沙漠区光纤3D-VSP技术及应用OA

In the desert hinterland of the Junggar Basin,the seismic data fidelity and resolution are generally low,leading to unclear understanding of the genesis and distribution patterns of volcanic reservoirs,and difficul-ties in reservoir prediction and detailed characterization of hydrocarbon accumulations.To accurately delineate the complex internal characteristics of Carboniferous volcanic reservoirs and enhance the resolution of target ho-rizons in seismic data,China's first onshore fiber-optic 3D-VSP seismic pilot test was conducted in the hinter-land of the Junggar Basin.Techniques for acquisition,processing,and interpretation tailored for 3D-VSP data were proposed.First,a VSP data acquisition observation system was designed based on geological requirements and the characteristics of fiber-optic equipment,and high-quality VSP seismic data were obtained using efficient vibroseis sources and distributed fiber-optic receivers.Subsequently,by analyzing the characteristics of fiber-optic data and tackling key processing techniques,reliable borehole seismic data processing results were achieved.Finally,through high-resolution VSP imaging,a joint comparison and interpretation of surface and borehole seismic data were conducted to analyze the spatial characteristics of the target reservoir.Methods for de-scribing and characterizing deep Carboniferous volcanic reservoirs were discussed,thereby improving reservoir prediction accuracy and reducing the multiplicity of interpretations in seismic data analysis.Application results demonstrate that this method provides a more reliable data foundation for the detailed characterization of Carbon-iferous hydrocarbon reservoirs in the Junggar Basin,offering significant support and implications for efficient oilfield exploration and development.