| 鉴别煤成气和油型气若干指标的初步探讨 |
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| 引用本文： | 戴金星,戚厚发,宋岩.鉴别煤成气和油型气若干指标的初步探讨[J].石油学报,1985,6(2):31-38. |
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| 作者姓名： | 戴金星 戚厚发 宋岩 |
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| 作者单位： | 北京石油勘探开发科学研究院 |
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| 摘 要： | 鉴别煤成气和油型气的普遍性标志初步认为有:1.煤成气的甲烷碳同位素(δ13C1)一般比油型气的重:在Ro≤0.5%,煤成气和油型气δ13C1除-55‰至-74‰是重迭数域值外,当δ13C1<-74‰为油型气型生物成因气;在Ro>0.5%至-2.5%时,δ13C1-43‰至-30‰是煤成气与油型气重迭数域值,故δ13C1≤-43‰至-55‰的气是油型气;而δ13C1>-30‰的气是煤成气。2.煤成气中的汞蒸气比油型气的一般含量高。煤成气中平均汞含量一般在700毫微克/米3以上,多数大于1000毫微克/米3,而油型气中平均汞含量在600毫微克/米3以下,多数小于400毫微克/米3;煤成气中最高含汞量一般大于1000毫微克/米3,而油型气中的一般小于700毫微克/米3。3.当Ro为0.4%至1.35%时,一个含油层系形成以气为主以油为辅,这种气是煤成气。4.在与Ro0.4%至1.0%有成因关系的气中,若普遍见到凝析油,这种气是煤成气。
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| 关 键 词： | 煤成气 油型气 凝析油 初步探讨 毫微克 甲烷碳同位素 生物成因气 四川盆地 天然气 鄂尔多斯盆地 |
| 收稿时间： | 1984-02-29 |
ON THE INDICATORS FOR IDENTIFYING GAS FROM OIL AND GAS FROM COAL MEASURE |
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| Dai Jinxing,Qi Houfa,Sung Yen.ON THE INDICATORS FOR IDENTIFYING GAS FROM OIL AND GAS FROM COAL MEASURE[J].Acta Petrolei Sinica,1985,6(2):31-38. |
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| Authors: | Dai Jinxing Qi Houfa Sung Yen |
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| Affiliation: | Scientific Research Institute of Petroleum Exploration and Development Beijing |
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| Abstract: | Four indicators have been mentioned for identifying gas from oil and gas from coal measure. (1)the carbon isotope of methane (σ~(13)C_1)in gas from coal measure is generally heavier than that from oil; (2) the content of mercury vaor in gas from coal measure is higher than that from oil; (3) in a basin or formation with Ro ranging 0.4 to 1.35% producing primarily gas and only a small amount of associated oil, the gas is from coal measure; and(4) if condensate oil is observed in the gas from a formation with Ro ranging 0.4 to 1.0%, the gas is from coal measure. Examples have been cited for illustrative purpose. |
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