钻孔超声波洗井技术试验分析

为了解决传统的水力清洗、机械清洗以及化学试剂清洗等耗时长、成本高、操作工艺复杂的局限性。借鉴超声波清洗技术在众多清洗领域（如油气田的解堵、提高采收率）取得的良好的效果，试图将其应用于水文地质勘探钻孔清洗并分析其可行性。通过分析超声波特性，利用野外钻孔砂岩取心实物室内建立了真实试验钻孔岩心清洗模型和真实砂岩小钻孔2种试验模型针对不同岩性的含水层，模拟钻井液对岩心的污染，采用不同的清洗方法对比研究分析其对渗透率、孔隙度的恢复及清洗效果。研究表明超声波对不同的岩性清洗效果较好，该洗井技术可以应用于水文钻孔洗井。

Experimental analysis of drilling ultrasonic washing technique

In order to solve the limitations of traditional hydraulic cleaning，mechanical cleaning and chemical reagent cleaning，such as time-consuming，high cost and complex operation process.Referring to the good results of ultrasonic cleaning technology in many cleaning fields，such as plugging removal in oil and gas fields and enhancing oil recovery，this paper attempted to apply it to drilling hole cleaning in hydrogeological exploration and to analyze its feasibility.Based on the analysis of the characteristics of ultrasonic wave，the core cleaning model of real test boreholes and two testing models of real small boreholes of sandstone were established in the physical laboratory of field boreholes.According to the different lithological aquifers，the pollution of drilling fluid to the core was simulated.Recovery and cleaning effect of the permeability and porosity were comparatively studied and analyzed by different cleaning methods.The research showed that the effect of ultrasonic wave on different lithology cleaning was better，and this technology can be used as well washing technology in hydrological drilling and well washing with broad application prospects.