摘要
塔里木探区油气勘探逐步进入开发阶段,为了研究三维采集过程中密集的油田设施和大钻干扰对资料品质的影响,本文以塔北油区为目标区,以噪音空采试验为基础,对区内主要干扰源进行调查录制。通过分析总结其分布及衰减特征,认为影响该区域资料成像的主要干扰为大钻干扰。通过模拟不同能级干扰到正演模型数据的叠前偏移处理和分析,得到大钻干扰的能量超过目的层有效反射能量1倍时,缝洞体成像逐渐受到影响的结论。通过模拟不同能级干扰到实际地震资料数据的叠前偏移处理和分析,认为塔北地区正在钻进的大钻干扰能量大于200μV时即直径700m范围内,对溶洞体周边裂缝预测影响较大。
Oil and gas exploration of Tarim basin gradually stepped into the stage of development.In the process of seismic data acquisition,oil facilities and drilling rig being the largest interference sources affect the effective reflection seismic signal.So,the study of features and propagation law in these interference has very important significance to quality monitoring.For the target area in north Tarim basin,investigating the main interference sources to record and analysis its main features.On this basis,simulate different energy levels of interference to the forward model and real seismic data,analysis of its impact on the subsurface geological bodies.Whereby,we get the main interferences' control indicator in seismic acquisition work of north Tarim basin.
引文
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