【摘要】 塔中气田以往以"串珠"作为钻探目标,早期取得了一定的效果,但在气田开发中发现"串珠"并不是含气储层的主要特征,需要对塔中气田鹰山组储层分布规律重新认识。研究认为,鹰山组受差异溶蚀和走滑断层分割双重因素控制,储层在地震剖面上表现为"层状",平面上为"块状"分布特点,而不是呈孤立分布的"串珠"。鹰山组气层、水层在常规地震剖面上振幅差异小,传统的"亮点"技术无法对含气储层有效识别。通过实际测井资料进行多参数交会分析和AVO模型正演说明,泊松比为鹰山组储层含气性最敏感的弹性参数,气层地震反射属于第三AVO类型,用AVO近远道表征和主振幅主频率地震预测技术可以有效预测鹰山组气层,在研究区见到很好的效果,并得到了钻井的证实。更多还原

【Abstract】 Taking"Beads"as exploration objects,Tazhong gas field achieved some effects.With the development of exploitation,we found that"Beads"are not the main features of gas reservoirs,and"Beads"are fewer and fewer.We need to recognize the distribution regularities of gas reservoirs to seek the effective prediction methods.This paper shows that,Tazhong area has been uplifting after the sedimentation of Yingshan Formation,which is influenced by the interaction of differential corrosion and segmentation of strikeslip faults,resulting in the strong heterogeneity of reservoir distribution and the complexity of gas-water distribution.Despite the Yingshan reservoir has complicated distribution and strong anisotropy,through the logging data analysis we found the most sensitive pre-elastic parameters of Yingshan gas reservoirsPoisson’s ratio.AVO modeling shows Yingshan gas reservoirs have three types of AVO abnormal.That means the"Near-Far AVO characterization"and the"Major amplitude & Major frequencies"can predicate the gas reservoir and increase the drilling rate.It is significant in the carbonate exploitation.更多还原