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歧北斜坡沙二段和沙三段受多物源沉积体系控制,发育沿岸沙坝、辨状河三角洲、扇三角洲、斜坡扇、近岸水下扇等多种类型的砂体,砂体为薄互层结构,单层厚度薄、延伸短;不同沉积类型的储集体地质特征差异大,地球物理响应特征复杂,利用地震资料进行储层预测难度大。本文阐述了以地质规律、模型正反演研究为指导,在储层地球物理特征分析的基础上,通过等时地层格架约束下滚动、分段精细拟波阻抗反演的储层预测方法及实施效果。该项成果为歧北斜坡岩性油气藏的勘探与发现亿吨级规模储量提供了重要依据。
The second and the third member of Shahejie Formation in Qijibei slope are under the control of multi-source sedimentary system and develop various types of sand body such as sand bar, deltaic fan, fan delta, slope fan and nearshore subaqueous fan, The interlaminar structure is thin and stretches short. The different geological types of reservoirs have different geologic features and complex geophysical responses. It is very difficult to predict the reservoir using seismic data. In this paper, based on the analysis of geophysical characteristics of the reservoir, guided by geological laws and model forward and inversion studies, the reservoir prediction method based on the inversion of the rolling and segmented finely-quasi- Implementation Effect. This result provides an important basis for the exploration and discovery of large-scale reserves in the lignin-scale reservoirs of the northern slope of Qijie.