青藏高原多年冻土区天然气水合物成藏条件
Study on Accumulation Conditions of Natural Gas Hydrate in Permafrost Regions of Qinghai-Tibet Plateau
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- 引用格式:
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李伟华,陈永峤.青藏高原多年冻土区天然气水合物成藏条件[J].天然气与石油,2011,29(2):0.doi:
.Study on Accumulation Conditions of Natural Gas Hydrate in Permafrost Regions of Qinghai-Tibet Plateau[J].Natural Gas and Oil,2011,29(2):0.doi:
- DOI:
- 作者:
- 李伟华12，陈永峤12
- 作者单位:
- 1.长江大学“油气资源与勘探技术”教育部重点实验室 2.长江大学地球化学系
- 关键词:
- 天然气水合物；青藏高原；多年冻土区；成藏条件
Natural gas hydrate； Qinghai-Tibet Plateau； Permafrost region； Accumulation condition
- 摘要:
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天然气水合物是一种绿色能源，具有广阔的开发利用前景。青藏高原多年冻土大面积分布，中新生代盆地数量众多，盆地内烃源岩发育，为天然气水合物的形成提供了良好的条件。主要从物质条件、环境条件、热力学条件、地质条件等方面来探讨青藏高原多年冻土区天然气水合物的成藏条件。分析认为青藏高原地层中丰富的有机质及其较高的成熟度是成藏的物质条件，低温、高压、冻土厚度大、地温梯度小等是保证其成藏的环境和热力学条件，大量的运移通道、较好的圈闭是其成藏的有利地质条件。预测了青藏高原多年冻土区天然气水合物有利的找矿前景区。
Natural gas hydrate is a kind of environment-friendly energy and has a broad development and utilization prospect. Qinghai-Tibet Plateau has a large area distribution of permafrost， numerous mesozoic and cenozoic basins and there are many developed hydrocarbon source rocks in the basins， which provides good conditions for natural gas hydrate formation. Investigated are such accumulation conditions of natural gas hydrate formation in permafrost regions of Qinghai-Tibet Plateau as physical conditions， environmental conditions， thermodynamics conditions and geological conditions and it is considered after the investigation that the organic matters rich in Qinghai-Tibet Plateau stratum and their high maturity are physical conditions of natural gas hydrate accumulation， low temperature， high pressure， large frozen thickness， small temperature gradient， etc. are environmental conditions and thermodynamics conditions for ensuring its accumulation and a lot of migration channels and good entrapment are favorable geological conditions for its accumulation.
