摘要
陆良盆地是云南省第三系沉积盆地的典型代表。盆地烃源岩有机碳含量高，以腐泥腐殖型为主，成熟度低，以形成生物（细菌）气为主。盆地具有生物气形成的优越条件。盆地储集层以高孔中渗和高孔低渗两类为主，盖层岩石的封闭能力弱，保存条件欠佳。盆地第三系有一个含气系统，即Ｎ２ｃ２－Ｎ２ｃ３（！）含气系统。上第三系茨营组二段（Ｎ２ｃ２）为主力烃源岩，三段（Ｎ２ｃ３）为优势储集岩，而Ｎ２ｃ４为区域盖层。
Luliang Basin is a typical representative of Tertiary sedimentary basins in Yunnan Province. The organic matter of the source rock in the basin is of low maturity, but its abundance is high. The organic matter is mainly saprohumic or humic type, which is good to generate biogas. There are good conditions for the generation of biogas in the basin. The reservoir rocks in the basin have mainly two types, namely, the high porosity, middle permeability and high porosity, low permeability. The quality of the cap rock is not good in the basin. There is a gas system in the basin, that is, N 2 c 2 - N 2 c 3(!) gas system. The Second Member of Neogene Ciying Formation ( N 2 c 2) is the main source rock, the Third Member of Neogene Ciying Formation (N 2 c 3) is the main reservoir rock, and the Forth Member of Neogene Ciying Formation (N 2 c 4) is the main cap rock.
出处
《成都理工学院学报》
CSCD
1999年第2期127-134,共8页
Journal of Chengdu University of Technology
关键词
云南
陆良盆地
第三系
含气系统
油气勘探
gas (petroleum) system
biogas
immature hydrocarbon
Luliang Basin
