岩石物理参数高分辨率地质统计学反演

2012年 51卷 第No. 6期
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High-resolution geostatistical petrophysical-parameter inversion
同济大学海洋与地球科学学院,上海200092
Jiang Wenlong,School of Ocean and Earth Science,Tongji University,Shanghai 200092,China
地质统计学反演由于其高分辨率的特点,可以很好地用来描述薄层等信息。就地质统计学反演与高分辨率的
关系和地质统计学反演在岩石物理参数反演中存在的问题进行了讨论,并从算法上研究了减小反演不确定性的方法
。研究结果表明,随着变差函数变程的改变,地质统计学模拟结果的分辨率也会发生改变,但常规的克里金算法在
通过减小变程来提高分辨率的同时,破坏了原有地质层位的连续性。在此基础上提出加入地质解释层位和地层倾角
等约束信息的地质统计学反演方法,将该方法应用于南海ODP1144站位海区矿物组分的反演,很好地揭示了该区碳
酸盐矿物的沉积特征。
Geostatistical inversion can well characterize thin-layers for its high-resolution.We discussed the relationship between
geostatistical inversion and high-resolution,as well as the problem of geostatistical inversion in petrophysical parameter
inversion.Moreover,the algorithm for reducing the uncertainty of inversion was studied.Research results show that along with
the alternation of variogram,the resolution of geostatistical inversion result will change,but the conventional Krigging algorithm
destroy the continuity of original geologic formations when improving resolution through reducing variogram.Based on the
above results,we introduced some restraints such as geologic interpretation strata and dip into geostatistical inversion.The
method was applied on the inversion of carbonate mineral components at ODP1144 station sea area in South Sea.
地质统计学; 高分辨率; 变差函数; 岩石物理参数反演;
geostatistics; high-resolution; variogram; petrophysical parameter inversion;
10.3969/j.issn.1000-1441.2012.06.014