从而确立了有机物沉积和成油之间直接的成因联系。该井有机质沉积到成熟只用了650万年时间,成油临界的井深为3300米,地温120℃;当埋深达5000余米,地温172℃以上时,则已经进入凝析油和湿气阶段了。
In this paper, the evolutionary characteristics and stage of soluble organic matter in Quaternary to Upper Pliocene of Qaidam Basin are discussed by using the composition, chromatographic and infrared spectral data of chloroform bitumen. The formation is 6,000 meters thick, the deposition rate is as high as 0.5mm / year and the bottomhole temperature is as high as 198 ℃. Various geochemical data show that the organic matter in sediments underwent a fairly complete and continuous evolution of biochemistry and thermochemistry - From the beginning of deposition and deposition of organic matter, it has undergone immature and ripening to mature phase of condensate and moisture. Thus, the direct genetic connection between organic deposition and oil formation has been established. The organic matter deposition of the well only took 6.5 million years to mature. The critical oil well depth was 3300 meters and the ground temperature was 120 ° C. When the depth was more than 5000 meters and the ground temperature was above 172 ° C, the well had entered the condensate and moisture Stage has.