原油裂解成气研究进展

原油裂解气可以作为重要的天然气来源,将是未来重要的勘探方向之一。对原油裂解成气研究方法、产物特征、识别标志、原油裂解程度定量表征、原油裂解成气门限、主成气期、影响因素以及中国原油裂解气区的主要勘探及研究态势进行了总结和评述。认为原油裂解成气的门限和主生气期是原油裂解气形成中的关键科学问题,尤其是在超压条件下,原油裂解成气的主生气门限、化学动力学问题及原油裂解成气定量预测等研究需要加强;盐岩及其体系中的不同矿物对原油裂解成气的影响及机理尚不明确;中国东部湖相原油裂解气研究仍显薄弱,为加强对湖相裂解气形成与分布规律的正确认识,丰富原油裂解气形成理论,缓解中国东部天然气资源短缺问题,针对中国东部陆相断陷湖盆应进一步开展原油裂解气的相关研究。

Research Progress of Oil Cracking into Gas

The oil-cracking gas can be an important source of natural gas and will be one of the important exploration directions in future.This paper summarized and discussed the current status of research and investigation in such areas as the study method for oil cracking into gas and the characteristics of products,the identification marks,the quantitative characterization showing the extent of oil cracking,the threshold for the oil cracking into gas,the main oil-cracking gas formation period,influencing factors and regions of oil cracking into gas in China.The paper suggests that the threshold for the oil cracking into gas and the main oil-cracking gas formation period are the key scientific problems in the formation of oil-cracking gas.Especially,in the condition of overpressure,the studies on the thres-hold and the chemical kinetic problem as well as the quantitative forecasting for the oil cracking into gas are need to be stressed;the effect and mechanism of the saline rocks and different minerals in the system on the oil cracking into gas are not clear;the investigation of the lake facies oil-cracking gas in eastern part of China is still weak.Many works should be furthered to reveal the law for the oil-cracking gas generated in lake-basin in eastern part of China,and this is helpful to relieve the shortage in the supply of natural gas.