测井和地震联合解释CCSD先导孔反射体

英文篇名：Joint Interpretation of Reflectors via Well Logging and Seismic Data in the Pilot Hole of CCSD
中文刊名：地球科学
作者：潘和平 ; 牛一雄 ; 王文先 ; 朱留芳 ; 许东辉 ; 李双林
英文作者：PAN He-ping 1 ; 2 ; NIU Yi-xiong2 ; WANG Wen-xian2 ; ZHU Liu-fang3 ; XU Dong-hui3 ; LI Shuang-lin3 1.Institute of Geophysics and Geomatics ; China University of Geosciences ; Wuhan430074 ; China 2.CCSD Engineering Center ; Beijing100035 ; China 3.Shengli Well Logging Company ; Dongying257001 ; China
中文关键词：中国大陆科学钻探 ; 地球物理测井 ; 地震 ; 联合解释 ; 波阻抗 ; 反射体.
英文关键词：CCSD ; geophysics well logging ; seismology ; joint interpretation ; wave impedance ; reflector.
出版日期：2006-07-30
机构：中国地质大学地球物理与空间信息学院,中国大陆科学钻探工程中心北京100035,中国大陆科学钻探工程中心,中国大陆科学钻探工程中心,中石化胜利测井公司,中石化胜利测井公司,中石化胜利测井公司,,湖北武汉430074,北京100035,北京100035,山东东营257001,山东东营257001,山东东营257001
年：2006
期：04
出版单位：地球科学

摘要

利用声波、密度、自然伽玛等测井曲线资料、配合录井资料划分CCSD先导孔变质岩岩性,然后,用声波、密度计算波阻抗,与井旁VSP资料对比,分析CCSD先导孔孔区反射体.分析结果表明(1)岩性间波阻抗差异产生反射波,如榴辉岩与副片麻岩之间波阻抗差异;榴辉岩与超基性蛇纹岩之间的波阻抗差异等;(2)破碎特别是韧性剪切带产生反射波,而如果断层破碎带尺度很小(在1m以下),也不一定能产生强反射波.这些研究结果对标定地壳中的反射地震信号具有重要意义.
The main aim of this paper is to analyze reflectors in the pilot hole of CCSD (China Continental Scientific Drilling). The lithology of the metamorphite in the CCSD pilot hole can be identified by logging curves and geo-logging data. The wave impedance can be calculated by using acoustic (AC) and density log (DEN) curves. By comparing the acoustic wave impedance with the VSP (vertical seismic profile), the reflectors of the CCSD pilot hole have been analyzed. The results indicate that reflected waves are primarily produced by the wave impedance properties of the lithology (such as the wave impedance difference between eclogite and paragneiss or between eclogite and ultrabasic serpentinite, etc) and the fracture. The fractures are mainly the ductile shear zones. If the fracture thickness is less than 1m, reflectors cannot be produced. The study provides significant data concerning the interpretation of seismic reflection signals in the earth's crust.

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