录井工程 ›› 2023, Vol. 34 ›› Issue (1): 99-106.doi: 10.3969/j.issn.1672-9803.2023.01.016
金宝强, 陈建波, 邓猛, 缪飞飞, 舒晓
JIN Baoqiang, CHEN Jianbo, DENG Meng, MIAO Feifei, SHU Xiao
摘要: 为解决渤海BZ油田沙河街组低渗油藏储层成因机理不明确及成岩作用定量化表征难的问题,利用岩心、岩石铸体薄片及扫描电镜等分析资料,对该油田沙河街组岩石学特征、储集空间、成岩作用、演化特征、演化阶段的定量表征进行了研究。结果表明:沙河街组储层岩石类型以岩屑长石砂岩为主,其中沙二段储层粒度分选、颗粒接触关系和储集空间类型均优于沙三段;沉积过程中主要发育机械压实及压溶、胶结和溶蚀等成岩作用,整体处于中成岩阶段A 2亚期,局部区域达到中成岩阶段B亚期;孔隙度演化分析表明,机械压实作用是沙河街组储层低渗的主要成因,在储层孔隙度损失过程中作用最大,其中沙三段相比沙二段机械压实作用更加明显,胶结和溶蚀作用对储层孔隙度损失和增加的影响基本相当。
中图分类号:
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