渤海油田新近系地震资料保幅处理研究与实践

Research and practice on amplitude preservation processing of Neogene seismic data in Bohai Oilfield

随着地震勘探程度的不断提高,大中型油气田发现难度越来越大,隐蔽型岩性油气藏逐渐成为重要的勘探目标,准确表征复杂岩性储层需要更高品质的地震资料,资料的保幅性是提高岩性勘探成功率的关键.针对岩性勘探的难点以及对资料保幅处理的需求,本文首先分析了渤海油田地震资料保幅处理面临的主要问题,在常规保幅处理思路和应用效果分析的基础上,结合不同地区实际地质特征从处理流程,处理参数优化方面进行了相关研究;针对特殊地质体存在造成地震资料无法反映实际地质特征的问题,通过不同批次采集地震资料的融合处理提高地震资料的保幅性.相关保幅处理的流程和技术为渤海油田发现的两个亿吨级岩性油田提供了重要的资料基础和参考依据.

With the continuous improvement of the degree of seismic exploration,the discovery of large and medium-sized oil and gas fields has become more and more difficult.Subtle lithological oil and gas reservoirs have gradually become important exploration targets.The accurate representation of complex lithological reservoirs requires higher-quality seismic data.Amplitude is the key to improve the success rate of lithological exploration.In view of the difficulties in lithological exploration and the demand for data amplitude preservation,the main problems faced by the seismic data preservation processing of the Bohai Oilfield are first analyzed.Based on the conventional amplitude preservation processing ideas and application effectiveness analysis,the seismic response mechanism is studied in detail.We have conducted relevant research on the optimization of processing processes and parameters based on the actual geological characteristics of different regions;In response to the problem of special geological bodies causing seismic data to not reflect actual geological characteristics,the amplitude preservation of seismic data is improved through the fusion processing of seismic data collected from different batches.The study has provided an important data basis and reference basis for the two hundred million-ton lithologic oil fields discovered in the Bohai Oilfield.