【摘要】 针对塔河油田奥陶系大型潜山顶面起伏剧烈、内幕岩溶纵横向变化大的特点,以进一步提高塔河油田碳酸盐岩缝洞型储集体的成像精度及微小断裂成像精度为目标,开展了以三维地震资料目标精细处理和叠前时间偏移处理方法为主的缝洞体精细成像技术研究,建立了以三维层析静校正及近地表模型技术、叠前分频去噪处理技术、三维高保真处理技术、串联反褶积技术、三维速度分析及地表一致性剩余静校正迭代技术、高精度三维偏移速度建模技术、三维叠前时间偏移处理技术为基础的缝洞体精细成像技术。通过缝洞体精细成像技术的应用,使得缝洞体成像质量、风化面成像精度、断裂特征刻画、横向分辨率、资料信噪比及保真度等方面得到明显改善,中、下奥陶统风化面的形态得到精细刻画,为碳酸盐岩缝洞型储层预测及缝洞储集体几何空间半定量—定量化预测奠定了基础。更多还原

【Abstract】 In view of the characters that the top interface of large-scale Ordovician buried-hill is violent fluctuation and interior karst changes greatly in both lateral and vertical directions,and taking further improving the imaging precision of carbonate fracture-cave type’s reservoir and minor faults in Tahe Oilfield as object,we carried out the study on fine imaging technique of fracture-cave type’s reservoir,which focuses on fine and object-oriented 3-D seismic data processing and prestack time migration method,built up fine fracture-cave type’s reservoir imaging techniques taking the 3-D tomographic static corrections and near-surface model technique,prestack frequency-shared denoise,3-D hi-fi processing,series deconvolution,3-D velocity analysis and iterative surface-consistent residual static corrections,3-D high-precision migration velocity model-building technique and 3-D prestack time migration as bases,which made the imaging quality of fracture-cave type’s reservoir,imaging precision of weathered interface,description of fault feature,lateral resolution,S/N ratio and hi-fi of data be greatly improved and the configuration of Mid-Lower Ordovician weathered interface be finely described,laying the foundation for the prediction of carbonate fracture-cave type’s reservoir and semi-quantitative to quantitative prediction of geometric space of fracture-cave type’s reservoir.更多还原