Abstract:In order to build a relatively accurate near-surface velocity model,we put forward in this paper a new method based on multi-discipline information fusion.First we calculate corresponding variogram functions and weights for the interpolation with Cokriging interpolation based on velocity correlation and change trend between first break tomography inversion and near-surface survey.Then we use covariance to estimate spatial velocity variables,and obtain a final velocity model in which lateral velocity variation trend is consistent with both first break tomography inversion and near-surface survey velocity.So this method improves velocity model accuracy.Good results have been achieved in rugged surface area,Western China,which verifies the effectiveness of the proposed method.
Wang Zhenyu,Yang Qinyong,Li Zhenchun et al.Research status and development trend of near-surface velocity modeling.Advances in Earth Science,2014,29(10):1138-1148.
[4]
Berryhill J R.Wave equation datuming before stack.Geophysics,1984,49(11):2064-2067.
[5]
Zhou Zhengzheng.Velocity Model in Depth Domain.2012 SEG Workshop,2012,Beijing.
Zhou You,Cheng Shiqing,Zhang Min et al.Setting of variogram parameters in reservoir modeling.Journal of Xi'an Shiyou University (Natural Science Edition),2010,25(5):25-27.
Wang Yanlong,Liu Jinhua,Zhang Ting et al.An interpolation method using the Markov model and COSGSIM.Journal of Computer-Aided Design&Computer Graphics,2010,22(10):1715-1720.
Hu Dangui,Shu Hong.Air humidity based on co-Kriging interpolation.Hubei Agricultural Sciences,2014,53(9):2045-2049.
[9]
Mesnard L D.Pollution models and inverse distance weighting:Some critical remarks.Computers&Geoscience,2013,52(1):459-469.
[10]
Oliver M A,Webster R.Kriging:A method of interpolation for geographical information systems.International Journal of Geographical Information Systems,1990,4(3):313-332.
Meng Lingshun,Zhu Renxue,Zhou Yunxuan et al.Application of universal Kriging to the density modeling in northwestern Xujiaweizi area of Daqing oil field.GPP,2001,40(1):88-96.
[12]
Hass A G,Viallix J R.Kriging applied to geophysics:The answer to the problem of estimates and contouring.Geophysical Prospecting,1976,24(1):49-69.
[13]
Olea R A.Optimal contour mapping using universal Kriging.Journal of Geophysical Research,1974,79(A2):695-702.
[14]
高美娟,朱庆忠,张淑华等.利用贝叶斯-克里金估计技术进行储层参数预测.石油地球物理勘探,1999,34(4):390-397 Gao Meijuan,Zhu Qingzhong,Zhang Shuhua et al.Reservoir parameter prediction using Bayes-Kriging estimation technique.OGP,1999,34(4):390-397.
Nian Jingbo,Tang Lei,Liu Xiwu et al.Application of geostatistical analysis in prediction of sand/shale distribution from seismic data:a case study.GPP,2004,43(3):278-282.