3D Real-Time Automatic Magnetic-Guided Technology for Directional Well to Hit Target Accurately
【Abstract】 Currently, the accuracy of basic magnetic parameters is not high in China’s magnetic guided drilling process. The drilling trajectory from the inaccurate wellhead leads to considerable errors in the 2D and 3D process. As a result, course deviation happens frequently. Based on high-precision magnetic surveys and geological development in the oil fields in the past 17 years, the article elaborates the necessity to provide high-precision and high- density magnetic survey for accurate target-hitting drilling service in China’s oil fields. The 3D magnetic databank for the underground drilling region is built on the basis of the geomagnetic Gauss theory and the surface magnetic survey, with the obsolete oil wells and magnetic boundaries of the oil field’s underground drilling region as the constraint conditions. The computer 3D imaging technology is used for real-time visualization of drilling operation to provide a new way for drilling machines to be automatically-guided and obstacle-evading. In the opinion of the author, magnetic and geological guide technology integrated into MWD is a perfect assembly for drilling of directional well. The theory and methods as well as successful application are of creative progress in China’s magnetic guided drilling sector.
【Key words】 3D magnetic guiding drilling technology； visualized drilling technology； underground patrolling obstacle evading；
- 【文献出处】 石油科技论坛 ,Oil Forum , 编辑部邮箱 ,2012年06期