摘要
莫里青断陷烃源岩成熟度不高,在断陷的大部分地区只发现油藏,其溶解气含量也很低,但在断陷的东南部靠近东南缘的伊23井和伊14井发现了以气为主的气藏。认为莫里青断陷的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的天然气;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,伊23井和伊14井气藏是油气运移分异作用下形成的。
The oil pools were mainly discovered in the part of Moliqing rift, a fewer gas pool was discovered. According to the new geochemical data and predecessor′ researches, the geochemical characteristic of natural gas and efficiency of migration in Moliqing rift were studied in this paper, in order to expound the origin of natural gas and distance of migration. The natural gas in Moliqing rift are mainly accompanying gas with crude oil, the content of heavy hydrocarbon is high. The natural gas in region of Moliqing rift is wet gas expect the gas of E_2s^1 in well Y23 and E_2y^2 in Y14 in Moliqing rift. The natural gas in Moliqing rift is not typical oil type gas or coal-type gas. It is connected with type of soured rock. The natural gas of Moliqing rift is connected with source rock affiliation of sag. The natural gas has apparent migration and differential action in the direction of southeast. The gas pool of Y23 well and Y14 well were generated in condition of migration and differential action. The steps model is one of important accumulation model in Moliqing rift.
出处
《天然气地球科学》
EI
CAS
CSCD
2005年第3期274-277,共4页
Natural Gas Geoscience
关键词
天然气
油气运移
分异作用
莫里青断陷
Natural gas
Oil and gas migration
Differential action
Moliqing rift.
