Research On Wellbore Trajectory Control Method And Application Based On Geo-steering Drilling

Wellbore trajectory control is the important segment in drilling technology and the classical research content in drilling engineering. However, wellbore trajectory control is a multi-disturbance procedure that is almost impossible for complete coincidence between real drilling trajectory and planned course. Meanwhile, geo-steering drilling technology generates relevantly which is characterized to locate and control wellbore trajectory with the actual geological features. Geo-steering drilling technology is the key elements for wellbore trajectory predict and control in a series of exceptional technological well, for example, directional, horizontal, extended reach well, at the same time geo-steering drilling will decline the difficulty of drilling , enhances drilling rate, ensures success and decreases drilling cost.But, Geo-steering drilling is a complex system because of the complexity and uncertainty. So we will aim deficiency at data analysis, handling, interpretation, presentment and decision in order to solve the practical problems and conquer the conventional limitation in the article, a method is provided to make full use of comprehensive information in geo-steering drilling. The method is used to service geo-steering drilling and enhance control accuracy and ensure steering tool drill in reservoir accurately. Firstly, geo-steering drilling parameters database is established which is based on Xujiaweizi drilling engineering information, then steering ability forecasting models are established which are based on modified three points determined a circle of different steering tools, and then wellbore trajectory parameters forecasting models are established according to natural curve method. Real drilling data of Xujiaweizi area are calculated using above models, results are analyzed, we use monitoring and diagnosing while drilling technology to direct geo-steering drilling and finish predication and control of wellbore trajectory. Research on wellbore trajectory control based on geo-steering drilling is provided to solve the practical problems in drilling engineering and the research has significant value in the academic study and engineering application.