| 无固相弱凝胶钻井液在水井施工中的应用 |
| 投稿时间：2016-08-19 修订日期：2016-09-02 点此下载全文 |
| 引用本文：吴跃钢,徐菁.无固相弱凝胶钻井液在水井施工中的应用[J].钻探工程,2016,43(10):261-264.WU Yue-gang,XU Jing. Application of Solid-free Weak Gel Drilling Fluid in Water Well Construction[J]. Drilling Engineering, 2016,43(10):261-264. |
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| 中文摘要:结合水井施工实例，开展了对无固相弱凝胶钻井液及生物酶破胶剂的应用研究。弱凝胶钻井液具有独特的流变性，动塑比高、低剪切速率粘度高，有很好的携砂能力，除具备冷却钻头、清除孔底岩屑、护壁防坍功能外，还具有无固相，不易堵塞地层孔隙，减少钻井液中固相对含水层的伤害的特点。加入生物酶破胶剂后，能清除在井壁形成的泥皮，疏通水流通道，取得了单井出水量和渗透系数有较大增加的应用效果，对在水井施工中加强含水层的保护提供了新的方法。 |
| 中文关键词:Wuhan Jinrailway Foundation Engineering Co., Ltd. |
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| Application of Solid-free Weak Gel Drilling Fluid in Water Well Construction |
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| Abstract:Combined with water well construction, the application researches on solid-free weak gel drilling fluid and enzyme breaker fluid were carried out. The weak gel drilling fluid has unique rheological characteristics, high yield point-plastic viscosity ratio (YP/PV), high low-shear rate viscosity (LSRV) and strong sand carrying capacity. In addition to cooling drill bit, clearing rock cuttings in bottom of the hole and protecting borehole wall, another advantage of this drilling fluid is solid free, so that it is not easy to clog the formation pores, and it reduces aquifer damagecaused by the solids in drilling fluid. If enzyme gel breaking agent is added to drilling fluid, it helps to clear out the filtrate cake in the well and dredge water channels in the formation and achieve better single-well yield and permeability coefficient, which provides a new method for strengthening aquifer protection in the well construction. |
| keywords:solid-free weak gel drilling fluid water well construction enzyme gel breaking aquifer protection |
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