摘要
“天然气扩散系统”是指在地层剖面中具有１个或２个扩散源、天然气只能在一定范围内扩散运移的一套地层体系。主要有４种类型：①扩散源与上覆扩散源皆为正常压实气源岩；②扩散源为正常压实气源岩，上覆扩散源为欠压实气源岩；③扩散源为欠压实气源岩，上覆扩散源为正常压实气源岩；④扩散源与上覆扩散源皆为欠压实气源岩。依此划分了松辽盆地大庆长垣以东地区深层天然气扩散系统，分析各扩散系统的演化特征。按照扩散系统计算，该区侏罗系天然气扩散损失量为２７０６×１０８ｍ３，白垩系登娄库组二段天然气扩散损失量为４６３０×１０８ｍ３，表明该区深层天然气扩散损失量应主要来自登二段气源岩，而不是侏罗系气源岩。认为以往的计算结果夸大了侏罗系天然气扩散损失量，低估了该区深层侏罗系含气远景。图４参３（梁大新摘）
Based on analyzing deep diffusion mechanism of
gas on the conditions of many gas sources, this paper puts forward a concept
of gas diffusion system and its main types. According to the results of
division the gas diffusion system and their evolution characteristics analysis for
deep part of the region, it indicates that the diffusion losing amount of gas in
deep part of the region should come mainly from K1d2 gas source rock, not
from Jurassic gas source rock. The result calculated by the old method
overestimated the gas losing amount of Jurassic strata by diffusion, and
underestimated the gasbearing prospects of the strata.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
1999年第2期101-104,共4页
Petroleum Exploration and Development
关键词
深层天然气
天然气扩散系统
扩散损失量
Songliao basin,
Deep zone , Natural gas , Jurassic period , Cretaceous period , Formation , Gas Source
rock , Gas diffusion system , Diffusion losing
