抑制性泥浆在新疆淖毛湖煤田东部勘查区中的应用

Application of Inhibitive Drilling Fluid in the Eastern Exploration Area of Naomaohu Coalfield in Xinjiang

摘要:

新疆淖毛湖煤田东部勘查区，煤系地层多为灰色、淡黄色砾岩、砂岩，泥岩，泥岩与砂砾岩互层，泥岩夹煤层、煤线等，其中泥岩、泥岩与砂砾岩互层地层水敏性强，胶结性差，在钻进过程中易造成水化膨胀、缩径、坍塌等问题，护壁困难。针对该矿区的地层特征，采用抑制性无固相和低固相泥浆钻进，成功地维持了孔壁稳定，高效、安全地完成了钻孔，为今后施工类似钻孔取得了宝贵经验。

Abstract:

The coal-bearing strata are mostly gray and yellowish conglomerate, sandstone, mudstone, mudstone and glutenite interbedded, mudstone intercalated coal seam or coal line in the eastern exploration area of Naomaohu coalfield in Xinjiang, among which, strata of mudstone, mudstone and glutenite interbedded have strong water sensitivity, poor cementation and are easy to cause hydrated swell, shrinkage and wall collapse in the drilling process, wall protection is difficult. In view of the characteristics of the mine strata, the inhibitory solid free and low solid drilling fluid are used, the borehole stability is kept and effective and safe drilling is realized.