Based on a study on the reservoirs deposited in deep water in Niger delta, a new method to detect directly deep water reservoirs, 2DWRI, was presented. From the princples of deep water sedimentation and seismic prospecting, the intension and feasibility of 2DWRI were elaborated. According to the characteristics of seismic reflection, it was proposed to apply two indicators, the strength and geometric shape of reflection on seismic sections, to i-dentify the deep water sedimentary bodies, by which the deep water sedimentary bodies in Niger delta were divided into four types. In the light of the difference between the two indicators, different seismic attributes and their combinations were used to i-dentify these types of deep water sedimentary body and refinedly depict their space configuration. On a basis of these researches, the reservoir development and petrophysics were qualitatively analyzed for the different types of deep water sedimentary body, and a deep water sedimentation model was built in Niger delta, by integrating the electrical characteristics of the bodies and following the deep water sedimentolo-gy. This method is simple, practical, rapid and effective, and has got better application results in the actual hydrocarbon exploration and evaluation.%基于尼日尔三角洲深水沉积储层研究,提出了深水沉积储层直接预测新方法——2DWRI.从深水沉积和地震勘探原理角度对该方法的内涵和可行性进行了阐述,根据地震反射特征提出了利用地震剖面上的地震反射强度和反射几何外形两大指标识别深水沉积体,并据此将尼日尔三角洲深水沉积体划分为4种类型；根据深水沉积体识别指标的差异,分别采用不同地震属性及其组合识别这4类深水沉积体并精细刻画了其空间形态；在上述研究的基础上,结合不同深水沉积体的岩电特征,在相关深水沉积学指导下,定性分析了不同类型深水沉积体的储层发育状况与物性特征,建立了尼日尔三角洲深水沉积模式.该方法简单实用、快捷有效,在实际油气勘探评价中取得了较好的应用效果.
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