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为了提高地震反演预测的分辨率和可信度,提出了线性反演与非线性反演二者相结合的反演方法——以稀疏脉冲反演结果为约束背景的基于模拟退火的反演方法,阐述了基于模拟退火法的反演机理,并以X油田某区为例,开展了基于模拟退火地球物理反演预测,从反演分辨率、可信度和误差三个方面进行分析和定量研究.结果表明,非线性的随机反演与线性反演相结合有效地提高了反演分辨率,纵向上能够精细到单砂体级,反演结果多个概率的实现最大程度上降低反演的多解性,并且,反演结果的精度较高,2m以上砂岩反演符合率均在90%以上.
In order to improve the resolution and reliability of seismic inversion prediction, an inversion method based on linear inversion and nonlinear inversion is proposed, which is based on simulated annealing inversion with sparse pulse inversion as constrained background Method, the inversion mechanism based on simulated annealing method is expounded. Taking a certain area of X oilfield as an example, the geophysical inversion prediction based on simulated annealing is carried out. The inversion resolution, reliability and error are analyzed from three aspects The results show that the combination of nonlinear stochastic inversion and linear inversion can effectively improve the resolution of inversion and can be finely tuned to the single sand body in the vertical direction and the multiple probabilities of the inversion result can be reduced to the maximum extent And the accuracy of inversion results is high. The coincidence rates of sandstone retrieval above 2m are above 90%.