摘要
韩清忠等：用常规电阻率测井资料确定水淹层的剩余油饱和度，测井技术，１９９６（５）２０，３５１～３５５。油田综合含水越来越高，利用电阻率测井资料确定地层的剩余油饱和度变得非常困难。针对这一问题，提出了确定地层水电阻率和含油饱和度的方法。①利用已知的地层水分析资料，采用井下自然电位刻度，井间对比和双自然电位方法来求准地层水混合液电阻率，然后利用相邻井相同地层的电阻率对比方法求含水饱和度。②利用电阻率的横向探测特性，避开阿尔奇公式中ｍ、ａ选择上的困难，采用横向法计算水淹层目前的含水饱和度。利用以上方法处理几十口水淹油井的测井资料，得出比较满意的结果。
It becomes more and more difficult to determine residual oil saturation of flooded formation from conventional resistivity logging data due to the high watercut and the salinity variations of formation water. For determining resistivity of formation water and residual oil saturation, two new methods have been introduced herein: ①On the basis of known formation water analysis data, SP downhole calibration, well to well correlation and dual SP techniques are used to determine current resistivity of the mixture of connate water and injected water, and then, water saturation can be obtained with resistivity correlation between the same formation of neighboring wells; ②Current water saturation of the flooded formation can be derived by the ratio method proposed to avoid the difficulties in determining the accurate value of formation factors m and a . Logging data from tens of wells in flooded strata have been processed with the above methods, which showed promising results.
出处
《测井技术》
CAS
CSCD
1996年第5期351-355,共5页
Well Logging Technology
关键词
含油饱和度
水淹
测井解释
数据处理
oil saturation watered out logging interpretation data processing formation water resistivity
