摘要
以前基于传输线模型分析套管井水泥环影响时,一般假设水泥环是均匀规则分布的,但实际往往是不规则分布。基于传输线数值算法,模拟和分析了不规则水泥环的过套管电阻率测井响应。研究表明:不规则水泥环对地层视电阻率测量结果会有较大的影响;高阻水泥环会引起明显的测量误差;水泥环厚度变化对地层视电阻率也有明显影响,特别是对低阻地层的影响,且理论上对高阻地层视电阻率的影响也不可忽略。
The cement was assumed to be uniform distribution when the cement sheath affection in cased well was analyzed with the transmission line model,but actually it was distributed irregularly.Through casing resistivity logging response of irregular cement sheath was analyzed based on the transmission line numerical algorithm.The result shows that the irregular cement sheath has higher influences on the formation resistivity measurement.The higher resistance cement and the deeper the thickness of the cement sheath would cause more error for measurement,especially in the low resistant strata,which could not be ignored in the case of influencing the apparent resistance of high resistant strata.
出处
《石油天然气学报》
CAS
CSCD
2013年第5期75-78,3,共4页
Journal of Oil and Gas Technology
基金
国家自然科学基金项目(40774073)
关键词
套管井
地层电阻率
测井
水泥环
传输线方程
cased hole
formation resistivity
logging
cement sheath
transmission line equation
