With the deepening of the oil and gas exploration and development,geological object is becoming more and more complex.Due to the requirement of increasing the precision of seismic imaging,especially with the development of high-density and wide-azimuth and wide-band seismic exploration technology,the direction of anisotropy is more and more prominent in the seismic data processing.However,the conventional Kirchhoff prestack time and depth migration uses both offset gathers,the angle gathers information fails to be retained and therefore it is unable to meet the demand of the current seismic processing.By way of full wave field and multipath,full azimuth migration imaging applies all seismic data in a continuous manner in underground local angle domain and generates two complementary full azimuth direction angle gathers and full azimuth common refection angle gathers.Fairly good application effect has been achieved in the migration imaging of Nanmazhuang buried hill tectonic belt,as shown by the facts that the imaging accuracy is improved,the geological phenomena is clearer,and the prediction of fracture density and development direction is more reliable.
Zhao X Z, Tian F Q, Wang Q , et al. Application and performance of delicate and innovative explor-ation practices in oil-rich sags of matured areas[J]. China Petroleum Exploration, 2016,21(6):1-8.
Cui Y Q, Wang Y G, Du W L , et al. Interior characteristics description and reservoir prediction of Renqiu buried hill[J]. Geophysical Prospecting for Petroleum, 2010,49(3):280-286.
Li J, Li Q C, Zhang X H , et al. The application of prestack time migration to coalfield data proce-ssing[J]. Geophysical and Geochemical Exploration, 2017,41(1):171-176.
Liu W, Zhang J F . De-absorption prestack time migration:steep dip structure imaging and its app-lication[J]. Chinese Journal of Geophysics, 2018,61(2):707-715.
Yue Y B, Li Z C, Qian Z P , et al. Optimized imaging schemes of PS-wave Kirchhoff prestack time migration[J]. Chinese Journal of Geophysics, 2018,61(3):1188-1195.
Huang Y Y, Luo R Z, Wang J H , et al. A comparison of the application effects of several prestack depth migration techniques[J]. Geophysical and Geochemical Exploration, 2011,35(6):798-803.
Zhao L Z, Feng X K, Zu Y F , et al. Applied research of complex near-surface velocity in the depth migration[J]. Progress in Geophysics, 2018,33(3):1176-1183.
Cai C G, Chen Y . Amplitude preserving prestack split-step Fourier depth migration for complex subsurface structures[J]. Geological Science and Technology Information, 2018,37(6):195-201.
Yang G Q, Li H Z, Xu W C , et al. A stable scalar wave equation for reverse-time migration in TI media[J]. Geophysical and Geochemical Exploration, 2016,40(6):1237-1243.
Gao H Q, Xu Y, Shao W C , et al. Application of reverse-time migration technology in imaging of fractures and cavities in carbonate reservoirs[J]. China Petroleum Exploration, 2017,22(1):99-105.
Li J L, Qu Y M, Liu J X , et al. A model study of three-dimensional viscoacoustic least-squares reverse time migration[J]. Geophysical and Geochemical Exploration, 2018,42(5):1013-1025.
Wu J Z . An approach of prestack time migration in dip angle domain[J]. Geophysical and Geoch-emical Exploration, 2017,41(4):700-706.
[13]
Liu J C, Xie X B, Chen B , et al. Reverse time migration and amplitude correction in the angle domain based on Poynting vector[J]. Applied Geophysics, 2017,14(4):505-516.
Duan P F, Cheng J B, Chen A P , et al. Local angle domain Gaussian beam prestack depth migration in a TI medium[J]. Chinese Journal of Geophysics, 2013,56(12):4206-4214.
Cai J X . Method and application of Gaussian beam velocity tomography based on azimuth-reflection angle domain common imaging gathers[J]. Geophysical and Geochemical Exploration, 2018,42(5):977-989.
Fang Y, Wen T M, Li H , et al. Application of mult-azimuth grid tomographic imaging technology[J]. Computing Techniques for Geophysical and Geochemical Exploration, 2016,38(5):677-680.
Liu X W, Liu Z Y, Ning J R , et al. Full azimuth subsurface local angle domain imaging anisotropy characterization for shale gas reservoir[J]. Progress in Geophysics, 2015,30(2):853-857.
Cao T, Wang Y B . Full azimuth imaging and prestack inversion for fractured reservoirs prediction and the application[J]. Science Technology and Engineering, 2016,16(34):1671-1815.