饶莹,
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
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
详细信息
作者简介: 周衍, 男, 1992年生, 中国石油大学(北京)硕士研究生, 主要从事地震数据处理和解释研究
通讯作者: 饶莹, 女, 1979年生, 博士, 教授, 博士生导师, 主要从事地球物理理论和方法研究.E-mail:raoying@cup.edu.cn
中图分类号: P631收稿日期:2017-12-08
修回日期:2017-12-12
上线日期:2018-01-05
Seismic inverse Q filtering for carbonate reservoir characterization
ZHOU Yan,RAO Ying,
China University of Petroleum(Beijing), State Key Laboratory of Petroleum Resources & Prospecting, Beijing 102249, China
More Information
Corresponding author: RAO Ying,E-mail:raoying@cup.edu.cn
MSC: P631--> Received Date: 08 December 2017
Revised Date: 12 December 2017
Available Online: 05 January 2018
摘要
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.
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
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.
Key words:Inverse Q filter/
Reservoir characterization/
Carbonate reservoir/
Fracture-vuggy illustration/
Ordovician
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