柴达木盆地红沟子油砂矿储层特征及成因探讨
发布时间：2019-07-10 16:44
【摘要】：以野外露头、录井描述、岩心、地震资料为基础,利用普通薄片、荧光薄片、分析化验等方法,研究了柴达木盆地红沟子油砂矿的储层特征和成矿因素。结果表明:红沟子油砂矿出露于红沟子构造高点,沿着背斜两翼分布,发育层位为新近系上油砂山组(N_2~1)和下油砂山组(N_2~2);红沟子油砂矿的岩性主要为岩屑长石砂岩和长石岩屑砂岩,石英、长石、岩屑含量为Q38F32R30,整体成熟度较低;储层物性整体随着深度变大而变差,孔隙度为3.10%~38.90%,平均为22.70%,渗透率为0.1×10~(-3)~10.0×10~(-3)μm~2,综合评价为中孔、低渗储层;油砂的含油率随着孔隙度、渗透率的增加而增加,含油率为0.12%~15.55%,平均为2.51%;充足而持续的烃源供给、优质的储层、有效的盖层封闭、盆地高寒缺氧的古气候环境、良好的运移通道和较晚的构造抬升是红沟子油砂成矿的必要因素;孔隙度大于25.00%、渗透率大于1.0×10~(-3)μm~2、砂泥互层配置良好、泥岩层较厚、靠近背斜核部的区域是今后的勘探优选目标。该研究为柴达木盆地西部油砂资源的下步勘探开发提供了依据。
[Abstract]:Based on the field outcrop, logging description, core and seismic data, the reservoir characteristics and metallogenic factors of Honggouzi oil sand deposit in Chaidamu Basin are studied by using ordinary thin slices, fluorescent flakes and analytical and laboratory methods. The results show that the Honggouzi oil sand deposit is exposed to the high point of Honggouzi structure and distributes along the two wings of anticlinal. The developed strata are Neogene Upper Youshashan formation (N 鈮，
本文编号：2512739
[Abstract]:Based on the field outcrop, logging description, core and seismic data, the reservoir characteristics and metallogenic factors of Honggouzi oil sand deposit in Chaidamu Basin are studied by using ordinary thin slices, fluorescent flakes and analytical and laboratory methods. The results show that the Honggouzi oil sand deposit is exposed to the high point of Honggouzi structure and distributes along the two wings of anticlinal. The developed strata are Neogene Upper Youshashan formation (N 鈮，
本文编号：2512739
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