摘要
伊通地堑大部分地区只发现油藏 ,天然气藏发现较少 ,借助最新分析资料 ,同时结合前人研究成果 ,对该地区天然气地球化学特征、运移效应进行了分析 ,以明确天然气的成因和运移方向 ,研究表明 ,伊通地堑的天然气主要为原油伴生气 ,重烃含量高 ,除莫里青地区的伊 2 3井和伊 14井双阳组一段和伊 2 1井永吉组二段为干气外 ,其他地区天然气均为湿气。伊通地堑天然气并非典型的油型气 ,也不是典型的煤型气 ,而是与其特定的母质类型有关。莫里青地区的天然气主要与凹陷深部的烃源岩亲缘关系密切。向东南方向 ,天然气发生明显的运移分异作用。
Oil pools were mainly discovered in the part of the Yitong garben and a fewer gas pools were discovered there. According to the new geochemical data and predecessors' researches, the geochemical behavior of natural gas and efficiency of migration in the Yitong garben were studied in this paper in order to expound the origin of natural gas and its migration distance. Natural gas in the Yitong garben is mainly accompanying gas with crude oil, with high contents of heavy hydrocarbons. Natural gas in the region of the Yitong garben is wet gas expect E 2s^1 in well Y23 and E 2y^2 in Y14 in the Moliqing rift. Natural gas in the Yitong garben rift is not typical oil type gas or coal-type gas. It is connected with the type of source rock. Natural gas from the Moliqing sag is connected with source rock affiliation of the sag. The natural gas shows obvious signs of apparent migration and differentiation in the SE direction. The gas pools of Yi23 well and Yi14 well were generated under the condition of migration and differentiation.
出处
《地质地球化学》
CSCD
2002年第3期59-63,共5页
Geology-Geochemistry
