基于地震数值模拟的低序级断层地震识别能力分析

Analysis of recognition ability of low order fault based on seismic numerical simulation

除了断层本身因素外,低序级断层所处的构造环境也是影响低序级断层地震识别能力的重要因素。本文将地层倾角、断层组合样式等构造因素引入低序级断层地震数值模拟中。模拟结果表明:随着地层倾角的增大,低序级断层地震识别能力呈降低的趋势;断层组合样式对低序级断层地震识别的影响主要表现为不同断层间距离的低序级断层识别能力存在差异。研究结果对于低序级断层的准确判断以及低序级断层地震解释精度的参考具有重要意义。

In addition to the fault itself,the tectonic environment of low sequence faults is also an important factor affecting the seismic recognition ability of low sequence faults.In this paper,the structural factors such as formation dip angle and fault combination style are introduced into the numerical simulation of low order fault earthquakes.The simulation results show that:with the increase of the dip angle,the recognition ability of low sequence faults decreases;the influence of fault combination style on the recognition ability of low sequence faults mainly shows that the recognition ability of low sequence faults with different distance between faults is different.The research results are of great significance for the accurate judgment of low sequence faults and the reference of seismic interpretation accuracy of low sequence faults.