地震微相分析技术——以某深水油田海底扇朵叶体为例

Seismic microfacies analysis technique: A case study of lobes of submarine fan in a deep water oilfield

在无井或少井的深水区开展沉积微相分析,通常面临着岩心资料少、无露头、井距过大等困难。为了解决这些问题,需要利用井震结合的方法,精细研究地震反射特征,建立地震微相与沉积微相的关系,指导沉积微相研究,预测有利储层分布范围。以西非某深水油田海底扇朵叶体为研究对象,通过正演模拟方法确定不同沉积微相的地震响应特征,结合井震标定结果,建立了海底扇朵叶体三种不同沉积微相的地震微相模式,提出了井位部署建议。该方法对于少井深水油田朵叶体预测具有一定的指导意义。

The sedimentary microfacies analysis in the deep water with no or less wells is often confronted with the difficulty of low core data, no outcrop, and excessive well spacing.In order to solve these problems, it is necessary to use well-log and seismic data method and detailed seismic reflection characteristics and establish the relationship between seismic microfacies and sedimentary microfacies so as to guide sedimentary microfacies study and predict favorable reservoir distribution.Based on lobes of submarine fan in a deep water oilfield of West Africa, the authors established a microfacies model of three different sedimentary mierofacies of the lobes of submarine fan by using the forward method of the seismic response characteristics of the different sedimentary microfacies.The well location suggestion is put forward,and this method is proved to have guiding significance for prediction of lobes of submarine fan in deep water oilfield with less wells.