水平井防砂容易形成卡管柱的现象,不易后期处理.通过对可钻型滤砂管外套、管材、胶结剂的选择与性能研究,研制出一种新型可钻的防砂工具.该工具将滤砂管防砂管柱的中心管、滤砂器、本体等均设计成可钻铣或可化学降解的材料,可以在其防砂失效后,通过钻头将其钻碎,将碎块冲出即可进行下一步作业,从而解决了防砂失效后难处理的问题.现场应用4口水平井,在1年内平均日增液33.8t,日增油3.9t,取得了显著的效果.该滤砂管挡砂精度可达0.07～0.13mm,井口产液含砂量小于0.05％,且砂粒粒径小于0.07mm,措施前后同期对比,产量稍有增加,满足了防砂要求.%At present, column sticking happens frequently during sand control process in horizontal wells and is very difficult to handle post processing. A new type drillable sand control implement has been developed by selecting materials and researching properties of drillable filter tube coats, pipes and cementing agents. All the materials used in implements including central tube, sand filter and sand control tube are designed to be drilling and milling and chemical degradation. Field application in 4 horizontal wells has launched, and the result indicates that obvious effects have been achieved with liquid increase of 33.81 per day and oil production of 3.91 every day. When the drillable filter sand tubes lose its effect, it can easily damage by bit and crash the fragments simply which followed by further treatments. Experimental results show that the sand blocking precision of this filter sand tube can up to 0.07~0.13 mm, and sand content of production liquid in wellhead is less than 0.05% with sand diameter smaller than 0.07 mm. The output rises slightly comparing before and after treatment, which can meet the requirements of sand control.
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