By reviewing the development history of stimulation techniques for deep/ultra-deep oil and gas reservoirs, the new progress in this field in China and abroad has been summed up, including deeper understanding on formation mechanisms of fracture network in deep/ultra-deep oil and gas reservoir, performance improvement of fracturing fluid materials, fine stratification of ultra-deep vertical wells, and mature staged multi-cluster fracturing technique for ultra-deep and highly deviated wells/horizontal wells. In light of the exploration and development trend of ultra-deep oil and gas reservoirs in China, the requirements and technical difficulties in ultra-deep oil and gas reservoir stimulation are discussed: (1) The research and application of integrated geological engineering technology is difficult. (2) The requirements on fracturing materials for stimulation are high. (3) It is difficult to further improve the production in vertical profile of the ultra-deep and hugely thick reservoirs. (4) The requirements on tools and supporting high-pressure equipment on the ground for stimulation are high. (5) It is difficult to achieve efficient stimulation of ultra-deep, high-temperature and high-pressure wells. (6) It is difficult to monitor directly the reservoir stimulation and evaluate the stimulation effect accurately after stimulation. In line with the complex geological characteristics of ultra-deep oil and gas reservoirs in China, seven technical development directions are proposed: (1) To establish systematic new techniques for basic research and evaluation experiments; (2) to strengthen geological research and improve the operational mechanism of integrating geological research and engineering operation; (3) to develop high-efficiency fracturing materials for ultra-deep reservoirs; (4) to research separated layer fracturing technology for ultra-deep and hugely thick reservoirs; (5) to explore fracture-control stimulation technology for ultra-deep horizontal well; (6) to develop direct monitoring technology for hydraulic fractures in ultra-deep oil and gas reservoirs; (7) to develop downhole fracturing tools with high temperature and high pressure tolerance and supporting wellhead equipment able to withstand high pressure.

通过回顾深，超深层油气藏增产技术的发展历史，总结了国内外在该领域的新进展，包括对深，超深层裂缝网形成机理的深入理解。油气藏，压裂液材料性能改进，超深垂直井精细分层，超深，高度偏斜井/水平井的成熟多段压裂技术。针对我国超深层油气藏勘探开发的趋势，探讨了超深层油气藏增产的要求和技术难点：（1）综合地质工程技术的研究和应用困难。 。（2）对增产压裂材料的要求很高。（3）难以进一步提高超深超厚储层垂向剖面的产量。（4）对地面刺激工具和配套高压设备的要求很高。（5）难以实现对超深，高温，高压井的有效增产。（6）增产后难以直接监测储层的增产和准确评价增产效果。针对我国超深层油气藏复杂的地质特征，提出了七个技术发展方向：（1）建立系统的基础研究和评价实验新技术；（二）加强地质研究，完善地质研究与工程运行相结合的运行机制；（3）开发用于超深层储层的高效压裂材料；（4）研究超深超厚储层的分层压裂技术；（5）探索超深水平井压裂增产技术；（6）开发超深层油气藏水力裂缝的直接监测技术；（7）开发耐高温高压的井下压裂工具，并支撑能承受高压的井口设备。（4）研究超深超厚储层的分层压裂技术；（5）探索超深水平井压裂增产技术；（6）开发超深层油气藏水力裂缝的直接监测技术；（7）开发耐高温高压的井下压裂工具，并支撑能承受高压的井口设备。（4）研究超深超厚储层的分层压裂技术；（5）探索超深水平井压裂增产技术；（6）开发超深层油气藏水力裂缝的直接监测技术；（7）开发耐高温高压的井下压裂工具，并支撑能承受高压的井口设备。