考虑优势通道发育的层状水驱油藏开发指标预测方法

发布时间：2018-03-22 23:23

本文选题：层状水驱油藏　切入点：开发指标预测　出处：《油气地质与采收率》2017年04期 　论文类型：期刊论文

【摘要】：高含水期层状水驱油藏普遍发育优势通道,与常规油藏渗流特征不同,注入水在优势通道中的流动可视为高速非达西渗流,但现有的层状水驱油藏开发指标预测方法尚未考虑优势通道的影响。为此,基于油藏工程和渗流力学理论,考虑注入水在优势通道中的高速非达西渗流,推导并建立了层状水驱油藏开发指标预测方法。该方法可以计算优势通道发育的层状水驱油藏的含水率和采出程度等开发指标,定量反映优势通道渗透率和厚度对油藏开发动态的影响。实例分析表明,随着优势通道渗透率和厚度的增大,油藏层间矛盾更加突出,小层中正常储层的采出程度降低,优势通道中注水量增大,注水利用率降低,油藏整体开发效果变差。该方法准确地反映了优势通道发育的层状水驱油藏的生产特征,可用于指导该类油藏的开发调整。
[Abstract]:In high water-cut bedded water-drive reservoirs, the dominant channels are generally developed, which are different from the percolation characteristics of conventional reservoirs. The flow of injected water in the dominant channels can be regarded as high-speed non-Darcy percolation. However, the existing prediction methods for development index of layered water drive reservoir have not considered the influence of dominant channel. Therefore, based on reservoir engineering and percolation mechanics theory, the high speed non-Darcy seepage flow of injected water in dominant channel is considered. The development index prediction method of layered water drive reservoir is derived and established, which can be used to calculate the development indexes such as water cut and recovery degree of layered water drive reservoir developed with dominant channel. Quantitative analysis of the effect of permeability and thickness of dominant channel on reservoir development performance shows that with the increase of permeability and thickness of dominant channel, the contradiction between reservoir layers becomes more prominent, and the recovery degree of normal reservoir in small layer decreases. This method can accurately reflect the production characteristics of layered water drive reservoirs developed by dominant channels and can be used to guide the development and adjustment of this kind of reservoirs.
【作者单位】：中国石油大学(华东)石油工程学院;常州大学石油工程学院;中海油研究总院;
【基金】：国家科技重大专项“海上高含水期油藏大井距井网加密矢量优化与注采结构调整技术”(2016ZX05025001-006) 教育部长江学者和创新团队发展计划(IRT1294)
【分类号】：TE357.6

【相似文献】