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鄂尔多斯盆地LD地区为典型的黄土塬地貌,其砂体规模小、横向变化大、埋藏深、厚度薄、储层致密.以高保真地震分偏移距叠加资料为基础,在岩石物理分析的指导下,创新探索引入了几项关键叠前技术:球面波反射AVO分析技术研究山1段大偏移距道集AVO特征;叠前角度域中分析地震资料吸收规律,精度相对较高,能分辨5m储层;引入果蝇优化算法构建虚拟井,解决叠前同时反演过程中缺少横波测井问题.这几项黄土塬叠前关键技术为LD地区深层致密气勘探取得新进展发挥了重要作用.
The Ordos Basin LD area is a typical loess plateau with small scale and large horizontal variation, deep burial, thin thickness and dense reservoirs. Based on the superimposed data of high fidelity seismic offsets, in the guidance of petrophysical analysis , Innovative exploration introduced several key prestack technologies: the AVO analysis of spherical wave reflections to study the AVO features of the large offset 1 gathers in the mountains; the analysis of seismic data absorption laws in the prestack angle domain with relatively high accuracy and resolution 5m reservoirs.The fruit flies optimization algorithm was introduced to construct the virtual well to solve the problem of the absence of transverse wave logging in the process of prestack inversion.These key technologies of the loess plateau have played an important role in making new progresses in deep tight gas exploration in LD area .