基于自适应正则化叠前宽角度反演致密砂岩优势储层预测

砂岩储层与非储层之间密度差异小,传统基于Aki-Richards近似公式的叠前密度反演结果精度低,对优势储层预测存在困难。将精确Zoeppritz方程直接带入广义线性反演理论框架,推导宽角度叠前反演公式,突破近似公式大角度误差大的缺点,利用大角度叠前地震信息,同时引入自适应正则化约束,提高了反演结果的精度,应用该方法大大提高了油层识别能力及预测精度。

The density difference between sandstone reservoirs and non-reservoirs is small,which causes the traditional pre-stack inversion method that based on Aki-Richards equation cannot satisfy the reservoir prediction task.We substitute the Zoeppritz equation into general inversion frame and then deduct adaptive regularization prestack wide-angle inversion formula.Our inversion formula overcomes the weakness of Aki-Richards equation which cannot apply the wide angle information accurately.In this case,the inversion accuracy is improved.the method improving the reservoir identification ability and prediction accuracy.