To improve the accuracy of inversion results, geological facies distributions are considered as additional constraints in the inversion process. However, the geological facies itself also has its own uncertainty. In this paper, the initial sedimentary facies maps are obtained by integrated geological analysis from well data, seismic attributes, and deterministic inversion results. Then the first iteration of facies-constrained seismic inversion is performed. According to that result and other data such as geological information, the facies distribution can be updated using cluster analysis. The next round of facies-constrained inversion can then be performed. This process will be repeated until the facies inconsistency or error before and after the inversion is minimized. It forms a new iterative facies-constrained seismic inversion technique. Compared with conventional facies-constrained seismic inversion, the proposed method not only can reduces the non-uniqueness of seismic inversion results but also can improves its resolution. As a consequence, the sedimentary facies will be more consistent with the geology. A practical application demonstrated that the superposition relationship of sand bodies could be better delineated based on this new seismic inversion technique. The result highly increases the understanding of reservoir connectivity and its accuracy, which can be used to guide further development.

为了提高反演结果的准确性，地质相分布被认为是反演过程中的附加约束。但是，地质相本身也有其自身的不确定性。本文通过综合地质分析，从井眼数据，地震属性和确定性反演结果中获得了初始沉积相图。然后，进行了相约束地震反演的第一次迭代。根据该结果和其他数据（例如地质信息），可以使用聚类分析来更新相分布。然后可以进行下一轮相约束的反演。重复此过程，直到最小化反转前后的相不一致或错误为止。它形成了一种新的迭代相约束的地震反演技术。与传统的相约束地震反演方法相比，该方法不仅可以减少地震反演结果的非唯一性，而且可以提高其分辨率。结果，沉积相将与地质更加一致。实际应用表明，采用这种新的地震反演技术可以更好地描述砂体的叠置关系。结果大大提高了对油藏连通性及其准确性的认识，可用于指导进一步的开发。实际应用表明，采用这种新的地震反演技术可以更好地描述砂体的叠置关系。结果大大提高了对油藏连通性及其准确性的认识，可用于指导进一步的开发。实际应用表明，采用这种新的地震反演技术可以更好地描述砂体的叠置关系。结果极大地提高了对油藏连通性及其准确性的认识，可用于指导进一步的开发。