天然气地球科学 ›› 2021, Vol. 32 ›› Issue (6): 794805.doi: 10.11764/j.issn.1672-1926.2021.04.011
林怡(),陈聪,徐诗雨,杨帆,曾乙洋,黎洋,赵春妮,杨京,何开来
Yi LIN(),Cong CHEN,Shi-yu XU,Fan YANG,Yi-yang ZENG,Yang LI,Chun-ni ZHAO,Jing YANG,Kai-lai HE
摘要:
近期川西北部泥盆系ST3、ST10井相继获气,展示出区内泥盆系观雾山组具有较大的勘探潜力。但目前对观雾山组储层特征和成因认识不清,为进一步推动川西北部泥盆系观雾山组超深层海相碳酸盐岩勘探进程,以野外露头和岩心为研究对象,通过开展岩心观察、薄片鉴定、微量元素测试及同位素研究等方法对储层特征及形成机制进行研究。结果表明,川西北部泥盆系观雾山组发育一套以生屑白云岩和角砾白云岩为主的碳酸盐岩储层,储集空间主要以溶蚀孔洞为主,物性分析数据呈低孔、特低渗储层特征。综合分析认为,观雾山组储层是多种因素耦合作用的结果,其中滩相沉积环境是储层形成的基础,同生期的白云石化作用以及多期岩溶改造是储层形成的主控因素。
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