岩性油气藏 ›› 2021, Vol. 33 ›› Issue (1): 99108.doi: 10.12108/yxyqc.20210110
杨凡凡1,2, 姚宗全1,2, 杨帆3, 德勒恰提·加娜塔依1,2, 张磊4, 曹天儒1,2
YANG Fanfan1,2, YAO Zongquan1,2, YANG Fan3, DELECHIATI Ganatayi1,2, ZHANG Lei4, CAO Tianru1,2
摘要: 准噶尔盆地玛北地区三叠系百口泉组储层非均质性较强,多因素综合分析成为近年来精细储层研究的重要手段。通过岩心、铸体薄片、测井曲线、粒度等资料,开展综合储层沉积微相、成岩相和裂缝相特征的岩石物理相研究,并对所划分的岩石物理相进行聚类分析,开展对研究区有利储层的预测。结果表明:①扇三角洲沉积微相主要发育分流河道、辫状分支水道、水下分流河道及水下分流间湾等4种微相;②成岩相包括3种致密化成岩相(压实致密成岩相、伊/蒙充填成岩相和硅质胶结成岩相)和2种扩容性成岩相(绿泥石衬边弱溶蚀成岩相和不稳定组分溶蚀成岩相);③在平缓斜坡背景下,由于局部发育水平缝,裂缝密度小于1条/m,对储层物性影响较小;④遵循“沉积微相+成岩相+裂缝相”叠合原则,厘定了岩石物理相的分类,划分出了水下分流河道-绿泥石衬边弱溶蚀成岩相等10种岩石物理相;⑤PF1对应Ⅰ类储层,物性最好,主要发育在百二段,百三段发育规模较小;PF2对应Ⅱ类储层,物性中等,在百口泉组储层中相对较发育;PF3对应Ⅲ类储层,物性相对较差,在百三段较为发育。玛北地区岩石物理相的研究方法,可以为百口泉组油气扩边勘探提供指导。
中图分类号:
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