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海拉尔盆地呼南地区凝析气藏成藏地质条件*
GEOLOGICAL CONDITIONS OF FORMING CONDENSATE GAS RESERVOIR IN SOUTHERN HUH LAKE DEPRESSION, HAILAR BASIN
陈鸿平
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作者单位:大庆油田有限责任公司勘探开发研究院
中文关键字:海拉尔盆地 呼南地区 煤系地层 凝析气藏 成藏条件 有利勘探区
英文关键字: Hailar Basin, southern Huh Lake Depression, coal-bearing strata, condensate gas reservoir, reservoir-forming condition, favorable exploration regi
中文摘要:  凝析气藏是近年来海拉尔盆地油气勘探发现的新类型,主要分布在呼和湖凹陷南二段煤系地层中。本文深入分析呼南地区南二段凝析气藏的性质的气场条件,明确呼南地区凝析气藏主要属于中等-高含凝析油气藏,天然气为凝析油伴生和煤型气混合气,主要来源于南二段煤系烃源岩。指出高丰度,广泛分布,成熟的煤系源岩是凝析气藏形成的内在因素,温压系统是凝析气藏形成的外在因素,优质储层控制凝析气藏富集高产,巨厚的大一段泥岩为凝析气藏形成提供了较好的封盖条件。在凝析气藏成藏条件分析的基础上,指出缓坡带及陡坡带邻近洼槽的区域是下一步寻找凝析气藏的有利勘探靶区。 
英文摘要: Condensate gas reservoir is a new reservoir type discovered during an exploration and development of Hailar Basin. This kind of reservoir is mainly distributed in coal-bearing strata of K1n2, Huh Lake Depression. Here, the K1n2 condensate gas reservoirs were analyzed in detail. Results show that (1) in southern Huh Lake Depression, the reservoirs belong to a kind of gas reservoir with middle to high content of condensate; (2) natural gas in these reservoirs, as a kind of compound gas including condensate associated gas and coal-related gas, is mainly originated from the coal-bearing source rock of K1n2; (3) the mature coal-related source rock with high abundance and wide distribution is an interior factor to form these condensate gas reservoirs whereas the temperature-pressure system is an exterior one; (4) whether they have high accumulation and yield or not is affected by high-quality reservoir, and K1d1 mudstone with large thickness may provide a better sealing condition. Moreover, after the research on reservoir-forming geological conditions, it is pointed that both gentle- and steep-slope belts which are adjacent to this depression trough are favorable targets. 

  

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国内统一连续出版物号:CN51-1159/TE |国内发行代码: |国际标准出版物号:ISSN1673-3177 |国际发行代码:
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