基于不规则井眼的双侧向测井正演响应规律研究

摘要

基于三维有限元数值模拟技术,建立不规则井眼物理模型,模拟井眼不规则度、井眼扩径对双侧向测井响应的影响.研究表明,井眼不规则度越大,对双侧向测井响应的影响越大,对大井眼中浅侧向测井响应的影响尤为突出,而对深侧向测井的影响较小;井眼扩径对双侧向测井响应的影响较大,双侧向响应随井眼扩径程度、扩径不规则度的增加而减小.该研究可为实际双侧向测井井眼校正工作提供理论参考.%Based on the 3 D finite element numerical simulation technique,an irregular borehole physical model was established to simulate the influence of borehole irregularity and enlargement on the dual laterolog response.The results showed that the greater the degree of borehole irregularity,the greater the effect on the lateral lateral logging response.The effect on the shallow lateral logging response in the large well was particularly pronounced,while the effect on the deep lateral logging was small.And the effect of borehole enlargement on the response of dual laterolog is large.The response of the dual laterolog decreases with the increase of the size of the borehole and the increase of the irregularity of the diameter.The research in this paper can provide a theoretical reference for borehole correction in dual laterolog.