论文详情
从谱反演基本原理出发,推导出多层稀疏反射系数目标函数,利用基追踪交替方向法(Alternating Direction Method,ADM)谱反演算法求取高精度反射系数,与谱模拟解析法提取的宽频子波褶积重构,得到保持低频信息的高分辨率剖面,利用改进型特征值相干体算法对此剖面进行裂缝预测。理论测试和实际资料应用结果表明,ADM谱反演高分辨率技术能得到极性、位置准确性较高的反射系数,而重构后的宽频剖面分辨率明显提高、同相轴连续性更好、断点更清晰、断层更明了,相干体切片精度更高、细节刻画更清晰,可作为裂缝预测的重要技术手段。
How to obtain the high resolution data volume and high precision coherence slices have been the key research issues in the exploration of fractured reservoirs.Therefore,the application of high resolution fracture prediction technology based on Alternating Direction Method(ADM) spectrum inversion is studied.From the basic principle of spectral inversion,the target function of the multi-layer sparse reflection coefficient is derived.The high precision reflection coefficient is obtained with the ADM spectrum inversion of basis pursuit algorithm.The high resolution section with the low frequency information is reconstructed by the convolution of the high precision reflection coefficient with the broadband zero phase wavelet extracted from spectrum simulation analytical method.The fracture prediction for this high resolution section using the improved eigenvalue algorithm is conducted.The theoretical experiments and actual data 〖JP2〗application tests show that fracture prediction technology based on ADM spectrum inversion can get the reflection coefficient with the accurate polarity and position as an important technique for the fracture prediction.The reconstructed broadband sections are characterized by higher resolution,better continuous events and more clear breakpoints,and the coherent body slice has higher accuracy with fine reservoir characterization.
中国石油天然气集团公司科学研究与技术开发项目(2013E-38-08)资助。