抄録
As a core approach for the efficient development of tight oil and gas, shale gas, and coalbed methane, volumetric stimulation technology has become a critical technological foundation supporting global energy transition and strategic resource security. This paper systematically reviews the evolution of volumetric stimulation theory, from early two-dimensional fracture propagation models to the development and refinement of the complex fracture network theory, revealing the coupled control mechanisms of geological structure, in-situ stress distribution, and fluid–rock interactions across multiple scales on fracture evolution. At the engineering level, it summarizes the formation and application of efficient stimulation technologies such as optimized staged fracturing design, temporary plugging and diversion fracturing, and simultaneous fracturing, while evaluating recent advances in fracture network characterization techniques, including microseismic monitoring, distributed fiber-optic sensing, and tracer-based inversion. Furthermore, this paper focuses on the scientific issues and technical challenges associated with emerging directions such as deep and ultra-deep reservoir stimulation, non-aqueous fracturing fluid systems, intelligent fracturing operations, and AI-driven decision support. It is argued that future development of volumetric stimulation technologies will be driven by “geology–engineering integration” and “data-driven intelligent optimization,” promoting high-efficiency, low-carbon, and sustainable unconventional oil and gas development. Through a systematic review of theoretical evolution, engineering innovation, and frontier trends, this paper aims to provide strategic insights and practical references for advancing scientific research and technological innovation in the field of volumetric stimulation for unconventional oil and gas.
