南翼山油田卤水低温结晶过程研究

doi:10.3866/PKU.WHXB20110823

物理化学学报 >> 2011, Vol. 27 >> Issue (08): 1803-1808.doi: 10.3866/PKU.WHXB20110823

南翼山油田卤水低温结晶过程研究

李青海^2,3, 顾同欣¹, 于升松², 姚燕², 李冰², 李武²

1. 中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室, 兰州 730000;
2. 中国科学院青海盐湖研究所, 西宁 810008;
3. 中国科学院研究生院, 北京 100049

收稿日期:2011-03-28 修回日期:2011-05-19 发布日期:2011-07-19
通讯作者: 李冰 E-mail:libing@isl.ac.cn
基金资助:
国家自然科学基金(41073023)和国家十一五科技支撑计划项目(2006BAB09B07)资助

Study on the Precipitation Pathway of Nanyishan Oilfield Brine at Subzero Temperatures

LI Qing-Hai^2,3, GU Tong-Xin¹, YU Sheng-Song², YAO Yan²,LI Bing², LI Wu²

1. State Key Laboratory of Frozen Soil Engineering Cold and Arid Regions Environmental & Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000;
2. Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008;
3. Graduate University of Chinese Academy of Sciences, Beijing 100049

Received:2011-03-28 Revised:2011-05-19 Published:2011-07-19
Contact: LI Bing E-mail:libing@isl.ac.cn
Supported by:
The project was supported by the National Natural Science Foundation of China (41073023) and National Science and Technology Pillar Program During the Eleventh Five-Year Plan Period, China (2006BAB09B07).

摘要/Abstract

摘要：

自行设计搭建了一套油田水低温冷冻实验设备, 使用该设备研究了南翼山油田原始卤水在-18.90 °C到-30.90 °C范围内的结冰析盐过程, 精确测量了油田水随温度降低第一种和第二种固相的析出温度. 化学分析得到了该温度范围内Ca²⁺、Mg²⁺、K⁺、Cl^-、B₂O₃、Na⁺六种常量组分在液相中的含量变化趋势. 使用低温X射线衍射法对原始卤水在低温下得到的固相进行了初步的鉴定, 并对南翼山油田水的低温相变过程进行了实时监测. 实验结果表明: 南翼山油田水降温至-19.10 °C析出第一种盐NaCl·2H₂O, 降至-23.55 °C同时析出冰和NaCl·2H₂O.

关键词: 油田卤水, 冷冻, NaCl·2H₂O, 冰, 低温X射线衍射

Abstract:

The crystallization processes of oilfield brine components from the Nanyishan area at temperature between -18.90 and -30.90 °C were studied by a self-designed refrigeration instrument and the precipitation temperatures of the first and second salts were measured accurately. The concentrations of the major ions (Ca²⁺, Mg²⁺, K⁺, Cl^-, B₂O₃, Na⁺) in the liquid phase of the brine at different temperatures (from -18.90 to -30.90 °C) were determined by chemical analyses. The solids obtained at low temperature were identified and the phase changes of the oilfield brine at temperatures between -10.0 and -30.0 °C were monitored in situ by subzero temperature X-ray powder diffraction. The results show that the first salt (hydrohalite) precipitates at -19.10 °C and the ice and NaCl·2H₂O co-precipitate at -23.55 °C.

Key words: Oilfield brine, Freezing, Hydrohalite, Ice, X-ray diffraction at subzero temperature

李青海, 顾同欣, 于升松, 姚燕, 李冰, 李武. 南翼山油田卤水低温结晶过程研究[J]. 物理化学学报, 2011, 27(08), 1803-1808. doi: 10.3866/PKU.WHXB20110823

LI Qing-Hai, GU Tong-Xin, YU Sheng-Song, YAO Yan, LI Bing, LI Wu. Study on the Precipitation Pathway of Nanyishan Oilfield Brine at Subzero Temperatures[J]. Acta Phys. -Chim. Sin. 2011, 27(08), 1803-1808. doi: 10.3866/PKU.WHXB20110823

链接本文: https://www.whxb.pku.edu.cn/CN/10.3866/PKU.WHXB20110823

https://www.whxb.pku.edu.cn/CN/Y2011/V27/I08/1803

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南翼山油田卤水低温结晶过程研究

Study on the Precipitation Pathway of Nanyishan Oilfield Brine at Subzero Temperatures

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