【摘要】 随着我国对煤层气勘探开发的重视,煤层气储层的研究也越来越重要,特别是对煤层气储层内部结构特征的精细描述和刻画,以及对煤储层的含气性和渗透性预测,已成为研究的热点问题。由于煤层气藏自身所具有的独特特征,使得常规物理勘探方法难以对煤层气储层进行有效的研究,而地震技术则显示出其巨大优势。如利用地震技术解释煤储层构造;地震属性分析的方法研究薄煤层厚度;叠前AVO反演技术、叠前弹性阻抗(EI)反演技术和叠后波阻抗(AI)反演技术对煤储层含气性的预测;叠前方位AVO反演技术和地震反射层的曲率属性分析技术对煤储层渗透性的预测。经研究及实践表明,地震技术在煤储层研究中的效果明显。更多还原

【Abstract】 As China is focusing on CBM,it is becoming more and more important to research CBM-reservoir,particularly in the aspects of fine description of internal reservoir and prediction of gas-bearing properties and permeability.Due to unique characteristics of CBM-reservoir,conventional physical exploration is not very effective;however,the seismic techniques reveal a huge advantage.For example,seismic interprets the structure of CBM-reservoir and can tell the thickness of thin coal beds,and predict gas-bearing properties of CBM-reservoir by means of pre-stack AVO conversion,pre-stack elastic impedance(EI) conversion,and post-stack acoustic impedance(AI) conversion,and predict permeability of CBM-reservoir by means of pre-stack direction AVO conversion and analyze curvature properties of seismic reflection stratum.The research results indicate that seismic techniques applied to CBM reservoirs have an obvious effect.更多还原