A method for improving VSP resolution by inverse Q filtering
Yan Hong-yong1,2, Liu Yang1,2, Zhao Qian-hua3, Li Xu-xuan4, Jiang Nan-sen4
1. State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum(Beijing), Beijing 102249, China;
2. CNPC Key Laboratory of Geophysical Exploration, China University of Petroleum(Beijing), Bei-jing 102249, China;
3. Oilfield Technology Department, China OilfieldServices Limited, Beijing 101149, China;
4. Petroleum Research Centre of CNOOC, Beijing100027, China
Abstract：Because the difference of seismic wave attenuation between VSP and surface seismic,it is inaccurate to use inverse Q filtering method of processing directly surface seismic data.Based on the inverse Q filtering for surface seismic data(Wang),we propose in this paper an inverse Q filtering suitable for VSP data.Firstly we apply wave field separation of upgoing wave and downgoing wave on VSP data.Then we use inverse Q filtering compensation according to VSP upgoing and downing wave characteristics.Test results of this method on model data and real VSP data show that our inverse Q filtering compensation is reliable.
