青藏高原海相烃源岩生排烃模式

在青藏高原实地踏勘采集了大量样品 ,首次成功地进行了青藏高原海相烃源岩的生排烃热压模拟实验。在对实验产物和残渣计量、检测后 ,总结、归纳出 4类青藏高原海相烃源岩生排烃模式 :Ⅰ型泥页岩生排烃模式、Ⅱ1型泥页岩生排烃模式、Ⅱ1型灰岩和泥灰岩生排烃模式、沥青生排烃模式。这些模式的建立为正确评价、研究该区海相烃源岩和资源量计算提供了可靠的依据。就这 4类模式之间、这些模式与常规模式之间进行了对比 ,找出了它们之间的异同点 ,这对进一步研究青藏地区具有重要意义。模拟实验结果与露头剖面实际分析资料对比表明 ,通过模拟实验所建立的青藏高原海相烃源岩的生排烃模式基本上能够反映地下生排烃的实际情况。图 3表 1参 1

Hydrocarbon generating and expulsion models of the marine source rocks in the Tibet Plateau.

The author acquired a lot of samples after field survey on the World Ridge--the Tibet Plateau, and further selected some certain representative experimental samples which are adaptive to simulation based on the prophase experiments. After making a lot of conditional experiments and combining the simulation samples with experimental apparatus, the author selected some adaptive conditions for simulation experiments. Thus, the thermocompression simulation experiments have been successfully conducted on the marine hydrocarbon source rock in the Tibet Plateau. Furthermore, some generated oil and gas were successfully acquired. After measuring and examining the experimental products and residue, this paper summed up four kinds of hydrocarbon models for marine hydrocarbon source rock in the Tibet Plateau. The establishment of these models provides some reliable support for correct assessment, study and resource extent calculation for marine hydrocarbon source rock in this area. At the same time, this paper compared these models with normal models and got the similarities and differences between them, which is significant to the study in this area. Comparisons of the simulation experiment results with the actual analysis on outcrop section show that the models established through simulation experiments can approximately reflect the real situation of the subsurface hydrocarbon generating and expulsion, which in turn reflect the correctness of simulation experiment results.