【摘要】 多类型天然气共生现象在越来越多的盆地中被发现,并已引起广大学者的注意。但是我国对于多类型天然气共生研究重视不够,更多地集中于单一类型天然气研究。以鄂北杭锦旗探区为例,展开多类型天然气研究。研究表明杭锦旗探区上古生界具备发育多类型天然气藏的地质条件,煤层气、根缘气(深盆气)、常规气共同发育。3种不同类型天然气在成藏机理上具有递变关系,从吸附机理过渡至活塞式、置换式运聚机理,在空间上依次形成了煤层气藏、根缘气藏(深盆气藏)及常规气藏,构成了杭锦旗探区上古生界天然气成藏机理序列。从实际勘探角度而言,仅根缘气藏(深盆气藏)和常规气藏具有工业勘探价值。更多还原

【Abstract】 The phenomenon of multi-types of natural gas generating together has been found in more and more basins.Lots of researchers have paid much more attention to this phenomenon.However,researches on multi-types of natural gas generating together have not attracted enough attention in China.Most researchers only focus on single gas.Researchers on multi-types of natural gas have been carried out in the Hangjinqi block of North Ordos Basin,indicating that the Upper Paleozoic in the block is suitable for generation of multi-types of natural gas.Coal-bed methane,source-contacting gas(deep basin gas) and conventional gas generate together in the block.Accumulation mechanism of 3 different types of gas reservoir transfer from absorption to piston and replacement mechanism.Coal-bed methane,source-contacting gas(deep basin gas) and conventional gas reservoirs generate in turn in space,forming accumulation mechanism spectrum.In actual exploration,only source-contacting gas(deep basin gas) and conventional gas reservoirs have commercial value.更多还原