摘要
研究了利用电阻率、孔隙度、自然电位和中子伽马等综合测井资料求水淹油层剩余油饱和度的方法。利用专利技术“用普通取心测试资料求水淹油层饱和度的方法”，对５６５块岩样的含油饱和度分析值进行计算处理，计算出剩余油饱和度，并以此为标准检验和标定测井解释剩余油饱和度结果，测井解释值和岩心分析值的平均绝对误差为２．３％，说明经标定后的测井解释剩余油饱和度更加准确可靠。用这种方法解释胜坨油田１４口井５７个单层，再与试油结果对比，符合４９层，总符合率为８６％。用此方法和处理软件对胜坨油田二区２－２－Ｇ１８井区３０口井的测井资料和２０多年的生产资料进行解释并建立数据库，构制油藏剩余油饱和度的时空变化图，在不同方向进行切片，还绘制了三维立体图，描述不同时期剩余油饱和度的变化状况，这种动态描述与同期的生产资料吻合。
An approach to determine remaining oil saturation in waterflooded reservoirs by using comprehensive log data of resistivity,porosity,spontaneous potential and neutron capture gamma ray is presented.A patent technology——a method to calculate oil saturation of watrflooded reservoirs from common coring test data is used to process oil saturation data of 565 rock samples.Remaining oil saturations are calculated and used as standards of inspection and calibration of those from log interpretation.2%￣3% of average absolute error between log interpretation and core analysis indicates that calibrated log interpretation data of remaining oil saturation are more accurate and reliable.Interpretation results of 57 layers of 14 wells in Shengtuo oilfield with this method are compared with well test results.49 layers are in agreement and that means a percentage of 86% in total.Log data of 30 wells in 2 2 G18 wellblock,area 2,Shengtuo oilfield and production information in more than 20 years are analyzed and a database is built. Making a time space plot of remaining oil saturation and intersecting it in different directions,a three dimensional plot is drawed and used for the description of remaining oil saturation changes in different period of time.This kind of description agrees with production data of the same time.
关键词
剩余油饱和度
测井解释
油藏描述
油田开发
remaining oil saturation,log interpretation,reservoir description
