地震相干技术的发展及在碳酸盐岩裂缝型储层预测中的应用

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.

Improvement of the Coherency Technique and Its Application in Carbonate Fracture Reservoirs

The advancement of the coherence technology experienced three generations, the first generation arithmetic based on the theory of cross correlation, the second generation arithmetic based on the multi-trace similarity theory, and the third generation arithmetic based on the theory of the matrix character structures. We predicted the fractures hidden in the carbonate rocks in the TZ83 area using the coherence technologies, and proved that the coherence cube computed using the third generation arithmetic from the same seismic data can depict the fractures more objective and more fine, improving the lateral resolution.