基于广义三棱柱体元的三维地层建模方法

3D stratum modeling method based on generalized tri-prism volume element

为了解决基于广义三棱柱(GTP)的三维地层模型自动建模问题,提出了一种三维地层构造知识推理规则和建模方法。该方法结合钻孔数据特点和地层分布规律,首先以孔口数据生成地表面不规则三角网(TIN),然后根据地层构造知识推理规则,将TIN中的三角形逐个沿钻孔向下扩展生成GTP,建立三维地层模型,能够解决包括尖灭、分叉和断层等在内的复杂地层构造推理和自动建模。该方法对基于GTP的三维地层建模具有一定的参考价值和指导意义。

In order to solve the 3D automatic modeling problem of strata based on Generalized Tri-prism （GTP）, a kind of 3D stratum structure knowledge inference rule and modeling method is put forward. This method can consider borehole data characteristics and the stratum distributing laws, firstly takes borehole collar data to generate triangle irregular network （TIN）, then with the proposed stratum knowledge inference rule, expands each triangle of TIN down into generalized tri-prism along borehole trace, and 3D stratum model is built. This method can be used to solve automatic modeling and deducing problems of complex geological structures such as pinch-out, bifurcation, fault and so on. and it has reference value and instructional meaning for 3D modeling of stratum based on GTP model.