随着非常规油气越来越受到关注，以二氧化碳（CO 2）压裂技术为代表的无水压裂技术在非常规油气资源开发中的应用具有广阔的前景。CO 2压裂技术具有多个优点，例如损害小，易于回流。它特别适用于显示低压，低渗透性和强水敏感性的复杂岩石地层。而且，该技术对含水量低，污染严重的油藏有积极的影响。本文研究了不同CO 2的相关文献从技术原理，工艺流程，技术特点，压裂液体系，现场应用等方面对压裂技术进行了分析，并对压裂的产生与扩展进行了总结。结果表明，CO 2压裂比常规水力压裂更能有效地激发非常规油藏，具有较高的技术可行性，可在今后的储层增产改造中应用。本文探讨了如何进一步提高压裂液的黏度，提高压裂液的携砂能力，降低管道摩擦力。

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As unconventional oil and gas have increasingly gained considerable attention, the application of water-free fracturing technology represented by carbon dioxide (CO2) fracturing technology in unconventional oil and gas resources development has broad prospects. The CO2 fracturing technology has several advantages, such as low damage and easy flowback. It is especially suitable for complex rock strata exhibiting low pressure, low permeability, and strong water sensitivity. Moreover, this technology positively affects the reservoir with low water content and experiencing serious pollution. In this paper, the related literature of the different CO2 fracturing technologies from the aspects of technical principle and technological process, technical characteristics, fracturing fluid system, and field application is analyzed, the fracture initiation and propagation are summarized as well. The results indicate that CO2 fracturing can stimulate unconventional reservoirs more effectively than the conventional hydraulic fracturing, exhibits high technical feasibility, and can be applied in the reservoir stimulation and reconstruction in the future. In this paper, how to further improve the viscosity of fracturing fluid, enhance the sand-carrying capacity of fracturing fluid, and reduce the pipeline friction is determined.