摘要
过套管电阻率测井 (TCRL)是电法测井的一个新领域。根据KaufmanA提出的传输线方程 ,导出了优化的地层视电导率公式 ;相对于地层 ,钢套管的电阻率很低 ,也就是说 ,钢套管相对于地层是短路的 ,由趋肤效应可以确定TCRL的工作频率 ;在详细分析了水泥环、套管对测量结果的影响的基础上 ,提出了消除这些影响的一些方法 ,从而使过套管电阻率测井方法更趋完善。
Through Casing Resistivity Logging(TCRL)is a new field in the electric logging.According to the transmission line equation which was put forward by Kaufman,we deduced the optimum formula of apparent conductivity of formation:σ f=K S ΔU/U;The resistivity of steel casing is much lower than that of formation,that is to say,the casing is a short circult to formation.We can decide the working frequency of TCRL according to the skin depth phenomenon;Having analysed the influence of casing and cement on measurement in detail,we put forward some methods to eliminate the influence.Our study made the TCRL method perfect.
出处
《断块油气田》
CAS
2002年第5期72-75,共4页
Fault-Block Oil & Gas Field
