高温高压油气藏水淹层测井评价研究

Study on logging evaluation for water-flooding layer in high temperature and high pressure oil and gas reservoir

油田在注水开发时期,随着时间的推移,油层水淹程度越来越高,在这种情况下,正确判断油层水淹程度和确定剩余油饱和度及其空间分布是地球物理测井解释工作的重要任务,是设计和优化注水开发调整方案的重要依据。本文应用组合方法即:在未水淹油层,用以导电效率理论为基础的饱和度计算公式;而水淹油层或油水同层用阿尔奇公式计算含水饱和度,以此来更准确的判别水淹层,得到较好的效果。

during the water-flooding development period of the oilfield,longer the developing time was,higher the oil reservoir was watered out.At this situation,how to correctly judge the watered out degree of the oil reservoir,determine the residual oil saturation of oil reservoir and its spatial distribution were not only the important tasks when geophysical well logging interpretation was done but also the key basis for designing or optimizing the water-flooding development adjustment schemes.One new method was used in this article： saturation calculation formula based on the conductive efficiency should be used when about the end of the watered out period,while computing the water cut by archie formula at watered out oil reservoir or oil-water layer was more effective,based on these formulas,it was better when judging if the oil reservoir was watered out.