贵州页岩气班竹1井钻进施工实践

Drilling Construction Practice of Shale Gas Banzhu Well 1

摘要:

页岩气是清洁、高效新能源，其勘察钻进施工技术要求较以往地勘钻进施工有一定的变化，主要体现在需要取出的岩心直径较大，所以其终孔口径要大，故设备动力选择较同等深度的地质勘察钻孔要大一二个级别；另外，由于气测录井需要冲洗液作为介质，因此对冲洗液添加剂有影响气测的限制要求；还有安全管理要求具有防范有毒有害气体和预防火灾事故的措施。钻遇软、碎地层时，适时调整钻进参数是确保岩心采取率的有效措施之一，把好安装质量关、严禁钻具带“病”下入孔内和遵守绳索取心钻进操作规范，是确保本钻井施工质量的关键。

Abstract:

Shale gas is an invaluable clean and efficient new energy in the 21 century; the requirements on its exploration drilling construction technology have certain changes than they were before. The final hole diameter is large because of the larger core diameter, and the equipment driving power should be one or two levels higher than that for those geological survey holes of the same depth. Besides, flushing fluid is needed in gas logging as a medium, so there are limitations of affecting gas logging for flushing fluid; and measures to prevent poisonous & harmful gases and fire accident are also required for safety management. Timely adjustment of drilling parameters is one of the effective measures to ensure the core recovery rate in soft and broken formations. Good installation quality, good drilling tool conditions and complying with operation norm of wire-line core drilling are very important to ensure the quality of drilling construction.