| 地震反Q滤波应用于碳酸盐岩储层特征描述 |
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| 引用本文： | 周衍,饶莹.地震反Q滤波应用于碳酸盐岩储层特征描述[J].地球物理学报,2018,61(1):284-292. |
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| 作者姓名： | 周衍 饶莹 |
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| 作者单位： | 中国石油大学(北京)油气资源与探测国家重点实验室, 北京 102249 |
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| 基金项目： | 国家自然科学基金优秀青年科学基金项目（41622405）资助. |
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| 摘 要： | 塔里木盆地塔河地区的奥陶系碳酸盐岩储层埋藏深，其深度超过5000 m，储集体类型以裂缝、缝洞为主，储层的纵向和横向上都具有极强的非均质性.这些特点导致反射地震数据的信噪比低、分辨率低，从而使得碳酸盐岩储层特征描述的难度增大.针对这些问题，本文运用稳定化反Q滤波方法对塔河地区的三维地震数据进行提高分辨率处理，同步实现地震振幅补偿和子波相位校正.处理结果与原始地震数据进行地震剖面面貌、储层内幕信息、断裂缝洞刻画等方面的直接对比，一方面展示反Q滤波方法在提高分辨率、提高弱反射能量、以及增强反射同相轴的空间连续性等方面的优势，同时展示稳定化反Q滤波方法能够提高对奥陶系碳酸盐岩缝洞储集体的特征描述精度.
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| 关 键 词： | 反Q滤波 储层特征描述 碳酸盐岩储层 缝洞储集体刻画 奥陶系 |
| 收稿时间： | 2017-12-08 |
Seismic inverse Q filtering for carbonate reservoir characterization |
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| ZHOU Yan,RAO Ying.Seismic inverse Q filtering for carbonate reservoir characterization[J].Chinese Journal of Geophysics,2018,61(1):284-292. |
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| Authors: | ZHOU Yan RAO Ying |
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| Institution: | China University of Petroleum(Beijing), State Key Laboratory of Petroleum Resources & Prospecting, Beijing 102249, China |
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| Abstract: | The Ordovician carbonate reservoir in Tahe oilfield, Tarim basin, is buried very deep with a depth being larger than 5000 m. The reservoir is featured by fracture-vuggies, and the formation has extremely strong heterogeneity in both the vertical and horizontal direction.These features lead to low signal-to-noise ratio and low resolution of the seismic reflection data, and in turn to the difficulty in characterization of carbonate reservoirs.Aiming at these problems, here we use a stabilized inverse-Q filter to process the three-dimensional (3D) seismic data in Tahe oilfield, conducting seismic amplitude compensation and waveform phase correction, simultaneously.Comparing the inverse-Q filtered result directly with the raw seismic data in terms of seismic profiling, interior information within the reservoir, characterization of faults and fracture-vuggies, we demonstrate the advantages of stabilized inverse-Q filtering in enhancing seismic resolution, strengthening weak signals, and improving lateral continunity of reflections, and reveal that this method can improve the accuracy of fracture-vuggy characterization in the Ordovician carbonate reservoirs. |
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| Keywords: | Inverse Q filter Reservoir characterization Carbonate reservoir Fracture-vuggy illustration Ordovician |
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