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地震相干技术是进行裂缝型储层预测的重要手段之一,目前已发展经历了基于互相关理论的第一代相干技术,基于多道相似的第二代相干技术和基于矩阵特征结构的第三代相干技术。由于断裂、裂缝对碳酸盐岩储层有明显的改善作用,因而可以通过预测裂缝的手段从而预测裂缝型储层。应用相干技术对塔中83井区奥陶系碳酸盐岩中的断裂进行预测,对比得出在同样的地震资料条件下,基于矩阵结构相干技术能够更客观、更精细地表现研究区碳酸盐岩储层中的断裂分布,提高预测的横向分辨率,刻画断裂的展布规律。
Seismic coherence technique is one of the most important tools for fractured reservoir prediction. At present, it has undergone the first generation of coherence based on cross-correlation theory, the second generation of coherence based on multi-channel similarity and the third Generational coherent technology. Because of the fracture, the fractures have obviously improved carbonate reservoirs, so fractured reservoirs can be predicted by means of prediction of fractures. The coherence technique is used to predict the faults in the Ordovician carbonate rocks in the well of Block Tazhong 83. The results show that under the same conditions of seismic data, the matrix structure-based coherence technique can more objectively and accurately represent the carbonate The distribution of fracture in salt rock reservoirs increases the predicted lateral resolution and characterizes the distribution of faults.