Research and application of electric pulse resonance stimulation technology for unconventional reservoir
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摘要: 为了提高非常规油气的产量，解决非常规油气储层改善的难题，对储层的电脉冲共振技术进行研究，利用电脉冲激励源作为敲击锤实现对储层固有频率的检测，通过对电压电流环的控制实现放电频率的快速准确调节。研发了可用于现场施工作业的非常规储层共振增产装置样机，形成了初步的施工作业流程，完成了山西五口煤层气井的现场实验。实验结果表明电脉冲冲击波的有效作用范围可达400～500 m，对储层裂缝改善效果明显，应用前景十分广阔。Abstract: To increase the production of unconventional oil and gas fields, the electric pulse resonance technology of reservoir was studied. The natural frequency of the reservoir was detected by electric pulse, and the discharge frequency was adjusted quickly and accurately by voltage and current loop. A prototype of the resonance stimulation device was developed for field operation, a preliminary construction process was formed, and field experiments were carried out. The results show that the impact range of the shock wave can reach 400−500 m, and the improvement effect of the reservoir fracture is obvious. The application prospect of the device is very broad.
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图 7 水中单次脉冲放电电压、电流波形图
Figure 7. Typical waveform of voltage and current of pulse discharge in water
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