鄂尔多斯盆地杭锦旗探区上古生界天然气成藏机理

ACCUMULATION MECHANISM OF NATURAL GAS IN UPPER PALEOZOIC, HANGJINQI BLOCK, NORTH ORDOS BASIN

薛会 王毅 徐波

Xue Hui Wang Yi Xu Bo

中国石油化工股份有限公司, 石油勘探开发研究院, 北京, 100083 2. 中国石油大学, 北京, 102249 3. 中国地质大学, 能源学院, 北京, 100083

Research Institute of Petroleum Exploration and Production, SINOPEC, Beijing 100083, China 2. China University of Petroleum, Beijing 102249, China 3. School of Energy Resources, China University of Geosciences, Beijing 100083, China

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。

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.

国家自然科学基金(40472073)

https://doi.org/10.11781/sysydz200906551