| Horizontal well geological steering technology is the core means to improve the drilling encounter rate of oil and gas reservoirs. With the continuous advancement of unconventional oil and gas exploration and development while drilling, its complex geological conditions have put forward higher requirements for the accuracy and adaptability of geological steering technology. By clarifying the principle and key technologies of geological guidance in horizontal Wells, the research identified the difficulties in geological guidance for unconventional oil and gas horizontal Wells, and expounded the research progress and prospects of geological guidance technology. The results show that the geological guidance process of unconventional oil and gas horizontal Wells consists of four major links: data acquisition, model analysis, real-time decision-making and execution feedback. There are geological engineering difficulties such as unstable equipment in high-temperature and high-pressure environments, lagging real-time data acquisition and transmission, strong reservoir heterogeneity and difficulty in identifying "sweet spots", and limited dynamic control of wellbore trajectories. In recent years, the geological guidance technology for unconventional oil and gas horizontal Wells has made remarkable progress in aspects such as the construction of an integrated geological engineering platform, innovation in high-precision 3D modeling technology, downhole high-speed transmission and high-temperature resistant equipment, differentiated guidance strategies for unconventional reservoirs, and integrated and intelligent working modes. With the improvement of technical levels and the expansion of application scenarios, The application prospects of geological navigation technology for unconventional oil and gas horizontal Wells are broad. The above research results provide important references and lessons for the in-depth application of horizontal well geological guidance technology in the exploration and development of unconventional oil and gas. |
