柴达木盆地YS1井岩屑气组成特征及天然气来源

钻进中岩屑气中无机和有机气体组成的快速测定及评价,对油气勘探有重要意义,目前仅有岩屑气中烃类检测方法。利用气相色谱技术,采用2根填充柱（5A型分子筛和Porapak Q）、2种载气（He、N2）、3次进样（分析O2、N2、CH4组分;分析H2、He组分;分析烃气、CO2组分）、外标法和面积归一化法测定岩屑气组成。实验分析和现场应用研究结果表明,岩屑气中无机和烃类气体组分都得到了很好的分离,岩屑气组成测定方法的准确度高、重复性好;柴达木盆地北缘YS1井岩屑气及天然气主要组成为氮气和甲烷,属于富氮或高氮天然气,为过成熟煤型气,来源于深部侏罗系烃源岩。

Composition characteristic of the detritus gas and origin of natural gas in YS1 well of Qaidam basin

The detritus gas compositions are an important parameter to the exploration of oil and gas in well drilling.A gas chromatographic method is developed for the detritus gas compositions.The detritus gas compositions Determines by using two packed column(5A type molecular sieve and Porapak Q)and three inject sample(Analysis compositions of the O2 and N2 and CH4,of the H2 and He,of the hydrocarbons gas and CO2 and H2S) and external standard method and area normalization method.The results of experimental analys...