【摘要】 随着煤层气、页岩气等非常规油气的兴起,相干属性解释技术在三维地震解释中也越来越重要。文章详细介绍了相干属性的基本原理,并对沁水盆地实际的三维地震资料进行计算,通过对计算结果的分析与比对,准确地判断了区域内断层的走向和分布,确定了裂缝发育的区块以及陷落柱的位置。另外还得到了基于特征值的C3算法对断层、裂缝、隆起、凹陷等构造非常灵敏,且干扰很小,尤其对断层的连续性、横向延展程度识别度高,而且对断层的聚焦程度也很高,但C3算法运算量非常大,对计算机的要求很高。总之,利用相干属性的解释结果,能够精确判断断层、裂缝和陷落柱等地质构造在区域内的分布特征,从而为区域内煤层气勘探开发提供可靠的依据,特别是保证了钻井选址的准确性。更多还原

【Abstract】 With the rise of coal-bed methane, shale gas and other unconventional oil and gas, coherence attributes interpretation technology has become increasingly important in 3D seismic interpretation. This paper introduces the basic principles of coherence attributes, calculates the actual 3D seismic data of Qinshui Basin, by the analysis and comparison of calculation results, accurately determines the direction and distribution of faults within the region and the fracture development block and the location of collapse column,also gets that the C3 algorithm based on eigenvalues is very sensitive for faults, cracks, bumps, dents and other structure, and interference is very small, especially has a high degree of recognition of the continuity and lateral extension of the fault, but the computation of C3 algorithm is very large, so it has very high requirements for computers. In short, the use of interpretation results of coherence attributes can accurately determine the distribution of geological structure in the region, like faults, fractures and subsided column, and can provide a reliable basis for coal-bed methane exploration and development in the region, in particular to ensure the accuracy of the drilling site.更多还原