【作者】 王连生；

【导师】 马志红； 郭占谦；

【作者基本信息】 吉林大学 ， 矿物学、岩石学、矿床学， 2006， 博士

【摘要】 本文通过分析大庆长垣天然气的地球化学特征并结合盆地基底的岩性、构造特征对天然气中非烃组份的成因以及气油比、油藏饱和压力等变化规律进行了研究和讨论。天然气的碳、硫同位素分析结果表明,非烃组份含量的升高、气油比的增大与盆地基底古生代地层(石炭-二叠系)及新构造运动有关。文章依据长垣气顶位置和各油田气油比、饱和压力、甲烷组份含量等参数结合油田构造特征提出了长垣天然气的“动态模式”,认为长垣伴生气始终处于深部气(藏)的补充之中,频繁的新构造运动加剧了长垣天然气南北的不平衡。同时,文章对深部烷烃气可能的有机和无机来源提出了自己的见解,认为松辽盆地的火山活动以及基底结构特征造就了其海相生烃、陆相生烃及地球深部无机生烃的多元油气生成及共生资源模式。更多还原

【Abstract】 In recent years, the hydrocarbon gas fields such as Wangjiatun, Shengping and Changde were discovered in Xujiaweizi Rift in Songliao Basin. In the main time, the geochemistry abnormities were also found in such hydrocarbon and non-hydrocarbon gas and caused many discussions about the origin of the gas fields. By the end of 2005, 1018×108m~3 deep natural gas was proved up in Daqing. The deep gas exploration was developed greatly.Most of natural gas was dissolved gas in the production in Daqing before. The accumulative total output reached 700×108m~3. In the course of the exploration and the development of dissolved gas, especially after 90s of last century, three main problems appeared:1. The non-hydrocarbon contents such as CO2 and H2S were rising rapidly;2. The gas-oil ratio of Lamadian, Sartu and Xingshugang region in Daqing placanticline rose up, the average gas-oil ratio reached 47.45M3/t,it was 61.8% higher than 1994;3. The gas cap in Lamadian is the only gas cap in Daqing placanticline, but Lamadian isn’t the highest structure in placanticline. Many parameters in the north of the reservoir was higher than that of in the south such as original saturation pressure, original gas-oil ratio and the content of CH4.After the mid of the 90s, these differences between更多还原