摘要
在巴基斯坦M工区构造解释过程中,断层下盘地震同向轴经常出现"上拉"、"下陷"等断层阴影现象,存在解释陷阱;断层阴影是断层上下盘不同层位层速度变化差异产生的。利用正演模拟技术能够有效的定量研究断层阴影现象,通过不同断层产状、断层断距的正演模拟结果分析得出,断层断距是该工区形成断层阴影的主要因素,随着断距的增加断层阴影现象越明显。利用对断层阴影分析的结果,能够有效识别虚假断裂、精细刻画断裂、准确落实构造,在该工区取得了较为明显的效果。
In the process of structure interpretation in Pakistan M work area, the seismic synthetic shaft of fault footwall often have the fault shadow phenomenons, such as ＇upward pull＂ ＂cave in ＇and it has the interpretation pitfall. Fault shadow appears when there are differences of horizons and layer speed changes on fault upthrowns and downthrowns. Using the forward modeling technology can effectively quantify fault shadow phenomenon, and through analyzing the forward modeling results of different fault occurrence fault and fault distance, we can get that the fault and fault distance are the main factors of fault shadow in this work area, besides, with the increase of fault distance, the fault shadow phenomenon become more obvious. Making use of the analysis results of fault shadow, we can effectively identify the false fracture, refined description fault and accurately carry out the construction, which work brings relatively obvious effects in this area.
出处
《当代化工研究》
2016年第9期13-15,共3页
Modern Chemical Research
关键词
断层阴影正演模拟
技术断层
断距
断层产状
fault shadow forward modelling
technical fault
fault displacement
fault occurrence
