苗忠英,王晶,潘春孚,何大祥,赵兴齐
MIAO Zhong-ying,WANG Jing,PAN Chun-fu,HE Da-xiang,ZHAO Xing-qi
摘要:
生物气不仅能以常规生物气藏的形式存在,而且还能以水合物、页岩气或煤层气等非常规形式存在,是非常重要的天然气资源。通过分析漠河盆地微生物生存所需的温度、盐度、酸碱度、生存空间和营养底物来源等条件,并结合微生物生命活动的证据认为:①漠河盆地地层水盐度不高、酸碱度适中、营养底物充足,具备微生物生命活动所需的基本条件;②饱和烃气相色谱出现“鼓包”现象,检测出25-降藿烷、乙烯和丙烯,δ13C1值小于-60‰,以及相邻地区发现生物气等现象是该区存在生物气的证据;③第四系受季节变换的影响,可周期性生成乙酸发酵型原生生物气;上侏罗统微裂缝发育段可形成CO2还原型次生生物气。生物气不仅是漠河盆地重要的天然气资源类型,也是天然气水合物潜在的气源之一。
中图分类号:
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