煤层气勘探井井斜原因分析及预防措施

在煤层气勘探井钻井中，经常发生井斜超标的现象，给后期钻井施工及煤层气抽排采带来许多不利影响，严重的还可能导致井眼报废。为此，分析造成井斜的主要原因，采取切实可行的预防井斜技术措施，对于提高钻井效率和工程质量，有效降低钻井成本，加快煤层气勘探开发有重要意义。结合煤层气钻井施工实践，就发生井斜的主要原因进行了简要分析，并提出了具体应对措施。

Causes Analysis on Coal Bed Gas Exploration Well Slanting and the Preventive Measures

In the coal bed was mad in the vertical shaft well drilling, has the well slanting exceeding the allowed figure phenomenon frequently,Pulls out the platoon for the later period well drilling construction and the coal bed gas to pick brings many adverse effects, serious also possibly causes the bore hole abandonment. Therefore, the analysis creates the well slanting primary causAbstract: In the coal bed gas exploration well drilling, the well slanting exceeding occurs frequently, which has adverse effects for the coal bed gas extraction, drainage and collection in later period, even can lead the bore hole abandonment. Therefore, the analysis on the primary causes of well slanting and taking the practical technical measures to prevent well slanting are important to improve drilling efficiency and engineering quality, reduce drilling cost and speed up coal bed gas exploration development. Combined with the coal bed gas drilling practice, the primary causes of well slanting are briefly analyzed and the concrete preventive measures are put forward.