摘要
为增加密度三维反演过程中的约束及避免'上漂'现象,从定性与定量相结合的角度提出一种密度相关概率成像与基于钻井的位场特征约束相结合的双重约束机制,重点提出以核函数均值差作为扫描函数,并给出依据剖分网格密度属性与位场分布相关性差异进行密度值双重约束的具体方案。理论模型试验结果表明,利用所提方法在先得到地下剖分单元的密度定性分布特征的情况下,可给出定量反演过程中的剖分网格密度取值范围及其搜索顺序,尤其在有钻井资料的区域中反演结果的纵向分辨率得到了较大提高。实际资料处理结果进一步验证了方法的实用性。
To increase the density of the restriction of 3D inversion process and avoid ＂resting on＂ phenomenon, from a com- bination of qualitative and quantitative point of view, a dual constraints mechanism was proposed using the combination of the probability density associated with the imaging and field characteristics based drilling bit constraint method. In the mecha- nism, the mean difference of core function was taken as scanning function, and specific programs for the density＇s dual con- straints based on the relevant difference between subdivision grid density distribution of property and field were given. The theoretical model test results show that if the qualitative distribution characteristics are given, the value range and the search order of decomposing mesh in the process of quantitative inversion can be obtained by using this method, especially in the ar- ea of drilling data of seismic data, the inversion vertical resolution is greatly improved. Finally, the actual data processing re- suits further prove that this method is of practicability.
出处
《中国石油大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2011年第6期43-50,共8页
Journal of China University of Petroleum(Edition of Natural Science)
基金
国家重大专项课题(2008ZX05020-006)
关键词
地球物理勘探
重磁勘探
密度反演
成像技术
双重约束
黄金分割
约束扩展
赋存空间
geophysical prospecting
gravity and magnetic prospecting
density inversion
imaging techniques
double con-straint
golden section
constraint expansion
occurrence space
