琼东南盆地BD 13区中新统三亚组一段地震异常体具有异常范围比构造范围大的特点,且具备良好的油气成藏地质条件,可能属于构造背景之下的岩性圈闭成藏。为了确定该地震异常体的含气规模,利用拟声波地震反演和频谱成像技术联合预测了该套储层,初步搞清了砂体厚度及平面展布特征,在此基础上,利用AVO、AVD、DR及衰减梯度等烃类检测技术进行了储层检测,并应用衰减梯度多信息融合技术预测了砂体含气规模,结果表明,BD 13区三亚组地震异常体含气规模较大,应具有良好的勘探前景。

In BD 13 area,Qiongdongnan basin,South China Sea,Seismic anomaly body of Sanya formation I Section with wider abnormal range than structure size,which may be a gas-bearing lithologic trap formed under a structural background,has good conditions for hydrocarbon accumulation.To determine the potential gas resource,seismic inversion on pseudo-sonic curve combined with spectrum imaging techniques were used to preliminarily predict reservoir thickness and lateral distribution;on the basis of above work,AVO,AVD.