摘要
配制了两套成熟度相近的碳酸盐岩和泥质岩丰度系列样品。采用半封闭外加温加压式热压模拟装置对碳酸盐岩的生烃情况进行了热模拟实验,研究了碳酸盐岩生气量随成熟度和温度变化的趋势,探讨了碳酸盐岩生气的变化规律。碳酸盐岩与泥质岩的生烃潜力是有机质质量和有机质丰度的函数,与岩性无关;碳酸盐岩的产气规律与泥质岩相似,而且两者产烃的量级也相当,并不存在碳酸盐岩生排烃效率高的现象;碳酸盐岩和泥质岩总有机碳(TOC)含量在热模拟过程中基本上不发生变化;不同岩性的有机质的产烃效率主要受温度和有机质类型决定。
Two series of carbonate rocks and argillaceous rocks with similar maturity are confected. Hydrocarbon generating process of the carbonate rocks is thermally simulated with a semi closed simulative equipment by heating and pressuring. The variation of the gas generating quantity of carbonate rocks with different maturity and temperature is studied compared with the argillaceous source rocks. The gas generating rules of the carbonate source rocks are discussed. The hydrocarbon generating potentials of both argillaceous and carbonatesource rocks are the function of the quality and abundance of organic matter, regardless of the lithology. The gas generating rule of carbonate source rocks resembles that of the argillaceous source rocks, with the same quantity of theirhydrocarbon generated. It is not found that the carbonate source rocks has higher efficiency of generation and expulsion of hydrocarbon. During the thermal simulation, the total organic carbon contents of both the rocks change little. The temperature and the types of organic matter are crucial to the hydrocarbon generating efficiency of organic matter with different lithology.
出处
《地球化学》
CAS
CSCD
北大核心
2003年第1期29-34,共6页
Geochimica
基金
国家重点基础研究发展规划项目("973"项目)(G19990433)
