摘要:
河流相储层的废弃河道微相,在侧向上对流体起隔挡作用。在油田深度开发阶段,是储层平面非均质性精细描述的关键、平面剩余油的重要影响因素。本文综合现代沉积、露头调查,描述其几何形态和规模,建立其概念模式。利用密井网测井曲线,阐述其平面和剖面上的分布特征、识别方法,建立了大庆油田泛滥平原废弃河道微相的静态模式。以该方法为基础,在进行储层综合预测和剩余油分析、发现高效井中成效显著。
关键词:
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河流相 /
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废弃河道 /
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微相 /
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精细描述 /
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大庆油田
Abstract:
The abandoned channel micro facies of fluvial reservoir blocks the fluid in the lateral. During the stage of further development, this kind of micro facies is the key to the detailed description of the areal heterogeneity in reservoir and the important factor which influences the lateral remaining, oil. Three facies belts which are channel stone, interchannel stone and interchannel silt are subdivided in the reservoir description of complex meander belt stone body previously. Which is hard to identify and subdivide the abandoned river micro facies. With the more knowledge of background and characteristics of modern fluvial sedimentary, especially at the stage of further development, the average well interval of Daqing oilfield is 200～300 meter, some of that is 100 meter even. Based on the abundant data of close well logging, the identification and detail description of micro facies of complex meander belt are authentic established. This article combined modern sedimentary, output investigation with the description of channel geometry and scale to set up the conceptual model of abandoned channel facies. By using well logging curves under close well spacing, this paper interpreted the distribution character, the recognition method of channel facies on the areal and profile, and established a static model for the abandoned channel facies on flooding plain in Daqing Oilfield. Based on this method, the comprehensive prediction of reservoir and the analysis of remaining oil have been conducted. This method has a notable result in high efficiency wells.
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