| 海拉尔盆地呼和湖凹陷致密砂岩气成藏特征 |
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| 引用本文： | 刘志文.海拉尔盆地呼和湖凹陷致密砂岩气成藏特征[J].世界地质,2016,35(3):831-839. |
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| 作者姓名： | 刘志文 |
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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，黑龙江 大庆 163712 |
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| 摘 要： | 海拉尔盆地呼和湖凹陷具备形成大面积致密砂岩气藏的地质条件,其断陷期地形比较宽缓,后期改造弱,主要发育低幅度的断背斜或宽缓的向斜,在局部具备稳定的构造条件。南二段煤系源岩广泛发育,丰度均达到中等--好烃源岩级别,为致密砂岩气藏的形成提供了充足的物质基础。洼槽区南二段储层属低孔--特低渗型储集层。南二段致密储层与煤、泥岩呈频繁互层状分布,形成致密砂岩气有利的的生储盖组合。构造高部位在一定程度上控制油气丰度,稳定的负向构造区有利于寻找储层富集区。呼和湖凹陷致密砂岩气主要表现为两种成藏组合,自生自储型和内生外储型,油气呈南北向条带状分布。
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| 关 键 词： | 呼和湖凹陷 致密砂岩气 成藏特征 海拉尔盆地 |
Accumulation characteristics of tight sandstone gas in Huhehu depression of Hailaer Basin |
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| LIU Zhi-Wen.Accumulation characteristics of tight sandstone gas in Huhehu depression of Hailaer Basin[J].World Geology,2016,35(3):831-839. |
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| Authors: | LIU Zhi-Wen |
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| Institution: | Exploration and Development Research Institute of Daqing Oilfield Company Ltd． ，Daqing 163712，Heilongjiang，China |
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| Abstract: | Huhehu depression of Hailaer Basin has suitable geologic conditions for forming large- area tight sandstone gas reservoir． The terrain in rifted period is wide and gentle，and later tectonic reworking is weak． It mainly developed low- amplitude anticline or wide gentle syncline，with locally stable tectonic conditions． Coal source rocks of K 1 n 2 strata are widely developed，the abundance of organic matter is in medium- good level，which provides good material conditions for forming tight sandstone gas reservoir． The reservoirs in subsag of K 1 n 2 strata is low in porosity and special low in permeability． The reservoir rocks of K 1 n 2 strata are frequently interbedded with coal and mudstone，which is favorable for inter- source gas accumulation in the tight sandstone reservoir． Tectonic high part controls the oil and gas abundance in some degree，and the stable negative reservoir structural zone is conducive to looking for enrichment region． Tight sandstone gas reservoir is mainly in two combinations，including self- generated and self- storage type，and endogenous external storage type; and oil and gas are distributed in band in NS direction． |
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| Keywords: | Huhehu depression tight sandstone gas accumulation characteristics Hailaer Basin |
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