油藏模型网格粗化的理论与方法

摘要/Abstract

摘要： 近20 年来, 由于油藏描述与油藏模拟的需要, 人们提出了许多油藏模型网格粗化(Reservoir Upscaling) 的理论与方法。这些方法大致可归纳为5 类: 指数律平均法、重正规化技术、解压力方程法、矢量法和拟函数法。传统方法的共同点是它们倾向于抹平一些在空间分布的渗透率极值条带, 例如, 泥岩夹层和裂缝。然而, 非均质油藏的生产实践和模拟实验都表明, 这些渗透率极值条带对原油采收率, 尤其是无水采收率影响极大。因此, 在网格粗化过程中怎样处理渗透率极值条带, 怎样对天然裂缝油藏以及石灰岩油藏进行网格粗化, 是这一研究领域有待解决的挑战性问题。

关键词: 模型, 油藏模拟, 网格, 粗化

Abstract: In the past two decades, various reservoir upscaling theories and methods have been proposed for reservoir characterization and reservoir simulation. They are classified into five categories such as power-law average method, renormalization technique, pressure-solver method, vector method and pseudo-function technique. The common problem of conventional reservoir upscaling methods tends to smear out the spatially continuous permeability extremum strips like shale intercalation and fracture. However, the simulation and the practice for heterogeneous reservoirs have shown that oil recovery, especially breakthrough recovery mainly depends on the spatial connectivity of the extreme permeability values. This paper discusses how to deal with the permeability extrimum strips in the upscaling process and how to make an upscaling for natural fractured reservoir and carbonate reservoir, which are the remained major challenging problems in this area.

Key words: model, reservoir simulation, grid, upscaling

中图分类号:

TE319

祁大晟, 裴柏林. 油藏模型网格粗化的理论与方法[J]. 新疆石油地质, 2008, 29(1): 91-93.

QI Da-sheng, PEI Bai-lin. Theory and Methodology for Reservoir Upscaling[J]. Xinjiang Petroleum Geology, 2008, 29(1): 91-93.

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