多层系油田剩余油分布研究新方法

摘要

剩余油分布的量化指标主要包括剩余油饱和度、可动剩余油饱和度、剩余油储量丰度、可动剩余储量丰度、含水率、采出程度、水淹程度、剩余油潜力分级等参数.为准确表征油水间相互干扰造成的流动能力降低,体现实际油藏中不同层系、不同部位流体的流动能力,提出了两相流导流系数.将导流系数应用于XX油田,综合运用地质、油藏动态分析手段和油藏数值模拟技术研究剩余油分布规律,对比讨论了两相流导流系数与优势储量丰度定量描述剩余油分布规律,验证了新方法的优越性.新方法为研究剩余油的分布、动用价值及挖潜提供了依据.%The quantitative indexes of remained oil distribution mainly include oil saturation, mobile oil saturation, reserves abundance, mobile reserves abundance, water cut, produced degree of reserve recovery, flooded level, potential levels and so on. In order to exactly characterize the reduced flowability resulted from the mutual interference between oil and water and furthermore to display the liquidity of different series and part flows in actual oil reservoirs , two-phase perveance is presented innovatively. When the perveance, applied in XX Oilfield through combining geology, dynamic analyzing method for oil reservoir performances and numerical simulation technique, the laws of remained oil distribution are studied and moreover the laws are quantitatively characterized with the help of contrasting and discussing two-phase perveance and preferential reserves abundance, finally the superiority of the method has been verified. The novel approach has presented evidences for remained oil distribution, its developed value and potential tapping countermeasures.