| 新集地区及外围煤层气构造-热演化模拟研究 |
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| 引用本文： | 席先武,彭格林,雷小青.新集地区及外围煤层气构造-热演化模拟研究[J].大地构造与成矿学,2001,25(3):321-328. |
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| 作者姓名： | 席先武 彭格林 雷小青 |
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| 作者单位： | 1. 中国科学院长沙大地构造研究所,
2. 西安塞舍尔石油勘探仪器有限公司 |
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| 基金项目： | 国家科技攻关项目，97-224-01-03-06， |
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| 摘 要： | 采用数值模拟的手段,反演了新集地区所在坳陷的沉积史和热演化过程,并研究它们与煤层气的关系。由此得出:新集地区煤系上覆厚度应在2600m左右,但到白垩纪末已被剥蚀殆尽;中生代以来共发生了三次热事件(240～220Ma、160～120Ma、80～60Ma),其中240～220Ma和160～120Ma的热事件对本区煤化作用和煤生气影响最大,奠定了本区煤层气的生储格局;然而长达160Ma的盖层剥蚀导致了本区热成因煤层气的大量逸散。
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| 关 键 词： | 煤层气 构造-热演化 模拟 新集地区 |
| 文章编号： | 1001-1552(2001)03-321-08 |
| 修稿时间： | 2001年2月28日 |
TECTONO-THERMAL NUMERICAL MODELLING OF COALBED METHANE IN XIN-JI AND ITS ADJACENT AREAS |
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| Abstract: | Both the sedimentary history and the tectono-thermal development of the Huainan depression have been numerically mo deled by BasinMod software,and whic h relationship to coalbed methane has been discussed.The modelling results indicated that the thickness of the coal series covering strata in Xin-ji and its adjacent areas should be 2600m while been completely denudated till Cretaceous era,and that there occurred three tectono-thermal events since the Mesozoic in the area,corre sponding to 240-220Ma,160-120Ma an d 80-60Ma,respectively.The two events at a ge of 240-220Ma and of 160-120Ma,whi ch were contributed to coalification and co al gas generation,dominantly contr olled the basic pattern of coal-gas generation and reposition in Xin-ji and its adjacent areas.Additionally,the long-ter-med erosion of coal series covering s trata(up to 160Ma )induced the large emission of the thermo-genesis coal -gas in the area. |
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| Keywords: | Coalbed methane tectono-thermal evolution numerical modeling Xin-ji |
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