在地质钻探实践中，复杂地层钻孔护孔及堵漏作业是重中之重，如复杂地层组钻孔及护孔质量不高，会制约影响到地质钻探的效率。针对复杂地层的护孔作业，较为常用的是岩芯钻探中的泥浆护孔方案，借助于泥浆护孔和化学冲洗液的结合，可以有效突破及解决复杂地层中易发的涌水、膨胀、坍塌等问题。本文结合相关案例，探究复杂地层中岩芯钻探的护孔工艺方案。%Complex formation drilling hole protection and plugging is a top priority in the geological drilling practice. If the complex formation hole drilling and protection quality is poor, it will affect the efficiency of geological drilling. For complex formation hole operation, the commonly used solution is mud protection in core drilling, which can effectively solve the problems like water burst, expansion and collapse in complex formation by mud hole protection and chemical washing fluid. Combined with related cases, this article explores the core drilling hole protection solution in complex formation.
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