青海省天峻县木里地区天然气水合物微生物地球化学检测法（MGCE）试验

以木里煤田天然气水合物发现区为正演模型，探索和研究微生物地球化学检测法（MGCE）对于陆域天然气水合物勘查的实用性与可靠性。冻土带地表土壤中专性微生物含量异常与地下天然气水合物丰度具有良好的关联性，因而能灵敏而有效地预测天然气水合物的富集带。探区内天然气水合物具有以热成因气为主、生物气为辅的混合气源特征。试验成果表明，在青藏高原冻土带天然气水合物和油气资源勘查中，灵敏、快捷、经济而有效的微生物地球化学检测法（MGCE）将会有广阔的应用前景。关键词：冻土带；天然气水合物；微生物地球化学检测法（MGCE）；试验；木里地区

Mei B W, Wu M, Sun Z J, Yang Z B, Zhu Y H, Lu Z Q, Lin R Z, Mei H. Microbial geochemical （MGCE） detection test of natural gas hydrate in permafrost of Muli area, Tianjun County, Qinghai Province. Geological Bulletin of China, 2011, 30 （12）：1891-1895

The gas hydrate-discovering well in the Muli coalfield was chosen as the analog model in this test to study the applicability and reliability of the microbial geochemical （MGCE） detection method in exploring onshore natural gas deposits. A positive correlation was detected between the surface soil microbial anomaly of the permafrost zone and the abundance of the subsurface gas hydrate de- posit. Therefore, this method could sensitively and effectively predict the distribution of gas hydrate accumulations. In the exploration block, a rmxed gas source was detected. The gas is dominantly thermogenic and subordinately of biogas source. The result of the test proves that the microbial geochemical exploration method is a sensitive, fast and cost-effective technique for exploring gas hydrate and petroleum reservoirs in Tibetan Plateau pem~afrost region and therefore could be widely employed in this region.