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非常规油气储层体积压裂是油气开采的主要技术手段,准确地描述缝网压裂裂缝的演化规律是研究体积压裂的核心问题,运用声发射信号参数特征定义了岩体损伤变量,基于能量守恒原理,建立压裂岩体破裂与裂缝演化的折迭突变模型.通过选取吉林德惠菜园子页岩岩心开展了相关研究,理论计算与室内试验结果表明,岩体压裂具有突变破裂行为特征,理论计算结果与室内试验结果吻合较好.为后续裂缝演化研究奠定了科学基础.
The volumetric fracturing of unconventional oil and gas reservoirs is the main technical means of oil and gas exploration. Accurately describing the evolution law of fracture fractures is the core issue of volumetric fracturing. The damage parameters of rock mass are defined by the parameters of acoustic emission signals. Energy conservation principle to establish a fracture mutation model of fracture and fracture evolution of fractured rocks.Relevant studies have been carried out by selecting the core of shale in Dehui, Jilin Province. Theoretical calculations and laboratory tests show that the fractures of rock mass have a sudden rupture behavior The results of the theoretical and experimental results are in good agreement with those of the laboratory test, which lays a scientific foundation for the subsequent study on the evolution of fractures.