分形理论在裂缝预测中的尝试

FRACTURE PREDICTION BASED ON FRACTAL THEORY

四川石油管理局地质调查处研究所,南充637000

Geology survey divison, Sichuan Petroleum administration, Nanchong 637000

本文试图利用适合处理复杂现象的分形理论来解决地震解释中的油气预测和裂缝发育带预测这两个问题.文中首先介绍了计算分维的两种方法.实例表明,这两种算法对地震道的油气预测是有效的.然后,用分形插值的办法对地质剖面的裂缝发育带进行预测,取得了较为满意的结果.最后给出了根据上述方法编制的交互式裂缝预测系统IFFS及其对实际资料的处理结果.

An attempt has been made in this paper in predicting oil/ gas and fracture-developed zones during seismic interpretation based on fractal theory. The paper firstly put forward two methods for calculating fractal dimension. Their effectiveness in oil / gas prediction from seismic traces is demonstrated via a number of applied examples. Satisfactory results arc then achieved in fracture-developed zone prediction over a geologic section by means of fractal intcrplation. An interactive system (IFFS) for fracture prediction has been worked out based on the techniques mentioned above and the results from applying IFFS to real data arc finally presented.