Hydraulic fracturing technology is an important means of shale gas development, and microseismic monitoring is the key technology of fracturing effect evaluation. In this study, hydraulic fracturing and microseismic monitoring were simultaneously conducted in the Eyangye 2HF well (hereinafter referred to as EYY2HF well). The target stratum of this well is the second member of the Doushantuo Formation of the Sinian System, which is the oldest stratum of horizontal shale gas wells in the world. A total of 4341 microseismic fracturing events were identified, and 23 fracturing stages of the well were defined. The fluctuation of the number of events showed a repeating “high-low” pattern, and the average energy of these events showed minimal differences. These findings indicate that the water pressure required for the reconstruction of the EYY2HF well is appropriate. The main body of the fracture network extended from northwest to southeast, consistent with the interpretation of regional geological and seismic data. The stimulated rock volumes showed a linear increase with the increase of the fracturing stage. Some technological measures, such as quick lift displacement, quick lift sand ratio, and pump stop for secondary sand addition, were adopted during fracturing to increase the complexity of the fracture network. Microseismic fracture monitoring of the well achieved expected effects and guided real-time fracturing operations and fracturing effect evaluation.

水力压裂技术是页岩气开发的重要手段，微震监测是评价压裂效果的关键技术。在这项研究中，在Eyangye 2HF井（以下简称EYY2HF井）中同时进行了水力压裂和微震监测。该井的目标地层是震旦系斗山uo陀组的第二层，它是世界上最古老的水平页岩气井地层。总共确定了4341个微地震压裂事件，并定义了该井的23个压裂阶段。事件数量的波动显示出重复的“高-低”模式，这些事件的平均能量显示出最小的差异。这些发现表明，重建EYY2HF井所需的水压是合适的。裂缝网络的主体从西北向东南延伸，与区域地质和地震数据的解释一致。受激岩石体积随压裂阶段的增加呈线性增加。在压裂过程中采取了一些技术措施，如快速举升位移，快速举升砂比和二次加砂的停泵措施，以增加裂缝网络的复杂性。良好的微震裂缝监测可达到预期效果，并指导实时压裂作业和压裂效果评估。与区域地质和地震数据的解释一致。受激岩石体积随压裂阶段的增加呈线性增加。在压裂过程中采取了一些技术措施，如快速举升位移，快速举升砂比和二次加砂的停泵措施，以增加裂缝网络的复杂性。良好的微震裂缝监测可达到预期效果，并指导实时压裂作业和压裂效果评估。与区域地质和地震数据的解释一致。受激岩石体积随压裂阶段的增加呈线性增加。在压裂过程中采取了一些技术措施，如快速举升位移，快速举升砂比和二次加砂的停泵措施，以增加裂缝网络的复杂性。良好的微震裂缝监测可达到预期效果，并指导实时压裂作业和压裂效果评估。在压裂过程中采用了增加裂缝网络复杂性的方法。良好的微震裂缝监测可达到预期效果，并指导实时压裂作业和压裂效果评估。在压裂过程中采用了增加裂缝网络复杂性的方法。良好的微震裂缝监测可达到预期效果，并指导实时压裂作业和压裂效果评估。