CN1987438B - 一种核磁共振岩样分析仪标样配方的方法 - Google Patents

一种核磁共振岩样分析仪标样配方的方法 Download PDF

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CN1987438B
CN1987438B CN2006101477812A CN200610147781A CN1987438B CN 1987438 B CN1987438 B CN 1987438B CN 2006101477812 A CN2006101477812 A CN 2006101477812A CN 200610147781 A CN200610147781 A CN 200610147781A CN 1987438 B CN1987438 B CN 1987438B
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CN1987438A (zh
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袁建新
沈亚光
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Shanghai SK Petroleum Chemical Equipment Corp Ltd
Shanghai SK Petroleum Equipment Co Ltd
Shanghai SK Petroleum Technology Co Ltd
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Shanghai SK Petroleum Equipment Co Ltd
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Abstract

本发明涉及一种核磁共振岩样分析仪标样配方的方法,其特征在于,液态组分A类和B类,要求具有不同的旋磁比,用来组成孔隙度不同的系列标样,其方法为:将弛豫剂C类溶解于液态组分A中,组成X液,控制弛豫剂C所占浓度在0.002%-2%之间;将弛豫剂C类溶解于液态组分B中,组成Y液,控制弛豫剂C所占浓度在0.002%-2%之间;利用数字滴定仪,分别分配X液和Y液,使总容积保持恒值0.1毫升-20毫升,控制X液和Y液的体积比为0.05%到50%,形成1%到36%孔隙度的标样系列。本发明的优点是可解决分析物性的核磁共振仪的孔隙度参数的精确定量校正。

Description

一种核磁共振岩样分析仪标样配方的方法
技术领域
本发明涉及一种核磁共振岩样分析仪标样配方的方法,尤其涉及一种核磁共振岩样孔隙度标样的配制方法,属于核磁共振物性分析信号标定技术领域。 
背景技术
石油工业需要对岩样进行物性分析,提供岩样的孔隙度、渗透率等参数。 
核磁共振仪能测出物体含水量,核磁共振信号的大小与含水量成比例。岩样经饱和水处理后,内部孔隙充满水,其核磁共振信号经孔隙度标样校正后,计算出岩样的孔隙度参数。 
分析物性的核磁共振仪校正,目前一般采用无水煤油和蒸馏水,无法做到精确定量校正。 
本发明的标样,可解决分析物性的核磁共振仪的孔隙度参数的精确定量校正。 
发明内容
本发明的目的是提供一种可解决分析物性的核磁共振仪的孔隙度参数的精确定量校正的核磁共振岩样分析仪标样配方的方法。 
为实现以上目的,本发明的技术方案是提供一种核磁共振岩样分析仪标样配方的方法,其特征在于,液态组分A类和B类,要求具有不同的旋磁比,用来组成孔隙度不同的系列标样,其方法为: 
步骤1:将弛豫剂C类溶解于液态组分A中,组成X液,控制弛豫剂C所占浓度在0.002%-2%之间; 
步骤2:将弛豫剂C类溶解于液态组分B中,组成Y液,控制弛豫剂C所占浓度在0.002%-2%之间; 
步骤3:利用数字滴定仪,分别分配X液和Y液,使总容积保持恒值0.1毫升-20毫升,控制X液与X液和Y液和的体积比在0.05%-50%之间,形成1%到36%孔隙度的标样系列。 
所述的A类为正辛烷、异辛烷、无水煤油、氯仿、丙酮、蒸馏水或去离子水,其旋磁比为42.58MHz/T。 
所述的B类为二氟二氯甲烷、四氯化碳、四溴甲烷、三溴一氯甲烷或重水。 
所述的弛豫剂C类为乙酰丙酮钴、乙酰丙酮锰、乙酰丙酮铁、乙酰丙酮镍、乙酰丙酮铬、氯化锰或硫酸铜。 
本发明采用控制标样的核磁共振信号的大小,形成1%到36%孔隙度的标样系列,控制标样的弛豫速率,使T2在1秒以内的核磁共振岩样分析仪标样配方的方法。 
核磁共振信号取决于自旋质子系统在外加恒定磁场中的初始磁化矢量M0, 
M0=N(r/2πh)2B0/4kT 
其数值大小取决于单位体积自旋质子数N、外加磁场强度B0、环境温度T。 
从上式中可以得出一些重要的结论: 
a)初始磁化矢量M0与B0成正比 
b)初始磁化矢量M0与样品数量成正比,与样品温度成反比 
c)外加激励电场的f0与自旋质子的旋磁比r符合拉摩公式时,产生核磁共振 
本发明A类旋磁比的选择,使其能产生核磁共振信号,而B类却没有核磁共振信号。于是核磁共振信号的大小仅与A类的多少成比例关系。 
发生核磁共振后,取消共振条件,从高能态回到低能态,称为弛豫。弛豫过程有快有慢,每次分析,必须从低能态开始,为提高分析效率,有必要添加弛豫剂,缩短驰豫过程。 
弛豫剂C类是顺磁类物质,含有未成对的电子,其电子自旋磁矩比核自旋磁矩大一千多倍,因比在核外产生的局部磁场高达一万高斯,改变了外加磁场B0的均匀度,达到了加快驰豫速率的目的。 
本发明的优点是可解决分析物性的核磁共振仪的孔隙度参数的精确定量校正。 
具体实施方式
以下结合实施例对本发明作进一步说明。 
实施例 
所述的A类为正辛烷、异辛烷、无水煤油、氯仿、丙酮、蒸馏水或去离子水,其旋磁比为42.58MHz/T。 
所述的B类为二氟二氯甲烷、四氯化碳、四溴甲烷、三溴一氯甲烷或重水,其旋磁比不同于A类。 
所述的弛豫剂C类为乙酰丙酮钴、锰、铁、镍、铬、氯化锰或硫酸铜。 
实施例1 
一种核磁共振岩样分析仪标样配方的方法,为: 
步骤1:将2克硫酸铜溶解于500克去离子水中,组成X液,控制硫酸铜所占浓度为0.4%,充分溶解后备用; 
步骤2:将2克硫酸铜溶解于500克重水中,组成Y液,控制硫酸铜所占浓度为0.4%,充分溶解后备用; 
步骤3:利用数字滴定仪,取X液0.015毫升,取Y液9.985毫升,使总容积保持恒值10毫升,控制X液与X液和Y液和的体积比在0.05%-50%之间,充分混合成为1%标样; 
取X液0.15毫升,取Y液9.85毫升,使总容积保持恒值10毫升,X液与X液和Y液之和的体积比为1.5%,充分混合成为10%标样。 
实施例2 
步骤1:将3克乙酰丙酮铬溶解于500克异辛烷中,组成X液,控制乙酰丙酮铬所占浓度为0.6%,充分溶解后备用; 
步骤2:将3克乙酰丙酮铬溶解于500克四溴甲烷中,组成Y液,控制乙酰丙酮铬所占浓度为0.6%,充分溶解后备用; 
步骤3:利用数字滴定仪,取X液0.015毫升,取Y液9.985毫升,使总容积保持恒值10毫升,控制X液与X液和Y液和的体积比在0.05%-50%之间,充分混合成为3%标样; 
取X液0.15毫升,取Y液9.85毫升,使总容积保持恒值10毫升,X液与X液和Y液之和的体积比为1.5%,充分混合成为30%标样。 

Claims (4)

1.一种核磁共振岩样分析仪标样配方的方法,其特征在于,液态组分A类和B类,要求具有不同的旋磁比,用来组成孔隙度不同的系列标样,其方法为:
步骤1:将弛豫剂C类溶解于液态组分A中,组成X液,控制弛豫剂C所占浓度在0.002%-2%之间;
步骤2:将弛豫剂C类溶解于液态组分B中,组成Y液,控制弛豫剂C所占浓度在0.002%-2%之间;
步骤3:利用数字滴定仪,分别分配X液和Y液,使总容积保持恒值0.1毫升-20毫升,控制X液与X液和Y液和的体积比在0.05%-50%之间,形成1%到36%孔隙度的标样系列。
2.根据权利要求1所述的一种核磁共振岩样分析仪标样配方的方法,其特征在于,所述的A类为正辛烷、异辛烷、无水煤油、氯仿、丙酮、蒸馏水或去离子水,其旋磁比为42.58MHz/T。
3.根据权利要求1所述的一种核磁共振岩样分析仪标样配方的方法,其特征在于,所述的B类为二氟二氯甲烷、四氯化碳、四溴甲烷、三溴一氯甲烷或重水。
4.根据权利要求1所述的一种核磁共振岩样分析仪标样配方的方法,其特征在于,所述的弛豫剂C类为乙酰丙酮钴、乙酰丙酮锰、乙酰丙酮铁、乙酰丙酮镍、乙酰丙酮铬、氯化锰或硫酸铜。
CN2006101477812A 2006-12-22 2006-12-22 一种核磁共振岩样分析仪标样配方的方法 Expired - Fee Related CN1987438B (zh)

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CN102338759B (zh) * 2010-07-14 2014-08-06 中国石油天然气股份有限公司 一种全直径核磁共振岩样分析仪标准样
CN105223221B (zh) * 2015-10-22 2017-08-15 苏州纽迈分析仪器股份有限公司 一种低场核磁共振测量钻井液含油率和含水率的方法
CN111963160B (zh) * 2020-08-28 2022-08-30 中国石油天然气集团有限公司 一种便携式核磁共振测井刻度用装置及快速刻度方法

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CN1265471A (zh) * 1998-11-19 2000-09-06 施卢默格海外有限公司 利用磁共振测井测量量的地层构造评估
US6987385B2 (en) * 2003-05-30 2006-01-17 Halliburton Energy Services, Inc. System and methods for analyzing carbonate formations while drilling
CN1763563A (zh) * 2004-10-21 2006-04-26 北京大学 用岩石核磁共振弛豫信号测量地层岩石物性的设备及测量方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1672327A1 (ru) * 1988-05-10 1991-08-23 Всесоюзный научно-исследовательский, проектно-конструкторский и технологический институт геологических, геофизических и геохимических информационных систем Способ определени пористости горных пород с помощью ЯМР-релаксометра
CN1265471A (zh) * 1998-11-19 2000-09-06 施卢默格海外有限公司 利用磁共振测井测量量的地层构造评估
US6987385B2 (en) * 2003-05-30 2006-01-17 Halliburton Energy Services, Inc. System and methods for analyzing carbonate formations while drilling
CN1763563A (zh) * 2004-10-21 2006-04-26 北京大学 用岩石核磁共振弛豫信号测量地层岩石物性的设备及测量方法

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