Well-seismic joint complex structure velocity modeling method based on structure constraint

The invention discloses a well-seismic joint complex structure velocity modeling method based on structure constraints, which is applied to the field of seismic data processing and interpretation and aims at the condition that a velocity model is not consistent with a structure and is not consistent with a sedimentary mode in a medium with a complex structure in the prior art. The method comprises the steps of firstly extracting low-frequency information of a seismic velocity model as a background field, then performing structural modeling according to structural interpretation data, analyzing a sedimentary mode, and adding the information as constraints into a velocity correction process. And finally, an initial velocity model which is finer and more in line with geological structure and sedimentary characteristics is obtained. 本发明公开一种基于构造约束的井震联合复杂构造速度建模方法，应用于地震资料处理、解释领域，针对现有技术存在构造复杂的介质中仍存在速度模型与构造不符、与沉积模式不符的情况；本发明首先提取地震速度模型的低频信息作为背景场，然后根据构造解释数据进行构造建模，分析沉积模式，并将这些信息作为约束添加到速度校正的过程中。最后得到了更为精细、更符合地质构造和沉积特征的初始速度模型