东海海域深层PH组已发现油气藏并成功开发，但其储层埋深较深，砂体横向变化快，砂体展布、叠置关系复杂，分布规律不清，含气性预测困难，制约了该地区进一步精准高效开发。针对该问题，从弹性和衰减两个角度综合开展靶区含气性预测技术研究，建立面向靶区的含气性预测关键技术系列。弹性角度主要通过岩石物理分析构建敏感含气性指示因子，然后基于叠前高精度反演获取弹性参数计算该指示因子；衰减角度主要采用物探院自研的衰减梯度随角度变化（quality factor gradient varies with angle, QgVA）技术，考虑了含气储层频谱随入射角的变化梯度存在差异。最后提出了一种复合含气性敏感属性技术，有效综合流体因子和衰减属性的优势，进一步提升含气性检测识别能力。实际应用效果表明，该技术能够有效提升储层含气性预测精度，高效支撑深层PH组的勘探开发工作，并且能在类似研究区进行推广应用。

The deep PH formation in the East China Sea has discovered oil and gas reservoirs and successfully developed them, but its reservoir depth is relatively deep, the horizontal variation of sand bodies is fast, the distribution and stacking relationship of sand bodies are complex, the distribution pattern is unclear, and the prediction of gas content is difficult, which restricts further precise and efficient development in the area. To address this issue, comprehensive research on gas content prediction technology in target areas was conducted from the perspectives of elasticity and attenuation, and a key technology series for gas content prediction in target areas was established. The elastic angle was mainly constructed through rock physics analysis to determine the sensitive gas bearing indicator factor, and then the elastic parameters were obtained based on high-precision inversion before stack to calculate the indicator factor. The attenuation angle mainly adopts QgVA (quality factor gradient varies with angle) technology developed by the Geophysical Exploration Institute, taking into account the differences in the gradient of the gas bearing reservoir spectrum with the change of incident angle. Finally, a composite gas sensitive attribute technology was proposed to effectively integrate the advantages of fluid factors and attenuation attributes, further enhancing the ability of gas detection and recognition. The actual application effect shows that this technology can effectively improve the accuracy of reservoir gas content prediction, efficiently support the exploration and development work of deep PH formation, and can be promoted and applied in similar research areas.