| 变黏酸的室内合成及性能研究 |
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| 引用本文： | 张俊,胡君城,童维进.变黏酸的室内合成及性能研究[J].海洋地质译丛,2011(3):60-63. |
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| 作者姓名： | 张俊 胡君城 童维进 |
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| 作者单位： | [1]油气钻采工程湖北省重点实验室,长江大学石油工程学院,湖北荆州434023 [2]中国石油长城钻探工程有限公司,辽宁盘锦124010 [3]中国石油化工股份有限公司江汉油田分公司采油厂,湖北潜江433100 |
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| 基金项目： | 与中国石油化工股份有限公司江汉油田分公司采油工艺研究院合作项目《VDA酸液配方研究》的部分研究成果. |
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| 摘 要： | 酸化是油气井增产的重要手段，而均匀有效地解除地层污染是酸化成功的关键。对于非均质性储层，酸液会优先处理高渗透层，难以进入低渗透层，无法实现均匀酸化。常规变黏酸、胶凝酸中由于含有聚合物，酸岩反应结束后酸液破胶困难，且残酸中含有残渣不溶物，对低渗透油气储层伤害严重。为此，在室内合成了一种黏弹性表面活性剂JX，利用该表面活性剂配制了新型的黏弹性表面活性变黏酸VDA—JX，并对其进行了性能评价。室内研究结果表明：该酸液体系黏度随酸浓度的增加先增大后减小，当酸浓度在13％左右时黏度出现最大值，可以达到350mPa·s，能够满足酸化过程中的抗温和抗剪切性能，破胶时间短，易返排，且破胶后与煤油分层，不污染油层。
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| 关 键 词： | 黏弹性表面活性剂 变黏酸 性能评价 酸化 |
Preparation and performance of the variable viscosity acid |
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| Authors: | ZHANG Jun HU Juncheng TONG Weijin |
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| Institution: | 1. Key Laboratory of Oil and＇ Gas Drilling and Production Engineering, Petroleum Engineering College of Yangtze University, Jingzhou Hubei 434023, China ; 2. CNPC Great Wall Drilling Company, Panjin Liaoning 124010, China ; 3. The Oil Recovery Factory of Jianghan Oil field, Qianjiang Hubei 433100, China ) |
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| Abstract: | Acidification is an important means to increase the yield of oil and gas wells, and the key to successful acidization is removing formation damage. In heterogeneous reservoir, acid will give priority to high permeability layer and it is difficult to enter the low permeability layer, so even acidification can not be achieved. Due to the polymers in conventional variable viscosity and acid gel, it is difficult for gel to break after acid-rock reaction and the residue and insoluble in residual acid will seriously damage low permeability reservoir. Therefore, a viseoelastic surfactant JX was made indoor, and it is used to prepare a new variable viscosity of viscoelastic surfactant acid VDA-JX, and its performance was evaluated. Laboratory study results show that the viscosity of the acid with the acid concentration increases firstly and then decreases, when the acid concentration reach 13%, the maximum viscosity occurs which can be achieved to 350 mPa·s, meeting temperature resistance and shear resistance demands in the process of acidification, meanwhile, the gel breaking time is short, acid is easy to flow back, and is stratified with the kerosene after gel breaking, so it doesn＇t pollute the reservoir. |
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| Keywords: | viscoelastic surfactant variable viscosity acid performance evaluation acidization |
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