| 用离子交换法确定粘土表面结合水界限 |
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| 引用本文： | 王平全.用离子交换法确定粘土表面结合水界限[J].西南石油学院学报,2000,22(1):59-61. |
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| 作者姓名： | 王平全 |
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| 作者单位： | 西南石油学院石油工程系 |
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| 基金项目： | 中国石油集团公司“九五”重大科技攻关项目“强化井壁稳定机理研究”（部199） |
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| 摘 要： | 针对泥页岩吸附结合水诱发或加剧井壁不稳定问题，采用离子交换法对粘土表面结合水界限进行了定性确定。结果表明：粘土表面结合水分强吸附结合水，松散结合水（渗透结合水）、自由水三大类；相对水气平衡压Ｐ／Ｐｓ分别为０．９和０．９８是粘土－水体系的两个特征湿度。前为粘土表面强结合水与松散结合水（渗透结合水）之间的交界点（界限）；后为松散结合水（渗透结合水）与自由水之间的交界点（界限）。
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| 关 键 词： | 粘土 结合水界限 离子交换法 泥页岩 井壁稳定性 |
| 文章编号： | 1000-2634(2000)01-0059-03 |
| 修稿时间： | 1999-04-21 |
DETERMINATION OF THE TYPES AND BOUNDARY LINE OF BOUND WATER ON CLAY SURFACE BY ION EXCHANGE |
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| WANG Pinquan.DETERMINATION OF THE TYPES AND BOUNDARY LINE OF BOUND WATER ON CLAY SURFACE BY ION EXCHANGE[J].Journal of Southwest Petroleum Institute,2000,22(1):59-61. |
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| Authors: | WANG Pinquan |
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| Abstract: | In accordance with wellbore instability induced by bound water on clay surface, the types and boundary line of bound water on clay surface is quantitatively determined by ion exchange. The results show that the bound water on clay surface includes strong bound water, loose bound water(osmotic bound water) and free water. The relative vapor pressure p/ps=0.9 or 0.98 is the special moisture, the fomer is the boundary line between the strong bound water and the loose bound water(osmotic bound water)on clay surface, the latter is the boundary line between the loose bound water and free water on clay surface. |
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| Keywords: | clay bound water boundary line ion exchange special moisture |
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