大港歧北斜坡沙二段和沙三段模型指导下薄互层储层预测及效果

Effect and Prediction of Thin Interbedded Reservoir Under the Guidance of The Es2 and Es3 Mode in The North Slope of Qikou of Dagang

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。

Es2 and Es3 in the north slope of Qikou sag are controlled by many source sedimentary systems.Various types of sand body,including long shore bar,braid river deltas,fan deltas,slope fan,near shore subaqueous fans etc.,are developed in this area.Sand bodies are characterized by thin layer,short extending and thin interbedding structure.Different sedimentary types of reservoir have large differences in geological characteristics and complex geophysical response characteristics,and it is difficult to predict reservoir by seismic data.Under the guidance of geological law and forward-inversion modeling,based on the reservoir geophysical characteristics analysis,this paper states reservoir prediction of isochronous stratigraphic framework constrained scroll,section fine inversion and implementation effect.The result provides significant evidence for the exploration of lithologic reservoirs and the discovery of hundred million tons of reserves.