大口径绳索取心钻具在特厚软煤中的取心应用

Application of Large-diameter Wire-line Coring Barrel in Thick Soft Coal

摘要:

煤层气参数井因需准确获取煤层及其气体含量参数，绳索取心技术因结构简单、钻进效率高、岩矿心质量好、钻获煤心时间短等显著优点已在煤层气井取心中广泛应用。主要介绍了大口径绳索取心钻具在鹤壁六矿某煤层气参数井+生产井的应用中，根据选用大口径取心工具的结构特点，针对目的煤层为特厚软煤的客观地质条件，总结出了较为合理的取心钻进工艺参数和技术保障措施，取得了较好的效果。

Abstract:

The accurate parameters of coal seam information and the gas content are obtained in CBM parameter well. Wire-line coring technology has been widely used in CBM well coring because of its simple structure, high drilling efficiency, good coring sample quality and short coring time. This paper mainly introduced the successful application of large-diameter wire-line coring barrel in a CBM parameter well and production well of Hebi. Based on the structure features of the selected coring tool and according to the thick soft coal seam conditions, the reasonable drilling parameters and technical insurance measures were summed up with good effects.