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| 1 | 塔里木盆地海相原油汞同位素组成特征显示文摘原油中普遍赋存汞,汞可能为油气成因与来源提供信息。研究了塔里木盆地海相原油中汞含量及汞同位素组成特征,揭示了原油与藻类等低等生物中汞同位素组成特征的相关性。塔里木盆地海相原油中汞含量变化范围为0.71~23.70μg/kg,均值为(4.00±5.53)μg/kg(n=28,1SD,即1倍标准偏差)。原油中汞同位素非质量分馏(Δ^(199)Hg)大多为正值,分布范围为-0.07‰~0.19‰,均值为0.03‰±0.07‰(n=17,1SD),质量分馏(δ^(202)Hg)均为负值,分布范围为-2.44‰~-0.42‰,均值为-1.43‰±0.64‰(n=17,1SD),推测塔里木盆地海相原油中汞同位素组成主要继承了藻类等低等生物,藻类可能是塔里木盆地海相油气的主要生油有机质。 | 朱光有 张怀顺 汤顺林 孙广义 丁玉祥 | 2021 | 天然气地球科学2021，32，3： | 2 |
| 2 | Distribution and genesis of mercury in natural gas of large coal derived gas fields in China显示文摘The mercury content in natural gas samples from more than 500 gas wells in eight large gas bearing basins of China was tested, mercury release experiments on two coal samples from different areas were conducted, and the mercury content of 11 coal samples from different gas wells of Ordos Basin was tested. The mercury distribution of the coal derived gas has three features: The first is that mercury content of coal derived gas is generally much higher than that of oil derived gas, the second is that the coal derived gases from different fields vary widely in mercury content, the third is that the mercury content in coal derived gas increases with the increase of production layer depth. Mercury in coal derived natural gas mainly originates from the source rock. Besides three evidences, namely, coal derived gas mercury content is much higher than that of oil derived gas, mercury content of gas with high carbon dioxide content decreases with the increase of carbon dioxide content, and the coal bearing strata have the material base to generate natural gas with high mercury content, the pyrolysis experiment of two coal samples show that coal can produce natural gas with high mercury content during the process of thermal evolution. The mercury content of coal derived natural gas is controlled mainly by the temperature of source rock and the sulfur environment of reservoir. According to lithospheric material cycling process and oil-gas formation process, the formation of mercury in coal derived gas can be divided into four stages, transportation and deposition, shallow burial, deep burial, and preservation and destruction. | LI Jian HAN Zhongxi YAN Qituan WANG Shuying GE Shouguo | 2019 | Petroleum Exploration and Development2019，46，3： | 0 |
| 3 | Source and distribution of mercury in natural gas of major petroliferous basins in China显示文摘Based on the analysis of the natural gas samples of 146 wells from four major petroliferous basins of China,the source and distribution of mercury in natural gas in major petroliferous basins of China were identified.Studies have shown that the mercury concentration of natural gas in petroliferous basins of China varies widely,ranging from 0.01 to 4050μg/m^3.The gas well with the highest mercury concentration is in the Xushen gas field in the Songliao Basin.The mercury concentration in the craton basin is relatively low,and the secondary gas reservoir in the Tarim Basin has the lowest mercury concentration.In the rift basin,due to the presence of deep faults which cut the basement and mixing effects of deep fluids,the mercury concentration in natural gas may be abnormally high,e.g.the Xushen gas field in the Songliao Basin.In relatively stable basins where deep and large faults do not develop,mercury is primarily of organic origin.In rift basins where deep fluids are mixed with gas reservoirs,mercury in natural gas may mainly come from the deep fluids and is characterized by abnormally high mercury concentration and R/Ra values. | Quanyou LIU Weilong PENG Jian LI Xiaoqi WU | 2020 | Science China Earth Sciences2020，63，5： | 0 |
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