耐磨集成测井电极优化设计

Optimization Design of a Wear-Resistant Integrated Logging Electrode

针对目前测井电极因受井壁磕碰、冲蚀等恶劣条件下长时间使用造成绝缘性下降、测量失效,不能满足大位移水平井“一趟钻”技术攻关需求,对测井电极的失效原因进行了总结与分析。灌封钢陶瓷的绝缘体在钻井液冲蚀等工况条件下弱化分子间结合力,与金属结合面的粘结强度下降导致泥浆渗入,绝缘性下降导致测量方位电阻率失效。进行材料和结构优化后,新型耐磨集成测井电极具有耐磨性、高密封性、电路集成等特点,有效提高测井电极的使用寿命。耐磨集成测井电极技术作为长寿命近钻头地质导向钻井系统的配套技术,实现大位移水平井“一趟钻”技术要求。在新疆油田、东北各大油田及海外油田,使用井达100多口井,为开采非常规油气资源效益开发提供技术保障。

Due to harsh conditions such as collision and erosion of the borehole,the insulation of the button electrode has degraded over time,resulting in measurement failures and an inability to meet the technical requirements of"one trip drilling"for large displacement horizontal wells.This paper provides a preliminary summary and analysis of the reasons for button electrode failure.It is concluded that the insulation of the encapsulated steel-ceramic weakens the intermolecular bonding force under operating conditions such as drilling fluid erosion,reduces the bond strength of the metal interface,and leads to mud infiltration.The reduction in insulation leads to failure of the azimuth resistivity measurement.This article optimized the material selection and structure to effectively improve the sealing and insulation properties of button electrodes,and after field testing and verification,meeting the requirements for a single drlling application in large displacement horizontal wells,and providing technical support for the development of unconventional oil and gas resources using near bit drilling instruments.