吐哈盆地丘东次凹低熟气的生成与动力学研究  

Low Mature Gas Generation and Kinetics in Qiudong Depression,Turpan-Hami Basin

作　　者：张长春[1,2] 陶伟[1,2] 张馨[1,2] 王晓峰[2,3] 邹艳荣[1] 

机构地区：[1]中国科学院广州地球化学所有机地球化学国家重点实验室,广州510640 [2]中国科学院研究生院,北京100049 [3]中国科学院地质与地球物理研究所兰州油气与资源研究中心,兰州730000

出　　处：《沉积学报》2008年第5期857-863,共7页Acta Sedimentologica Sinica

基　　金：国家973项目(2007CB209501);国家自然科学基金项目(批准号:40572083)资助

摘　　要：采用黄金管—高压釜封闭体系,对吐哈盆地艾试1井的泥岩和煤岩进行了低温热解实验。根据实验结果,分别求取了干气(C1)、湿气(C2～C5)生成过程的初始动力学参数,然后将单一活化能的动力学参数进一步优化为具有高斯分布的活化能,优化后的动力学参数能较好拟合实验数据。利用优化后的动力学模型模拟了吐哈盆地丘东凹陷八道湾组天然气早期生成过程,并将模拟结果与实际地质资料进行了对比。结果表明,经过优化后的低温恒温热解动力学,能有效评价早期生气过程;在丘东次陷发现的天然气,与八道湾组源岩关系密切。The low temperature pyrolysis for coal and mudstone samples collected from Well AS-1 in Turpan-Hami basin was carried out in the closed system with gold-tube autovlaves. The initial kinetic parameters of dry and wet gases generation are calculated according to the pyrolysis data. Then the kinetic parameters of single activation energy are further optimized into Gaussian distribution of activation energies, which is better to fit empirical data. The optimized kinetic parameters are applied to modeling the early gas generation of Badaowan Formation in Qiudong subsag, Turpan-Hami basin, which shows that the modeling results match well with the geological process of early natural gas generation; the isothermal pyrolysis at low temperature is an effectual way to evaluate the early gas generation; the natural gas discovered in Qiudong subsag is closely associated with the source rocks of the Badaowan Formation.

关 键 词：热解 天然气 动力学 低熟气 吐哈盆地 

分 类 号：TE122.1[石油与天然气工程—油气勘探]