吉林大学学报(地球科学版) ›› 2018, Vol. 48 ›› Issue (1): 39-52.doi: 10.13278/j.cnki.jjuese.20160278
李志明1,2,3,4, 张隽1,2,3,4, 鲍云杰1,2,3,4, 曹婷婷1,2,3,4, 徐二社1,2,3,4, 芮晓庆1,2,3,4, 陈红宇1,2,3,4, 杨琦1,2,3,4, 张庆珍1,2,3,4
Li Zhiming1,2,3,4, Zhang Jun1,2,3,4, Bao Yunjie1,2,3,4, Cao Tingting1,2,3,4, Xu Ershe1,2,3,4, Rui Xiaoqing1,2,3,4, Chen Hongyu1,2,3,4, Yang Qi1,2,3,4, Zhang Qingzhen1,2,3,4
摘要: 以沾化凹陷渤南洼陷罗63井和义21井沙一段取心段为例,依据研究样品的热解、全岩与黏土矿物X射线衍射、有机岩石学、孔隙度、氩离子抛光+扫描电镜以及微孔隙结构等分析结果,开展了沙一段湖相富有机质烃源岩岩石学与孔隙结构特征研究,结果表明:罗63井和义21井沙一段取心段富有机质烃源岩主要由碳酸盐矿物、黏土矿物和石英组成,另含少量长石、黄铁矿和石膏,其中黏土矿物主要由伊/蒙混层、伊利石组成,由取心段顶部至底部,碳酸盐矿物质量分数明显增高,而黏土矿物和石英则显著降低,呈现由钙质或灰质泥岩至演变为泥质灰岩的特征,岩石构造类型包括层状、纹层状和块状3类;罗63井和义21井沙一段取心段富有机质烃源岩平均孔隙度分别为2.09%和4.43%,具纹层状构造的烃源岩具有相对高的孔隙度;主要发育矿物基质孔隙(即粒间孔隙和粒内孔隙)和裂缝型孔隙两大类,而有机质孔隙不发育,孔隙半径从十几微米至几纳米的孔隙均有分布,以发育孔径50 nm以上的宏孔为主。
中图分类号:
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