地矿钻探井漏特点及复合堵漏技术  

Characteristics of Borehole Losses During Drilling and Composite Plugging Technology

作　　者：毛洪江[1,2] 

机构地区：[1]成都理工大学,四川成都610059 [2]四川省冶金地质勘查局606大队,四川彭州611930

出　　处：《地质与勘探》2011年第4期686-691,共6页Geology and Exploration

基　　金：国土资源部四川省九龙县里伍铜矿接替资源勘查(编号:2008510022)资助

摘　　要：分析了地质情况所引起的渗透性漏失、中微裂缝性漏失、大裂缝溶洞性漏失和破裂性裂缝漏失的特点,研究了水化膨胀复合材料体系的膨胀性、复合桥接堵漏模拟实验及矿场试验,实验结果表明,堵漏材料PAR具有很强的吸水膨胀性能,可膨胀至原体积的几十倍,且时间快,有利于形成快速的封堵,材料PAR与稻谷和锯木形成的复合堵漏材料在承压堵漏测量装置中表明体系不仅能形成封堵而且能够承受一定的压差,通过现场5口井试验说明复合堵漏技术能够满足地矿钻探的现场需求。This paper analyzes the characteristics of borehole losses during drilling caused by varied geological conditions such as leakage, intermedi- ate and tiny fissures, large karst caves leakage and ruptured cracks. Then it evaluates the dilation property of the hydration expansion composite material system and the plugging effect of the composite bridge sealing method from the modeling and mine experiments. The results show that plugging material PAR has a highly absorbent property and can be expanded to several times the original size and can form the plugging quickly. The experiment using the apparatus for measurements of confined pressure shows that the composite materials made up of PAR, paddy and sawdust can generate plugging bear some pressure difference.. Through on-site tests of 5 wells, it is concluded that the composite plugging technology can meet the needs of geological drilling.

关 键 词：井漏特点 堵漏技术 复合材料 现场运用 

分 类 号：TD-05[矿业工程] TD80