| 低电阻率油层中孔砂岩岩电及核磁实验研究 |
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| 引用本文： | 沈爱新,陈守军,王黎,万金彬,杨嘉.低电阻率油层中孔砂岩岩电及核磁实验研究[J].测井技术,2005,29(3):191-194. |
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| 作者姓名： | 沈爱新 陈守军 王黎 万金彬 杨嘉 |
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| 作者单位： | 中国石油集团测井有限公司技术中心,湖北,潜江,433123;四川石油管理局测井公司,重庆,400021 |
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| 摘 要： | 通过实验讨论了油层低电阻率与阳离子交换量、矿化度及温度的关系.分析了温度、压力对阿尔奇公式中各参数的影响效果,得出高温高压条件下饱和度指数n随压力和矿化度的增大而增大、随温度的增大而减小;孔隙度指数m随压力的增大而增大,在低矿化度下m值基本不受温度的影响,而在高矿化度下却随温度的升高而增大的变化规律.利用核磁实验新方法研究了低电阻率油层岩心的NMR横向弛豫特性,证实可根据T2谱形和T2平均值来判别岩石含油或含水.
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| 关 键 词： | 阳离子交换量 高温高压 核磁共振 横向弛豫 实验研究 |
| 文章编号： | 1004-1338(2005)03-0191-04 |
| 修稿时间： | 2005年2月23日 |
Experimental Study of Lithology and Nuclear Magnetic Resonance for Medium Sand Rock in Low Resistivity Reservoir |
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| SHEN Ai-xin,CHEN Shou-jun,WANG Li,WAN Jin-bin,Yang Jia.Experimental Study of Lithology and Nuclear Magnetic Resonance for Medium Sand Rock in Low Resistivity Reservoir[J].Well Logging Technology,2005,29(3):191-194. |
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| Authors: | SHEN Ai-xin CHEN Shou-jun WANG Li WAN Jin-bin Yang Jia |
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| Abstract: | Lab experiments are made on relations between the low resistivity and cation exchange capacity as well as solution salinity and temperature. Analyzed are effects of temperature and pressure on parameters of Archie formula. Based on this, the change law of saturation index (n) and porosity index (m) is obtained at high temperature and pressure. The new NMR method is used to describe characteristics of lateral relaxation in the low resistivity cores, which has proved that oil and water can be identified according to the shapes of T_2 distribution spectrum and the average value of T_2. |
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| Keywords: | cation exchange capacity high temperature and high pressure NMR lateral relaxation experimental study |
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