摘要
高含水期油藏与中低含水期油藏相比，剩余油的分布发生了显著变化，呈现高度分散、局部富集的特点，常规的剩余油潜力分布定量化表征方法在高含水期不再适用。考虑到剩余油分流能力与含水饱和度之间显著的非线性关系，提出了适用于高含水期油藏剩余油潜力分布定量化表征的新概念——优势潜力丰度。分析了胜坨油田坨七断块顶部油藏沙二段8—10砂层组高含水期剩余油优势潜力分布规律，在剩余油可采储量丰度基本相同的情况下，不同部位的优势潜力丰度最大相差达10倍，有效地突出了剩余油优势潜力部位，明确了剩余油的挖潜方向。
In contrast with moderate or low water cut oil reservoirs, the distribution features of remaining oil have changed a lot in high water cut oil reservoirs, which exhibits high dispersion and local enrichment. Traditional method for quantitative characterization on the remaining oil potential has not been applicable. As we all know, distributary ability of the remaining oil has a nonlinear relation with oil saturation. Thus a new method is presented for quantitative characterization on the remaining oil potential in high water cut oil reservoirs, which is called abundance of predominant remaining oil. The remarkable differences of the abundance of predominant remaining oil up to 10 times have been found among the different areas in 8-10 sand groups of Tuo7 block reservoir in Shengli Oilfield although their abundance of recoverable remaining oil reserves is approximately the same. This method can demonstrate the areas of the predominant remaining oil efficiently and make clear the target of the remaining oil tapping potential.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2007年第6期100-102,共3页
Petroleum Geology and Recovery Efficiency
基金
中石油石油科技中青年创新基金资助项目"高含水期油藏大孔道动态变化机理与识别模型"(04E7029)
关键词
高含水期
剩余油
分流能力
相对渗透率
优势潜力丰度
high water cut period, remaining oil, distributary ability, relative permeability, abundance of predominant potential
