| 中国大型气田形成的主要条件及潜在勘探领域 |
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| 引用本文： | 宋岩,柳少波.中国大型气田形成的主要条件及潜在勘探领域[J].地学前缘,2008,15(2):109-119. |
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| 作者姓名： | 宋岩 柳少波 |
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| 作者单位： | 1. 中国石油勘探开发研究院,北京,100083;长江大学,湖北,荆州,434023
2. 中国石油勘探开发研究院,北京,100083 |
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| 摘 要： | 20世纪90年代以来,中国天然气工业进入了快速发展的阶段。天然气探明地质储量和天然气产量的高速增长主要依赖于大、中型气田的发现,全国天然气探明地质储量和探明可采储量的89%主要分布于地质储量大于100×108m3的大、中型气田中。近年来很多新领域天然气勘探取得了重大进展,文中通过总结中国大、中型气田的地质特点和形成条件,提出中国大、中型气田的形成主要受控于四大因素:(1)煤成气和油型气是中国主要的天然气成因类型,煤系和高过成熟海相烃源岩是大、中型气田形成的气源基础;(2)大面积分布的孔隙型储层是天然气的主要储集类型,包括大型河流三角洲砂体、大面积礁滩型灰岩、风化壳型碳酸盐岩、溶蚀白云岩、火山岩等;(3)煤系及膏泥岩是大、中型气田保存的优质区域盖层;(4)前陆盆地大型构造圈闭和克拉通盆地、断陷盆地大面积岩性圈闭是大、中型气田聚集的关键。未来天然气勘探领域主要是前陆盆地、克拉通盆地大型海相碳酸盐岩和河流-三角洲砂岩岩性体、东部断陷盆地的深层、东海和南海海域。
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| 关 键 词： | 天然气 大、中型气田 主控因素 勘探领域 |
| 文章编号： | 1005-2321(2008)02-0109-11 |
| 修稿时间： | 2007年11月20 |
Main conditions for formation of middle-large gas fields and the potential gas exploration areas in China |
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| Song Yan,Liu Shaobo.Main conditions for formation of middle-large gas fields and the potential gas exploration areas in China[J].Earth Science Frontiers,2008,15(2):109-119. |
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| Authors: | Song Yan Liu Shaobo |
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| Abstract: | Chinese natural gas industry has stepped into a rapidly developing stage since 1990s.High increasing of proved gas reserves and gas production depends on the discovery of middle-large gas fields.The proved gas reserve of middle-large gas fields which is above 100×108m3 accounts for 89% of all the cumulative proved reserves.On the basis of great exploration progress achieved in recent years,four main factors controlling the formation of middle-large gas fields are put forward:(1) coal derived gas and oil type gas are the two main genetic gas types in China,and coal measures and high to over matured marine source rocks control the gas generation;(2) widely distributed porous type reservoirs are the main reservoirs of middle-large gas fields,which include large fluvial delta sandstone,reef flat carbonate,weathered crust carbonate,corroded dolomite,volcanic rocks,etc.;(3) coal measures and evaporate are main seal rocks controlling gas preservation;(4) large structural traps in foreland basins,and wide-area subtle traps in craton basins and rift basins control the gas accumulation in middle-large gas fields.The potential gas exploration fields include foreland basins,carbonate and subtle traps in craton basins,and deep reservoirs in rift basins in East China,East China Sea and South China Sea. |
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| Keywords: | natural gas middle-large gas field main controlling factor exploration area |
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