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1、11/20/2006 Directed by Liu Hongqi Copyright reserved.11/20/2006 Directed by Liu Hongqi Copyright reserved.1Ch3 核测井核测井 3.1 GR&SGR11/20/2006 Directed by Liu Hongqi Copyright reserved.11/20/2006 Directed by Liu Hongqi Copyright reserved.2Ch3 核测井核测井 3.1 GR&SGRMerry Christmas11/20/2006 Directed by Liu Ho
2、ngqi Copyright reserved.11/20/2006 Directed by Liu Hongqi Copyright reserved.3Ch3 核测井核测井 3.1 GR&SGR11/20/2006 Directed by Liu Hongqi Copyright reserved.11/20/2006 Directed by Liu Hongqi Copyright reserved.4Ch3 核测井核测井 3.1 GR&SGR11/20/2006 Directed by Liu Hongqi Copyright reserved.11/20/2006 Directed
3、by Liu Hongqi Copyright reserved.5Ch3 核测井核测井 3.1 GR&SGR11/20/2006 Directed by Liu Hongqi Copyright reserved.11/20/2006 Directed by Liu Hongqi Copyright reserved.6Ch3 核测井核测井 3.1 GR&SGR11/20/2006 Directed by Liu Hongqi Copyright reserved.11/20/2006 Directed by Liu Hongqi Copyright reserved.7Ch3 核测井核测井
4、 3.1 GR&SGR11/20/2006 Directed by Liu Hongqi Copyright reserved.11/20/2006 Directed by Liu Hongqi Copyright reserved.8Nuclear LoggingNuclear Logging 核测井是通过探测岩石及其孔隙核测井是通过探测岩石及其孔隙核测井是通过探测岩石及其孔隙核测井是通过探测岩石及其孔隙流体的核与电磁学物理性质,研究钻流体的核与电磁学物理性质,研究钻流体的核与电磁学物理性质,研究钻流体的核与电磁学物理性质,研究钻井地质剖面,勘探石油、天然气、煤井地质剖面,勘探石油、天然气、
5、煤井地质剖面,勘探石油、天然气、煤井地质剖面,勘探石油、天然气、煤以及铀等有用矿藏的地球物理方法。以及铀等有用矿藏的地球物理方法。以及铀等有用矿藏的地球物理方法。以及铀等有用矿藏的地球物理方法。核测井的适用条件:一般的泥浆井、核测井的适用条件:一般的泥浆井、核测井的适用条件:一般的泥浆井、核测井的适用条件:一般的泥浆井、油基泥浆井、高矿化度泥浆井、空气油基泥浆井、高矿化度泥浆井、空气油基泥浆井、高矿化度泥浆井、空气油基泥浆井、高矿化度泥浆井、空气钻井(裸眼井、套管井)钻井(裸眼井、套管井)钻井(裸眼井、套管井)钻井(裸眼井、套管井)Ch3 核测井核测井 3.1 GR&SGR11/20/2006
6、 Directed by Liu Hongqi Copyright reserved.11/20/2006 Directed by Liu Hongqi Copyright reserved.9Ch3 核测井核测井 3.1 GR&SGR核核测测井井放放射射性性测测井井核磁共振测井:通过测量核子在外加磁场核磁共振测井:通过测量核子在外加磁场作用下的特征,识别岩性和流体。如作用下的特征,识别岩性和流体。如MRIL,CMRNatural Gamma:通过测量放射性元素自通过测量放射性元素自通过测量放射性元素自通过测量放射性元素自然衰变产生的伽马射线强度,研究钻井地然衰变产生的伽马射线强度,研究钻井地
7、然衰变产生的伽马射线强度,研究钻井地然衰变产生的伽马射线强度,研究钻井地质剖面上地层岩性变化。质剖面上地层岩性变化。质剖面上地层岩性变化。质剖面上地层岩性变化。GR&SGRGR-GRGR-GR:通过测量伽马射线与地层相互作通过测量伽马射线与地层相互作通过测量伽马射线与地层相互作通过测量伽马射线与地层相互作用后诱发产生的次生伽马射线的强度来研用后诱发产生的次生伽马射线的强度来研用后诱发产生的次生伽马射线的强度来研用后诱发产生的次生伽马射线的强度来研究地层物性的一类测井方法,如究地层物性的一类测井方法,如究地层物性的一类测井方法,如究地层物性的一类测井方法,如DENDEN,PePe3)3)N-GR
8、N-GR 通过测量中子射线与地层相互作通过测量中子射线与地层相互作通过测量中子射线与地层相互作通过测量中子射线与地层相互作用后诱发产生的伽马射线的强度来研究地用后诱发产生的伽马射线的强度来研究地用后诱发产生的伽马射线的强度来研究地用后诱发产生的伽马射线的强度来研究地层物性的一类测井方法,如层物性的一类测井方法,如层物性的一类测井方法,如层物性的一类测井方法,如NGRNGR11/20/2006 Directed by Liu Hongqi Copyright reserved.11/20/2006 Directed by Liu Hongqi Copyright reserved.10Ch3 核
9、测井核测井 3.1 GR&SGR1.地层中的放射性元素地层中的放射性元素 40K1.46Mev 238U 1.76Mev 232Th2.62Mev2.射线的种类射线的种类 :2He4:带电,质量:带电,质量大,易吸收,穿透能力小大,易吸收,穿透能力小 :e:带电,质量小,:带电,质量小,易吸收,穿透能力小易吸收,穿透能力小 :光子:光子,不带电,质,不带电,质量小,穿透能力强量小,穿透能力强 1.76一、一、基本知识基本知识11/20/2006 Directed by Liu Hongqi Copyright reserved.11/20/2006 Directed by Liu Hongqi
10、 Copyright reserved.11 能能能能在在在在衰衰衰衰变变变变时时时时发发发发射射射射 光光光光子子子子的的的的元元元元素素素素称称称称为为为为伽伽伽伽马马马马辐辐辐辐射射射射体体体体。地地地地层层层层中中中中能能能能发发发发射射射射伽伽伽伽马马马马光光光光子子子子的的的的核核核核素素素素主主主主要要要要是是是是铀铀铀铀、钍钍钍钍及及及及其其其其衰衰衰衰变变变变产产产产物物物物和和和和钾钾钾钾的的的的放放放放射射射射性性性性同同同同位位位位素素素素K-40K-40。伽伽伽伽马马马马光光光光子子子子与与与与物物物物质质质质发发发发生生生生相相相相互互互互作作作作用用用用的的的的过
11、过过过程程程程中中中中,能能能能量量量量逐逐逐逐渐渐渐渐降降降降低低低低。如如如如果果果果射射射射线线线线的的的的能能能能量量量量30Mev,7 terrestrial deposit,oxidation environment,rock mantleTH/U7 marine deposit、gray or green clayH/U2 black marine clay or phosphate rock(6)、确定粘土矿物类型)、确定粘土矿物类型 各种粘土矿物由于各自的地质成因及地球化学性质各种粘土矿物由于各自的地质成因及地球化学性质的不同,铀(的不同,铀(U)、钍)、钍(Th)、钾、钾(
12、K)的含量也各不相同。的含量也各不相同。一般来讲,在绝大多数粘土矿物中,钾和钍的含量高,一般来讲,在绝大多数粘土矿物中,钾和钍的含量高,而铀的含量相对较低。因此,根据钍而铀的含量相对较低。因此,根据钍、钾含量的比值,、钾含量的比值,可以大致确定粘土矿物的类型。可以大致确定粘土矿物的类型。11/20/2006 Directed by Liu Hongqi Copyright reserved.11/20/2006 Directed by Liu Hongqi Copyright reserved.5711/20/2006 Directed by Liu Hongqi Copyright rese
13、rved.11/20/2006 Directed by Liu Hongqi Copyright reserved.58Mineral identification富含Th矿物氯泥石云母长石海绿石高岭石伊利石蒙脱石11/20/2006 Directed by Liu Hongqi Copyright reserved.11/20/2006 Directed by Liu Hongqi Copyright reserved.59Summary1.General law of radioactivity 2.Radioactivity of three kind of rocks,esp.sedimentary rocks3.For common geology profile,what is the features of GR curve?4.What are the applications of GR?5.How to calculate Vsh by using GR(SP)6.To explain the principle of SGR7.What are the applications of SGR?
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