岩性油气藏 ›› 2015, Vol. 27 ›› Issue (5): 2529.doi: 10.3969/j.issn.1673-8926.2015.05.005
曾齐红1,马乙云1,2,谢 兴1,张友焱1,叶 勇1,刘 松1
Zeng Qihong1, Ma Yiyun1,2, Xie Xing1, Zhang Youyan1, Ye Yong1, Liu Song1
摘要:
根据地面激光雷达、高精度差分 GPS 和高精度数码影像资料,制定数字露头野外数据采集方案,建立激光雷达点云数据拼接和坐标转换处理流程,提出基于最佳趋势面的三角网建模方法和数字露头表层模型优化方法。 利用该方法,建立了鄂尔多斯盆地延长组谭家河露头的数字露头表层模型,在该模型的基础上开展了露头砂体展布与发育情况的分析,对识别出的三角洲平原分流河道砂体和三角洲前缘水下分流河道砂体进行了定量描述,前者单河道砂体垂向上呈孤立叠置样式,宽厚比小,后者单河道砂体垂向上呈多期连续叠置样式,宽厚比明显较大,进而对露头砂泥岩分布进行分析。 该区砂体发育受沉积环境控制,分流河道以及水下分流河道砂体发育区砂地比明显较大,砂地比由小变大的方向为北东—南西向,与研究区物源方向基本一致。
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