Qu Zhang Jing'an Oilfield Chang 2 A Distribution Of The Remaining Oil And The Corresponding Measures

In the process of flood development of bottom water reservoir, oil well has short water breakthrough period and short oil production with low water content, because of both injected water and bottom water. This causes a series of problems,such as:bottom water coning and oil-water interface rising. After entering the high-water-cut period, Because reservoir structure and fluid property and fluid distribution change, It is increasingly difficult to monitor and describe the remaining oil with the existing technology.Zhangqu First Area of Jing’ An Oilfield, is a typical bottom water reservoir. Its oil-bearing area is13.4km2and Its producing reserves is933×104t. Now,Its oil recovery rate comes to0.25%and Its recovery percent of reserves reaches5.05%. As development goes deep, It is in the period of high water content for Zhangqu First Area,and present integral water content is up to88.6%,but Its recovery ratio is only5.30%. The oil wells whose water content is more than80%account for79percent of total oil wells. There are two main problems in the development:First, It is difficult to determine the distribution range and the amount of the remaining oil, because of the poor physical properties and the more barrier layers and interlayers and reservoir rhythm. Second, It is difficult to increase well yield and lower the water cut by Adjusting water injection.To solve the above problems of Zhangqu First Area, First, I got the trend of the distribution of the remaining oil in Chang2layer by fitting the gross and single well output,water cut and pressure in Numerical simulation way. Second, I describe the remaining oil quantitatively by improving the technology of quantitative description of the remaining oil. Then I analyse the potential and make a comprehensive study on the matching potential tapping measures. These findings will support the oil delopment powerfully in the future.