【摘要】 生物礁是特殊的沉积体,其生长形态、发育规模通常因古地理位置及古气候环境的差异而不尽相同,由于其与围岩存在波阻抗差异,在地震反射剖面上常形成上隆、下凹、内部杂乱反射等特征,解释人员一般也通过该特征来寻找生物礁。但由于振幅异常往往受多种因素的影响,因此降低了生物礁气藏勘探的成功率。这里利用短时傅里叶变换、连续小波变换对生物礁异常体进行频谱分解,通过频降分析,与实钻情况吻合,验证了该方法的有效性。更多还原

【Abstract】 The reefs are special sediment and grow in the shallow sea environment.They are uniform in size and shapes and vary with the geologic climate and palaeogeography.Because of the acoustic wave impedance difference between the reef and wall rock,there are many features of reef in the seismic time profile such as events weakening,heaving,falling,and so on.The seismic data interpreter usually searches the reef by the features,but the abnormity of amplitude is affected by many factors,so it reduces the mission success rate of reefs exploration.This paper processes the abnormal data by spectral decomposition technology based on the short time fourier transform and continuous wavelet transform.The results are corresponding to drilling results and show the correctness and validity of this method.更多还原