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深孔岩心钻探问题探讨
引用本文:张培丰.深孔岩心钻探问题探讨[J].探矿工程,2011,38(8):6-11.
作者姓名:张培丰
作者单位:北京探矿工程研究所,北京100083
摘    要:深孔岩心钻探的核心问题是孔壁稳定,其钻前预测涉及地层孔隙压力、地层应力、地层坍塌压力和破裂压力,是实现深孔岩心钻探优质、安全、高效和低成本的关键,决定着孔身结构、套管程序与套管强度、钻井液密度与流变性能的设计。以孔壁稳定为基础,从孔身结构和套管程序、钻具组合、钻探设备方面论述深孔岩心钻探存在的问题,并提出具体的改进建议。

关 键 词:深孔岩心钻探  孔壁稳定  钻具组合  钻探设备
收稿时间:2011/1/7 0:00:00
修稿时间:2011/8/13 0:00:00

Analysis on Deep-hole Geological Core Drilling
ZHANG Pei-feng.Analysis on Deep-hole Geological Core Drilling[J].Exploration Engineering(Drilling & Tunneling),2011,38(8):6-11.
Authors:ZHANG Pei-feng
Institution:ZHANG Pei-feng(Beijing Institute of Exploration Engineering,Beijing 100083,China)
Abstract:The hole-wall stability is one of the focuses of deep-hole geological core drilling.The accurate prediction of formation pore pressure,in-situ stress state,formation collapses pressure and fracture pressure before drilling are vital to conduct quality,safe,efficient and low-cost drilling.These are the design basis of the hole-wall structure,casing program and strength,density and rheological properties of drilling fluids.Based on the hole-wall stability,discussion is made on the existing problems of hole-wall structure,casing program,drilling tool assembly,drilling equipment in deep-hole geological core drilling and suggestions are put forward for the improvement.
Keywords:deep-hole geological core drilling  hole-wall stability  drilling tool assembly  drilling equipment
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