摘要
松辽盆地浅层气藏是指下白垩统嫩江组二、三、四段和上白垩统明水组一段含气层。钻探证实，具工业气流，且多数分布在盆地中央拗陷区的萨尔图、新北、葡萄花、龙虎泡、木头、红岗油田和敖南鼻状构造等之上的浅部地层。气源主要来自中部含油气组合和嫩一、二段生油层，不排除少量生物气的混入。嫩二、三、四段及明一段的砂岩组为气藏储集空间，粉－细砂岩为主，岩性疏松，孔隙度在２５％以上。嫩三段黑色泥岩在盆地内稳定分布，为嫩二段气藏的良好区域盖层；嫩三段气藏之上有厚２５～３０ｍ的较纯泥岩，明水组一段气藏上部也有厚２０～２５ｍ的黑色泥岩，均在盆地内稳定分布。浅层气藏受断裂控制，大多数气藏分布在断裂带上和断层的两盘（多数在下盘）。浅层气藏和已知油田相伴生，若改进试气工艺及方法，有针对性地进行浅层天然气勘探，其前景将十分广阔。
The Shallow gas reservoirs in Songliao Basin are the gas-bearing formations of K1n2,K1n3,K1n4, and K2m1. Commercial gas flows are found by drilling. They are distributed over the Shallow formations of Saertu, Xinbei, Putaohua, Longhupao, Mutou and Honggang oil fields and the upper parts of Aonan nose structure.Gas soruces mainly are from the combination of central oil-gas-bearing and oil-bearing formations of K1n1 and K1n2,including a few of infiltrated biogas. The sandstone formations of K1n2,K1n3,K1n4 and K2m1 are po reservoirs with loose lithnology and over 25 % porosity. The black Shale of K2n3 stably distributed in the Basin is the good regional caprock of K1n2 gas reservoir. Purer Shale with 25-30 m thickness is on the top of K1n3 gas reservoir. Black Shale with 20-30m thickness is on the top of K2m1 gas reservoir. The shales are stably distributed in the Basin. The most perts of shallow gas reserviors controlled by ruptures are distributed in fracture belt and the upper and lower walls of fault(mostly in the lower walls). Shallow gas reservoirs are associated with the known oil fields. If the measures of gas testing are improved,the exploration of shallow gas will have a vast prospect.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
1995年第1期13-17,共5页
Natural Gas Industry
关键词
松辽盆地
浅层气
地质特征
气藏
天然气勘探
Songliao Basin, Shallow gas, Geological characteristics, Exploration.
