拟合 Q 体建模技术及应用

doi:10.3969/j.issn.1673-8926.2015.03.014

Lithologic Reservoirs ›› 2015, Vol. 27 ›› Issue (3): 94-97.doi: 10.3969/j.issn.1673-8926.2015.03.014

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Application of fitting stereoscopic Q modeling technology

CUI Hongliang ^1，2， LIU Zhanjun²， WAN Xuejuan³， WANG Zedan^1,4， CHENG Zhanzhan²， ZHANG Xueyin^1，2

1. College of Geophysics and Information Engineering ， China University of Petroleum （ Beijing ）， Beijing 102200 ， China ；2. Huabei Geophysical Exploration Department of BGP ， CNPC ， Renqiu 062552 ， Hebei ， China ； 3. Huabei Branch of Geophysical Research Institute ， BGP ， CNPC ， Renqiu 062552 ， Hebei ， China ； 4. Department of Exploration ，PetroChina Huabei Oilfield Company ， Renqiu 062552 ， Hebei ， China

Online:2015-05-26 Published:2015-05-26

Abstract

Abstract:

Due to the absorption and attenuation in seismic exploration, the received frequency is reduced, which seriously affects the quality of the seismic data. Therefore, the data must be compensated for its decay. VSP data receives the direct wave, and the traveling time is short, so it has high S/N, and Q value calculated by spectral ratio method is more reliable. However, the number of VSP wells within the region is limited, so the calculated Q value can not represent the entire region. This paper presented a combined method to calculate the fitting Q value, which is based on the Li Qingzhong formula. It relies on the exact velocity spectrum picked. This Q value is calculated after VSP calibration data, and creates a variable stereoscopic Q model. By comparing the application of actual data, this fitting Q modeling technology can improve the overall energy and frequency. This calculated Q value is reliable, and this new method is worth of learning.

Key words: fitting stereoscopic Q, attenuation, resolution, amplitude spectrum, spectral ratio method, frequency spectrum

CUI Hongliang, LIU Zhanjun, WAN Xuejuan, WANG Zedan, CHENG Zhanzhan, ZHANG Xueyin. Application of fitting stereoscopic Q modeling technology[J].Lithologic Reservoirs, 2015, 27(3): 94-97.

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