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钻孔数据是三维地层建模的主要数据来源之一,在三维地层建模中,地层界面一般基于钻孔数据插值而成,正确处理钻孔数据是构建理想三维地层模型的前提和基础。三维地层拓扑关系极其复杂,地层界面插值数据在数学上选择也不是惟一的,因此,常导致构建地层模型出现与事实相悖的情形。针对这一点,根据地层地质演变历史,建立地层层序序列,此序列记录地层地质年代顺序及其拓扑关系。根据地层地质特征,可将地层拓扑关系概化为两类:“覆盖”和“侵蚀”。据此地层层序序列可惟一确定地层界面插值数据,从而构建正确地层模型。采用python语言实现了该钻孔数据预处理算法,实例表明,该预处理方案能正确地预测实际地层。
Drilling data is one of the main data sources for 3D stratum modeling. In 3D modeling, stratum interface is usually based on borehole data interpolation. Correct handling of borehole data is the prerequisite and basis for constructing ideal 3D stratum model. The topological relationship between 3D stratums is extremely complicated, and the interpolation data of stratum interface is not uniquely selected in mathematics. Therefore, it often leads to the fact that the stratum model is not in conformity with the facts. In response to this, according to the history of formation geological evolution, stratigraphic sequence sequence is established, which records the sequence of stratigraphic geology and its topological relationship. According to the geological characteristics of the strata, the stratigraphic topological relations can be generalized into two types: “cover” and “erosion”. Therefore, the sequence sequence of stratigraphic sequence can only confirm the data of interfacial interpolation and construct the correct stratigraphic model. The algorithm of drilling data preprocessing is implemented in python language. The example shows that the pretreatment scheme can accurately predict the actual formation.