基于单偶极混合测量模式的反射波测井方法研究（英文）

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