摘要
“七五”期间，我国天然气勘探的重大突破之一就是在鄂尔多斯盆地中部奥陶系顶部风化带中发现了大气田。目前，对其气源的认识存在着分歧。多数人认为是下古生界碳酸盐岩“自生自储”的碳酸盐岩气或以碳酸盐岩气为主混入了部分石炭、二叠系煤系的煤成气。而本文作者认为，上述天然气主要是源于石炭、二叠系的腐殖型热成气，依据是：①奥陶系风化带的天然气属于煤成气；②石炭、二叠系煤系是盆地的主要气源岩；③具有“上古生、下古储”的良好成藏条件。据此提出了该区天然气远景评价和勘探选区意见。
At present, most people consider that the gas in Eerduosi Basin is carbonate rock gas from Lower Palaeozoic group carbonate rock or mixed gas with coal-formed gas from Carboniferous and Permian coal systems.But the Writer considers the gas is humic thermal-formed gas from the systems. The reasons are; ①The gas from Ordovician weathered zone belongs to coal-formed gas; ②The coal-systems of carboniferous and Permian are main source rocks; ③There are good pool-formed conditions of generating gas in Upper Palaeozoic and Storaging gas is Lower Palaeozoic. The gas prospective evaluation and ideas of selecting explorative area are proposed.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
1994年第3期1-4,共4页
Natural Gas Industry
关键词
鄂尔多斯盆地
天然气
油气勘探
Centre port of Eerduosi Basin, Ordovician, gas field, gas source research, CarboniferousPermian period,coal-formed gas, explorative direction.
