基于鬼波压制的宽频反演在莺歌海盆地储层预测中的应用

Application of reservoir prediction in Yinggehai Basin based on broadband inversion of deghosting

莺歌海盆地高温高压气藏为非经典坡折带重力流沉积体系,砂体展布及接触关系十分复杂,基于常规地震资料的储层预测技术无法达到准确刻画砂体的目的.为此,针对研究区地质特征,开展模型正演分析,论证了宽频反演相对于常规反演在储层预测方面的优势.并利用τ-p域拖缆鬼波压制技术对常规三维地震资料进行鬼波压制,得到宽频地震资料,提高了地震资料分辨率.最后基于宽频地震资料开展叠前宽频反演,得到高精度储层预测结果,在实际应用中取得了良好的效果.

Yinggehai Basin of high-temperature and high pressure gas reservoir is an unclassical slop break belt system of gravity flow deposit.Distribution and contact relationship of sand bodies is very complicated.The resolution of conventional 3D seismic data exiting is low,and the reservoir prediction techniques can't reach the purpose of accurate characterization of the sand bodies.Therefore,we demonstrate the advantages of broadband inversion relative conventional inversion in reservoir prediction by forward modeling based on the geological features of the study area.And acquire the broadband seismic data which the resolution is improved by the technology of deghosting towed streamer data inτ-p domain.At last,we acquisition high precision results of reservoir prediction and achieved good effect in practical application by prestack broadband inversion based on broadband seismic data.