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将分形技术用于地震勘探中的储层解释是一个新课题，根据分形理论在地球物理勘探中的应用原理，利用井约束地震速度分形反演技术可以提高地震资料的分辨率。文章提出了具体的井约束声波曲线速度分形反演方法和实现流程。以新疆焉耆盆地实际资料为例，利用分形理论对波阻抗曲线在实际测井曲线的约束下进行分形计算，得到一条近似的声测井曲线和一组分形参数，把这一组分形参数延拓至整个目的层段，所内插出的声波曲线和实测的声波曲线有较高的相似性，能得到较精细的声波约束分形反演剖面，其薄层分辨能力可达到5～10 m。

SEISMIC VELOCITY FRACTAL INVERSION TECHNIQUE OF WELL CONSTRAINT AND ITS APPLICATION

Geophysical signal is of fractal characteristic, so it is a new subject to apply the fractal technique to reservoir interpretation in seismic exploration. According to the application principle of fractal theory in geophysical exploration, the resolution of seismic data may be raised by use of the seismic velocity fractal inversion technique of well constraint. The concrete velocity fractal inversion method and procedure of well constrint acoustic log is put forward in the paper.By taking the actual data collected from Yanqi Basin in Xinjiang as an example, a similar acoustic curve and a group of fractal patameters were achieved through a fractal calculation of wave impedance curve under the constraint of real log according to the fractal theory. The acoustic curve interpolated by expanding the group of fractal parameters to all the target interval is very similar to the actual acoustic log, thus obtaining a fine fractal inversion section of acoustic constraint.The resolution of the inversed acoustic curve is greatly enhanced and the thin layers with thicks of 5-10 m can be well identified.