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

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。

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 efficien- cy, good coring sample quality and short coring time. This paper mainly introduced the successful application of large-diam- eter wire-line coring barrel in a CBM parameter well and production well of Hebi. Based on the structure features of the se- lected coring tool and according to the thick soft coal seam conditions, the reasonable drilling parameters and technical in- surance measures were summed up with good effects.