面向随钻约束处理的地震资料准备与质量监控

发布时间：2018-10-05 16:41

【摘要】：随钻约束处理作为将地面地震资料应用于开发地震的有效方法,对地震数据准备的时效性和质量提出了新的要求。在随钻约束处理需求和油田存档地震资料问题分析的基础上,本文提出面向随钻约束处理的地震数据存储、准备策略和质量监控新方法。地震资料准备策略涵盖当前深度偏移的三种基准面,即深度域共中心点(common mid-point,CMP)基准面、地表圆滑面和统一基准面;数据存档策略同时考虑数据准备时效性、数据存储经济性和数据通用性,存档资料可直接用于克希霍夫时间偏移、深度偏移,也可通过抽取炮集用于逆时偏移成像。提出针对CMP道集的道头字绘图、换算与对比,以及针对道集和速度质量的验证叠加和验证偏移质量监控方法,全面保证用于随钻约束处理的道集和速度质量。中国西部某油田随钻约束处理作业应用实例表明,本文方法在保证随钻约束处理时效性需求的前提下,同时保障了对道集和速度质量的需求,最终钻井效果改善明显。
[Abstract]:As an effective method to apply the ground seismic data to the development of earthquakes, the constraint processing while drilling puts forward new requirements for the timeliness and quality of seismic data preparation. Based on the analysis of the problem of drilling constraint processing and seismic data archiving in oil field, a new method of seismic data storage, preparation strategy and quality control for drilling constraint processing is proposed in this paper. The seismic data preparation strategy covers three datum levels of current depth migration, that is, the depth domain common center point (common mid-point,CMP) datum level, the surface smooth surface and the unified datum level, and the data archiving strategy also considers the timeliness of data preparation. Data storage economy and data generality, archived data can be directly used for Kirchhoff time migration, depth migration, or by extracting shot set for inverse time migration imaging. This paper presents a method for mapping, conversion and comparison of trace header for CMP gathers, as well as a method for verifying stacking and verifying migration quality for gathers and velocity-quality, so as to ensure the gathers and velocity quality for constrained processing while drilling. The application example of a certain oil field in western China shows that the method not only guarantees the requirement of time efficiency, but also ensures the demand of gather and velocity quality, and the effect of drilling is improved obviously in the end.
【作者单位】：中国石油勘探开发研究院西北分院;
【分类号】：P631.4

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