梯子崖-富子岭矿区复杂地层钻探技术问题与对策

Drilling Technical Problems and Countermeasures in the Complex Formations of Tiziya-Fuziling

摘要:

陕西省凤县梯子崖-富子岭铅锌多金属矿区，其地层主要为产状较陡的千枚岩，局部含方解石或石英脉，断层破碎带发育，井壁稳定性差，施工中孔斜严重，许多钻孔因孔斜而达不到设计目的，防斜、治斜和泥浆护壁为该矿区施工方面的主要技术难题。文章从孔斜预防、定向造斜、护壁堵漏等方面介绍了所采取的工艺措施和取得的效果。

Abstract:

The formations are mainly of steep occurrence of phyllite in Tiziya-Fuziling lead-zinc polymetallic ore area, locally containing calcite or quartz veins with fault fracture zone development and poor wall stability, the design requirements could not be met because of common severe drilling hole bending. The hole deviation prevention, deviation correction and slurry protection are the major construction technical problems in this mining area. This paper introduces the technical measures taken in hole deviation prevention, directional deflection, wall protection and plugging, as well as the results achieved.