岩石地层描述的数字方法与实现

Numerical Method of Lithostratigraphic Description and Its Realization

赵刚 陈虎 谭秀成 肖劲东

ZHAOGang CHENHu TANXiucheng XIAOJindong

西南石油大学计算机科学学院, 四川 成都 610500 西南石油大学地球科学与技术学院, 四川 成都 610500 中国地质大学(武汉)地球科学学院, 湖北 武汉 430074

School of Computer Science, Southwest Petroleum University, Chengdu, Sichuan 610500, China School of Geosciences and Technology, Southwest Petroleum University, Chengdu, Sichuan 610500, China Faculty of Earth Sciences, China University of Geosciences, Wuhan, Hubei 430074, China

针对传统机械式记录及描述岩石地层方法中存在的不足，以具有成因联系的沉积序列为岩石地层描述的最小地质实体，探索了岩石地层描述数字方法及其计算机实现，即以地层单元与基本地层单元的自相似对比构建岩石地层描述的框架，再以抽象的岩石图元符号迭代运算实现框架内容的可视化。基于此，完成了岩石地层数字描述系统的研发。并以冷水溪实测剖面为例，对系统进行地层描述数字化的可行性与科学性作了论证。结果表明，运用基本岩石地层单元与岩石地层单元自相似性特征实施地层描述，可简明阐释地层沉积过程和客观规律。为岩石地层描述提供了一种高分辨率的智能描述方法，为区域地质填图提供了新的技术平台，在区域地质调查与油气资源勘探等领域具有重要的理论与现实意义。

To solve problems in conventional mechanical recording and lithostratigraphic description methods, this study investigated the numerical description of rock strata and its digitization using diagenetically related depositional sequences as the fundamental geological unit for lithostratigraphic description. By comparing the self-similarity of stratigraphic units and the basic stratigraphic units, a framework was constructed for rock stratigraphic description. Iterations were performed with abstract rock unit symbols for visualizing the framework content. The measured cross-section profile of Lengshui Creek was taken as an example for demonstrating the feasibility and scientific validity of digitizing stratigraphic descriptions with the system. The results show that stratum description with the self-similarity of the basic stratigraphic units explains the sedimentation process and pattern in a clear and concise manner. This has important theoretical and practical significance in regional geological survey and hydrocarbon resource exploration.

10.11885/j.issn.1674-5086.2017.03.29.01