基于单偶极混合测量模式的反射波测井方法研究(英文)

作者:宫昊;陈浩;何晓;苏畅;王秀明;王柏村;严晓辉; 刊名:Applied Geophysics 上传者:冯关周

【摘要】高质量的观测系统是获得高质量地震数据的关键,并能影响到数据处理成像的精度。本文在分析观测系统质量与四个采集参数(接收道数,跑线距,接收线距和接收线数)关系的基础上,提出了基于综合质量因子的观测系统质量评价方法,给出了观测系统质量随四参数变化的关系式。根据野外采集实际资料,利用综合质量因子评价方法,计算并给出了观测系统随四参数变化的关系曲线,分析结果显示,炮线距对观测系统质量影响最大,接收线距的增大可以适当的提高观测系统质量,接收道数增加可以提高观测系统质量,不同的采集参数对浅层和深层同相轴成像质量有不同的影响。并利用模型正演和叠前深度偏移方法生成不同采集参数的叠前深度偏移剖面,成像结果显示与上述计算分析结果一致。在实际生产中根据目的层深度,应用本文质量因子评价方法指导观测系统的设计,优选采集参数,达到提高地震数据成像精度的目的。

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IntroductionAt present, the gas and oil exploration tends tosearch for small, subtle, and deep reservoirs. Detailedinformation about the deep reservoir structures, isespecially useful at resolutions greater than what are currently available in the seismic data. Conventionalsonic logging, with resolution on the scale of a fewinches, typically penetrates only two or three boreholeradii into the formation and cannot satisfy the demandsof modern petroleum exploration. To overcome theabove constraints, a single-well acoustic reflectionimaging (SWRI) technique was proposed (Hornby, 1989; Tang, 2004; Haldorsen et al., 2006). Based onat the expense of decreasing the detection range.the modifi ed sonic logging technology, acoustic signalsWe recently demonstrated that the azimuth ambiguitygenerated by the source with a center frequency of a fewcan be eliminated by using the migration technique andkHz are transmitted into the formations and the signalsthe three-component sonic data of the refl ections (Gong etrefl ected from the geologic interfaces are migrated intoal., 2015). However, this requires three-component sonica spatial image. The SWRI technique shows potential indata that cannot be measured by current sonic loggingthe exploration of unconventional resources, fi lling thetools. Hence, presently, additional information should beresolution gap between conventional sonic logging andsought and used to resolve the azimuth ambiguity (Zhangseismic data.and Hu, 2014), such as dip lo

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