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This paper makes an approach to the characteristics of the compound and carbon iso-topic composition of condensate in the Sichuan, Shaanxi-Gansu-Ningxia, Dongpu and Jiyangbasins in China. The results we have obtained show that the compound properties are re-lated to the maturity. The Paraffin Index Ⅰ and the Saturated-Aromatic Index (SAI) increasegradually from the immature to mature (or over mature) condensate. and the SAI valueincrease from 2 to more than 30. The carbonisotopic composition of condensate is control-led by the type of parent matter. If the oil and condensate come from the same source rock,they will have similar carbon isotopic composition. In the same region there is an obviousdifference in carbon isotopic composition between the condensate generated from coal-bear-ing strata and that from oil-source rocks. The difference can be regarded as a parameter fordistinguishing the coal-type gas from the oil-type gas. In the same basin the carbon isotop-ic composition of the natural gas-oil-co 相似文献
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从苏北、南松辽、广东三水等含油气盆地采集了15个气样,测定了氦、氩、氮同位素和CO_2的碳同位素以及甲烷碳、氢同位素。结合气体组份资料和采集区地质背景,着重讨论了非烃气体的成因和稀有气体的地球化学特征,并应用了四川、新疆、甘肃窑街煤矿等资料进行了对比。研究表明:烃类气体和非烃类气体虽储于同一储层,但在成因上常有不同。从南松辽万金塔到苏北黄桥、广东三水这三个处于华夏裂谷系地区的二氧化碳气藏及其中的氦与幔源有关,CO_2部分也可能与幔源岩浆活动有关;壳源氦与壳源氩相似,具有年代积累效应。 相似文献
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CHARACTERISTICS OF ISOTOPE COMPOSITION OF GASIFORM HYDROCARBON AND IDENTIFICATION OF COAL-TYPE GAS 总被引:2,自引:0,他引:2
The natural gas which forms in the course of the formation of coal in the coal-series stra-ta is called the coal-type gas. It is an important genetic type of combustible gas. This papertakes the isotope composition of carbon and hydrogen as a key factor to make an approachto the identification of the coal-type gas and the oil-type gas. According to the isotope com-position of methane carbon and hydrogen, we have divided the natural gases in differentplaces into biogas, coal gas, oil-type gas and coal-type gas. There is a mixed gas area bet-ween the coal-type gas and the oil-type gas. The conditions for the formation of the areaare comparatively complex. The overmature oil-type gas overlies the coal-type gas in distri-bution. According to our studies on oil-gas areas in the Sichuan basin and Eerdos basin,we come to know that the coal-type gas in these basins has an isotope composition of highercarbon. Its mathematic expression of δ~(13)C_1-R_0 is δ~(13)C_1‰ = 8.641 lgR_0-32. 8, representing a mod-el o 相似文献
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利用单粒子理论和电子与光子非弹性碰撞模型,对激光-电子非线性康普顿散射的电子的速度进行了研究.通过理论推导得出了电子的能量变化因子的表达式,同时讨论了电子与光子碰撞后的速度.结果表明,电子与光子碰撞后的速度不仅与碰撞之前电子的速度和n光子集团的频率有关,还与电子与n光子集团入射方向与散射方向间的夹角和光子的散射角有关. 相似文献