琼东南盆地深水区亮点型气藏时频差异属性分析应用研究
Application of Time-Frequency Difference Attribute Analysis of Bright Spot Type Gas Reservoir in Deep-Water Qiongdongnan Basin
受深水区探井少、不同流体AVO类型相近影响,利用常规P(拟合截距)、G(拟合梯度)、P×G、P+G等衍生烃类检测属性已不能有效识别深水区储层的流体性质,亟需寻找适合该区有效储层的烃类检测方法. 实际上,地震波在地下地层传播过程中会产生明显的吸收衰减现象,通过含气砂岩会产生低频增加现象,因此联合谱分解和AVO技术是解决深水烃类检测的有效途径. 利用时频属性的峰值振幅和平均振幅,提出了能更好地描述流体性质变化的差异属性,可以增强深水区含气性识别的敏感度,在深水浊积岩储层烃类检测中取得良好的应用效果,有效降低深水区烃类检测的多解性.
琼东南盆地 / 深水浊积岩 / AVO分析 / 时频分析 / 时频差异属性 / 石油地质
Qiongdongnan Basin / deep-water turbidity / AVO analysis / time and frequency analysis / time-frequency difference attribute / petroleum geology
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十四五重大专项“南海北部深水区勘探关键技术”(KJGG2022-0104)
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