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Alternative TitleRelationship Between Gas-Bearing Fluids Migration and Accumulation of Natural Gas Hydrate
张金华1,2; 苏明3; 魏伟2; 吴能友4; 刘杰3; 杨睿3; 沙志彬5; 丛晓荣3
Source Publication地质科技情报
Other AbstractGas-bearing fluids migration, mainly including fluid migration pattern, migration pathway, and migration efficiency, is one of the important factors affecting natural gas hydrate accumulation. Based on the progress of global marine gas hydrate explorations and researches, focusing on gas-bearing fluids mi- gration, we mainly summarize several migration pathways, such as diapir structure, fault/fracture and permeable layer to understand their effect or impact on the formation and distribution of gas hydrate. Re- search results show that fluid convection is an effective migration pattern, which is beneficial for the hy- drocarbon gas accumulation and gas hydrate formation and concentration. Almost all known-natural gas hydrate occurrence zones develop multi-type migration pathways, not single-type pathway, and individual hydrate occurrence is commonly affected by various gas-bearing fluids migration pathways. In terms of pathway types, diapir structures, fault/fractures and permeable layers all belong to focused high-flux mi- gration pathway, conductive for hydrate formation and accumulation. However this focused high-flux mi- gration pathway type does not mean the existence of high saturation and enrichment of gas hydrate. The focused high-flux migration pathway does not have a one-to-one correlation with high saturation and en- richment of gas hydrate. As high saturation and enrichment of gas hydrate is still closely related to migra- tion efficiency. Therefore, it is necessary to analyze the gas-bearing fluids migration in key hydrate occur- rence areas, and then reveal the distribution of fluid migration pathways and the size of migration flux. With these analyses, the predictions and descriptions of hydrates would be more accurate, and they could also be reasons for site selections of marine gas hydrates.
Keyword天然气水合物 含气流体运移 运移通道 断层及裂隙 natural gas hydrate gas-bearing fluids migration migration pathway fault/fracture
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Document Type期刊论文
Corresponding Author苏明
Recommended Citation
GB/T 7714
张金华,苏明,魏伟,等. 含气流体运移与天然气水合物成藏[J]. 地质科技情报,2017,36(2):176-185.
APA 张金华.,苏明.,魏伟.,吴能友.,刘杰.,...&丛晓荣.(2017).含气流体运移与天然气水合物成藏.地质科技情报,36(2),176-185.
MLA 张金华,et al."含气流体运移与天然气水合物成藏".地质科技情报 36.2(2017):176-185.
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