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储层特征和损害机理研究表明，先天不足和极大的损害潜力在川西裂缝性致密砂岩气藏中得到集中体现。经过十几年不懈探索，川西致密气层保护与改造技术获得重大突破，基本形成过平衡水基工作液体系的配套工艺技术系列。实践进一步明确了致密气地层损害控制的三个原则：①气层保护与气层改造并举；②气层保护以裂缝为重点，兼顾基块；③以效益为中心，实现三个有利于。为适应川西致密气藏立体勘探开发形势，提出要逐步形成适合于不同压力系统、不同井眼轨迹、不同流体体系的配套技术系列。指出现阶段要在完善过平衡水基工作液体系基础上，发展“火攻气层”技术，与现行过平衡水基体系相结合。气体类工作流体及配套工艺技术将成为下一世纪致密气开发的主导技术，应不失时机地做好技术储备。强调必须用非常规的地质和工程技术思路，解决非常规致密砂岩气藏中的关键问题
Reservoir characteristics and damage mechanism studies show that the inherent deficiencies and great potential for damage in the tight fractured sandstone gas reservoirs in western Sichuan have been concentrated expression. After more than 10 years of unremitting exploration, a major breakthrough has been made in the protection and transformation of tight gas reservoirs in western Sichuan, basically forming a series of supporting technologies for balancing water-based working fluid systems. The practice further clarifies the three principles for the control of the tight gas formation damage: (1) the simultaneous protection of gas layers and the reconstruction of gas layers; (2) the protection of gas layers with cracks as the key points and the foundation blocks; (3) the benefit is the center and the three benefits are achieved. In order to adapt to the situation of three-dimensional exploration and development of tight gas reservoirs in western Sichuan, the paper proposes to gradually form a series of supporting technologies suitable for different pressure systems, different borehole trajectories and different fluid systems. It is pointed out that on the basis of perfecting the overbalanced water-based working fluid system at this stage, the technology of “fire attack gas layer” should be developed in combination with the existing balanced water-based system. Gas-type working fluid and supporting technology will become the leading technology for the development of tight gas in the next century, and should seize the opportune moment to make good technical reserves. Emphasizing the importance of using unconventional geological and engineering techniques to solve key problems in unconventional tight sandstone gas reservoirs