Abstract：With the deepening of oil and gas field development,seismic data interpretation and structural mapping accuracy requirements are also increasing.Especially in complex surface,underground complex and steep dip formation regions,high-precision velocity field must be established with variable velocity mapping to obtain a fine structure diagram and fine implementation of construction.However,in the complex structure area,it is difficult to get an accurate structural model with the conventional velocity models,because speed change is very big also in the vertical and horizontal direction.Based on the study of currently used velocity modeling techniques for complex area,the authors put forward the technical method about seismic and logging constrained 3D velocity model that takes full advantage of unified corrected wells velocity,seismic velocity spectrum and other information and,combined with layers control action,finally uses the time depth conversion to realize the structural mapping.Research on the technology for the construction of onshore Gabon Zone salt has achieved good results.
张珺. 加蓬盐下复杂构造区井控高精度变速成图的方法研究[J]. 物探与化探, 2017, 41(3): 535-541.
ZHANG Jun. A study of the method of well controlled high precision variable velocity mapping in the subsalt complex structure area of Gabon. Geophysical and Geochemical Exploration, 2017, 41(3): 535-541.
