基于静校正模型的速度场基准面转换方法

发布时间：2018-02-26 12:37

本文关键词： CMP参考面叠加速度均方根速度基准面静校正静校正模型高速顶界面中间参考面　出处：《石油地球物理勘探》2016年05期 　论文类型：期刊论文

【摘要】：本文从基准面静校正技术和CMP参考面的定义出发,对速度场从CMP参考面转换至统一基准面存在的问题进行了深入研究,获得了静校正模型中高速顶界面或中间参考面在时间域和深度域均具有确切定义的认识,提出并实现了从CMP参考面至高速顶界面或中间参考面的介质剥离,从高速顶界面或中间参考面至统一基准面的常速介质充填的速度场基准面转换方法,较好地解决了速度场从CMP参考面到统一基准面的转换问题,为充分利用地震速度信息建立时深转换速度场奠定了基础。该方法具备明确的物理意义,所获得的统一基准面速度具有较高的时深转换精度,在鄂尔多斯盆地东缘煤层气新探区取得了良好的应用效果。
[Abstract]:Based on the statics of datum level and the definition of CMP reference plane, the problems existing in the conversion of velocity field from CMP reference plane to unified datum surface are studied in this paper. The exact definition of high speed top interface or intermediate reference plane in time domain and depth domain in static correction model is obtained, and the medium stripping from CMP reference plane to high speed top interface or intermediate reference surface is proposed and realized. The conversion method of velocity field datum from high speed top interface or intermediate reference plane to constant velocity medium filling with uniform datum level solves the problem of velocity field conversion from CMP reference plane to unified datum surface. It lays a foundation for fully utilizing seismic velocity information to establish time-depth conversion velocity field. This method has clear physical significance and the obtained uniform datum velocity has higher time-depth conversion accuracy. Good results have been obtained in the new exploration area of coalbed methane in the eastern margin of Ordos Basin.
【作者单位】：中国矿业大学(北京);中联煤层气国家工程研究中心有限责任公司;
【分类号】：P631.4

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