地质学报
地質學報
지질학보
ACTA GEOLOGICA SINICA
2014年
4期
686-694
,共9页
周新鹏%项彪%邹长春%李建国%赵斌%肖昆%刘东明%侯颉%孙少伟%汪振斌%黄波%尹道谨
週新鵬%項彪%鄒長春%李建國%趙斌%肖昆%劉東明%侯頡%孫少偉%汪振斌%黃波%尹道謹
주신붕%항표%추장춘%리건국%조빈%초곤%류동명%후힐%손소위%왕진빈%황파%윤도근
南岭%多金属矿%NLSD-2孔%地球物理测井%综合研究
南嶺%多金屬礦%NLSD-2孔%地毬物理測井%綜閤研究
남령%다금속광%NLSD-2공%지구물리측정%종합연구
Nanling%polymetallic ore%the borehole NLSD-2%geophysical logging%integrated study
NLSD-2孔是在南岭东段于都赣县矿集区盘古山示范区部署的南岭地区第二口科学钻孔---金属异常验证孔，终孔深度2012．12 m，全井段实施了连续取芯和综合地球物理测井作业，测井项目包括自然电位、自然伽马、电阻率、声波速度、密度、井径、井斜、井温、超声波成像、极化率、磁化率和井中三分量磁测等，原位获取了钻孔剖面的各种物理化学参数、钻孔几何形态及井壁图像。综合利用各种测井资料，并结合岩芯编录资料，对全井段岩性、金属矿化带和断裂破碎带进行了细致分析。结果表明，自然伽马、声波速度和密度测井对该钻孔的岩性响应明显，通过制作岩性识别交会图，可识别出钻孔剖面的主要岩性；该钻孔的多金属矿化主要有白钨矿化、黑钨矿化、黄铁矿化、闪锌矿化、辉钼矿化等，在测井图中表现为高极化率、低电阻率、磁异常垂直分量ΔZ 及水平分量模差ΔH’异常的组合特征，据此能够有效地划分和评价矿化带；断裂破碎带的测井响应特征为井径扩大，电阻率、声波速度、密度减小，超声成像呈暗色条带，这些特征可作为找矿辅助标志。实践证明综合测井资料在深部找矿方面能够发挥重要的作用。
NLSD-2孔是在南嶺東段于都贛縣礦集區盤古山示範區部署的南嶺地區第二口科學鑽孔---金屬異常驗證孔，終孔深度2012．12 m，全井段實施瞭連續取芯和綜閤地毬物理測井作業，測井項目包括自然電位、自然伽馬、電阻率、聲波速度、密度、井徑、井斜、井溫、超聲波成像、極化率、磁化率和井中三分量磁測等，原位穫取瞭鑽孔剖麵的各種物理化學參數、鑽孔幾何形態及井壁圖像。綜閤利用各種測井資料，併結閤巖芯編錄資料，對全井段巖性、金屬礦化帶和斷裂破碎帶進行瞭細緻分析。結果錶明，自然伽馬、聲波速度和密度測井對該鑽孔的巖性響應明顯，通過製作巖性識彆交會圖，可識彆齣鑽孔剖麵的主要巖性；該鑽孔的多金屬礦化主要有白鎢礦化、黑鎢礦化、黃鐵礦化、閃鋅礦化、輝鉬礦化等，在測井圖中錶現為高極化率、低電阻率、磁異常垂直分量ΔZ 及水平分量模差ΔH’異常的組閤特徵，據此能夠有效地劃分和評價礦化帶；斷裂破碎帶的測井響應特徵為井徑擴大，電阻率、聲波速度、密度減小，超聲成像呈暗色條帶，這些特徵可作為找礦輔助標誌。實踐證明綜閤測井資料在深部找礦方麵能夠髮揮重要的作用。
NLSD-2공시재남령동단우도공현광집구반고산시범구부서적남령지구제이구과학찬공---금속이상험증공，종공심도2012．12 m，전정단실시료련속취심화종합지구물리측정작업，측정항목포괄자연전위、자연가마、전조솔、성파속도、밀도、정경、정사、정온、초성파성상、겁화솔、자화솔화정중삼분량자측등，원위획취료찬공부면적각충물이화학삼수、찬공궤하형태급정벽도상。종합이용각충측정자료，병결합암심편록자료，대전정단암성、금속광화대화단렬파쇄대진행료세치분석。결과표명，자연가마、성파속도화밀도측정대해찬공적암성향응명현，통과제작암성식별교회도，가식별출찬공부면적주요암성；해찬공적다금속광화주요유백오광화、흑오광화、황철광화、섬자광화、휘목광화등，재측정도중표현위고겁화솔、저전조솔、자이상수직분량ΔZ 급수평분량모차ΔH’이상적조합특정，거차능구유효지화분화평개광화대；단렬파쇄대적측정향응특정위정경확대，전조솔、성파속도、밀도감소，초성성상정암색조대，저사특정가작위조광보조표지。실천증명종합측정자료재심부조광방면능구발휘중요적작용。
The borehole of NLSD-2 is the second scientific drilling hole in the Nanling district,which is disposed by Pangushan demonstration area of Yudu-Ganxian ore district in the eastern of Nanling-verified as a metal exception hole.The whole well (the final depth is 2012.12 m)is implemented a continuous coring and well logging works,and the various physical and chemical parameters of drilling profile,borehole geometry and the images of well wall are achieved by in-situ.The logging projects include:spontaneous potential,natural gamma ray, resistivity, acoustic velocity, density, caliper, inclination, well temperature,ultrasonic imaging,polarization,magnetic susceptibility,borehole three-component magnetic survey logging et al. Combined with the core catalog information, the lithology, polymetallic mineralization belt and fracture zone of the whole well are carefully analysised by using the conventinal logging data The results show that,in the hole NLSD-2 ,the natural gamma ray,acoustic velocity and density logs which have obvious response,can be used to plot the lithology identification crossplot to identify the main lithology of borehole section.In this hole,the polymetallic mineralizations which mainly include scheelite mineralization,wolframite mineralization,pyritemineralization,sphaleritemineralization, molybdenite mineralization and so on,show the combination characteristics of high polarization,low resistivity,the vertical component (ΔZ)and the horizontal component (ΔH’)of magnetic anomaly in the loging figures.And based on these characteristics,the mineralized zone can be effectively divided and evaluated.The log response characteristics of farcture zone are expending caliper,low resistivity,low acoustic velocity and low density,and dark stripe in ultrasound imaging logs.And these features can be used to as an auxiliary flag in the ore prospecting.Therefore,the integrated logging data play an important role in the deep ore prospecting.
