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首页> 外文期刊>Chinese science bulletin >Kinetic modeling the effects of primary migration, diffusion and waterwashing on Upper Paleozoic coal-derived gas at the center of Ordos Basin
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Kinetic modeling the effects of primary migration, diffusion and waterwashing on Upper Paleozoic coal-derived gas at the center of Ordos Basin

机译：一次运移，扩散和水洗对鄂尔多斯盆地中心上古生界煤成气的影响的动力学模型

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摘要

Gold reactor pyrolysis system is used to model the gas formation from the Upper Paleozoic coal measures and the results show coal-derived gas characterized with δ~(13)C_1 of-33.46per thousand, δ~(13)C_2 of-23.1per thousand, dryness(C_1/C_(1-4)) 85.6%. And then, effects of the post-genetic processes on coal- derived gas are analyzed in turn: (ⅰ) About 27% coal-derived gases constituted with more methane are calculated to be lost during diffusion. The residual in reservoir are characterized with almost the same compositions as the original, which suggests faint influence by diffusion (the residual, δ~(13)C_1 of -32.78per thousand, δ~(13)C_2 of-23.1per thousand, C_1/C_(1_4) 83%); (ⅱ) Water washing made about 8% coal-formed gases lost and their components and stable carbon isotopes are stable; (ⅲ) In the final, it is speculated that primary migration makes much more wet gas (C_(2—4)) leave in coal measures. The variance of gas dryness induced by this factor is estimated to be about 10%.
机译：用金反应器热解系统模拟了上古生界煤层气的形成，结果表明衍生自煤的天然气的δ〜（13）C_1为-33.46 /千，δ〜（13）C_2为-23.1 /千，干燥度（C_1 / C_（1-4））85.6％。然后，依次分析后成因过程对煤衍生气的影响：（ⅰ）计算得出，约有27％的煤衍生气中甲烷含量较高，在扩散过程中会损失掉。储层中的残余物具有与原始残余物几乎相同的成分，这表明扩散影响微弱（残余物，δ〜（13）C_1为-32.78 /千，δ〜（13）C_2为-23.1 /千，C_1 / C_（1_4）83％）； （ⅱ）水洗损失了约8％的煤形成气，其成分和稳定的碳同位素稳定； （ⅲ）最后，据推测，一次运移会使煤层中的湿气（C_（2-4））更多。由该因素引起的气体干燥度的变化估计为约10％。

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