岩性油气藏 ›› 2015, Vol. 27 ›› Issue (5): 108115.doi: 10.3969/j.issn.1673-8926.2015.05.018
郑剑锋1,2,沈安江1,2,乔占峰1,2
Zheng Jianfeng1,2, Shen Anjiang1,2, Qiao Zhanfeng1,2
摘要:
传统的露头地质建模方法得到的模型为二维概念模型,不能满足当前油气生产的需要,而基于数字露头的三维地质建模技术在国外已比较成熟,但在国内尚处于起步阶段。以塔里木盆地巴楚地区一间房剖面礁滩复合体为研究对象,对其测量了 9 条测线,划分了 10 个地层单元,识别出 10 种沉积微相;实测孔隙度与渗透率资料均显示储层的发育具有明显的相控性,礁基与礁基(特粗滩)均有利于孔隙发育,台缘滩、礁坪和礁翼均次之,礁核和台内中高能滩均相对较差,而台内中低能滩和滩间海均不利于孔隙发育。利用激光雷达对露头进行扫描,得到礁滩复合体的三维激光点云图,并在其中进行地层追踪、解释及加载地质信息,建立了三维数字露头。 在 GoCAD 软件中,根据三维数字露头的地质信息,以相控储层建模的思路建立了三维沉积微相模型、孔隙度模型和渗透率模型,其清晰地展示了礁滩复合体的沉积微相、孔隙度和渗透率在三维空间中的变化情况。该模型可运用于井下,为塔中地区良里塔格组礁滩复合体储层的勘探与开发提供依据。
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