Compaction is the only consideration for 'velocity-depth' linear model of sedimentary strata.With the velocity spectra data along a multi-channel seismic profile in deep-water area of South China Sea basin and by applying the 'velocity-depth' linear model to the interpreted data of the profile,the authors obtained direct results for geological interpretation.In addition,through the creation of visual workflow and the consideration of horizontal variation of sedimentary interval velocity within the depth conversion procedures,the authors made the results of depth conversion more reliable.In the end,the authors gave a discussion on the limitation and further application of 'velocity-depth' linear model both from theory and practice,which deserves consideration in further work.
汪俊, 徐子英, 任卫波. 复杂沉积区地震剖面时深转换的多公式拟合方案及应用[J]. 物探与化探, 2020, 44(1): 149-155.
Jun WANG, Zi-Ying XU, Wei-Bo REN. The time-to-depth conversion based on multi-functions fitting solution and its application to complicated sedimentary area. Geophysical and Geochemical Exploration, 2020, 44(1): 149-155.
Zhang Y D . Multi-scale time to depth conversion method for deep low relief structures——take Block X in Al[J]. Progress in Geophysics, 2013,28(4):1943-1953.
Chen L, Deng Y, Gai Y H , et al. Exploration of time-depth conversion method in complicated fault block——take Weixinan sag for example[J]. Progress in Geophysics, 2014,29(3):1121-1127.
Li P P, Liu Z G, Yang S L , et al. The application of virtual well technique to time-depth conversion under the condition of no or few wells[J]. Geophysical and Geochemical Exploration, 2015,39(5):994-1000.
Zhang G D, Liao Y, Ma G K . Application of high precision velocity modeling methods for time-depth conversion in deepwater M gas field[J]. Progress in Geophysics, 2016,31(5):2246-2254.
Zhang Z M, Cao D P, Yin X Y , et al. Research and application atatus of well seismic joint velocity modeling in time-depth conversion[J]. Progress in Geophysics, 2016,31(5):2276-2284.
Guo L, Deng Y, Zhao S L , et al. Research and discussion of time-depth conversion methods under special geological conditions[J]. Progress in Geophysics, 2017,32(1):152-159.
Qin T, Cai J Y, Wang G W , et al. A study of time-depth conversion of high-velocity anomaly area in the steep slope zone of Shijiutuo uplift[J]. Geophysical and Geochemical Exploration, 2018,42(3):589-593.
Zhang C H, Qiao D W, Li S Z , et al. Integration of oil and gas geophysical exploration technologies for geologically complex areas[J]. Chinese Journal of Geophysics, 2011,54(2):374-387.
Lu B L, Wang P J, Zhang G C , et al. Basement structures of an epicontinental basin in the northern South China Sea and their significance in petroleum prospect[J]. Acta Petrolei Sinica, 2011,32(4):580-587.
Fan F, Liu A Q, Ren K Y , et al. Velocity analysis and time-depth conversion study of Ledong-Lingshui slope-break belt[J]. Geophysical and Geochemical Exploration, 2016,40(6):1185-1191.
Wang J, Gao H F, Huang Y J . Velocity analysis of South China Sea central basin deep-water area based on the linear horizontally continuous medium model[J]. Research of Geological South China Sea, 2010,1:67-76.
Li W X, Wang H, Yao Z X , et al. Shear-wave velocity setimation and fluid substitution by constraint method[J]. Chinese Journal of Geophysics, 2009,52(3):785-791.
Wang Y T, Wang L F, Zeng X H , et al. A preliminary analysis of the seismic velocity in the south yellow sea basin and the north yellow sea basin[J]. Geophysical and Geochemical Exploration, 2008,32(3):241-246.
Huang C J, Zhou D, Chen C M , et al. The deep-crustal structures of Baiyun Sag revealed by deep seismic reflection profile[J]. Chinese Science Bulletin, 2005,50(10):1024-1031.
Zhang L, Li H, Zhi L , et al. Study and applicaton of velocity modeling under the constraint of full geological structure framework[J]. Progress in Geophysics, 2018,33(4):1637-1644.
Guo A H, Zhou J X, Zhang G D , et al. The exploration and application of time-depth conversion method in two kinds of complex structures[J]. West-China Exploration Engineering, 2010,( 11):54-59.
Yang J H, Zhou J X, Song A X , et al. Multivariate layer stripping based on the origin velocity cube depth conversion method used in deepwater area——take structure of central canyon A for example[J]. Progress in Geophysics, 2015,30(3):1437-1443.
Wang J, Gao H F, Chen H J . Time to depth conversion based on velocity-depth linear model and its application in the deep-water area of South China Sea[J]. Journal of Tropical Oceanography, 2013,32(2):112-117.
Zhou D, Hu D K, He M , et al. The selection of fitting curve in time-depth transformation of deep-seated strata and crust[J]. Earth Science-Journal of China University of Geosciences, 2008,33(4):531-537.
Yang H Z, Zhao Z G, Zhang S Q , et al. Discussion of fitting formula time-depth conversion in deep strata[J]. Progress in Geophysics, 2016,31(4):1852-1856.
[21]
Dix C H . Seismic velocities from surface measurements[J]. Geophysics, 1955,20:68-86.
He M, Zhu M, Wang R L , et al. The discussion of time-depth conversion methods in the baiyun deepwater rough seafloor area[J]. Progress in Geophysics, 2007,22(3):966-971.