论文部分内容阅读
本文研究了天然气中氮的地球化学特征，并讨论了氮的成因。中国含油气盆地内绝大多数天然气的含氮量小于６％，测得天然气的δ１５Ｎ值分布在－５７‰和＋９５‰之间．多数在－２０‰＋２０‰的范围内。沉积盆地内天然气中的氮以分子形式被吸附于岩石的碎屑表面或以游离状态分布于岩石孔隙中。富氮天然气主要分布于深大断裂带或新生代岩浆活动地区。天然气的氮既有有机成因的，也有无机成因的。
This paper studies the geochemical characteristics of nitrogen in natural gas and discusses the genesis of nitrogen. The majority of natural gas in China’s petroliferous basins contains less than 6% nitrogen, and δ15N values of natural gas are distributed between -57 ‰ and + 95 ‰. Most in the range of -20 ‰ +20 ‰. Nitrogen in the natural gas in the sedimentary basin is molecularly adsorbed on the surface of the rock fragments or distributed in the rock pores in a free state. Nitrogen-rich natural gas is mainly distributed in the deep fault zone or Cenozoic magmatic activity areas. Natural gas nitrogen both organic causes, but also inorganic causes.