| 硫酸盐浓度对水驱提高采收率的影响 |
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| 引用本文： | 付 红,李华斌,殷庆国,郭程飞. 硫酸盐浓度对水驱提高采收率的影响[J]. 油田化学, 2021, 38(1): 85-89 |
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| 作者姓名： | 付 红 李华斌 殷庆国 郭程飞 |
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| 作者单位： | （1. 成都理工大学能源学院，四川 成都 610059；2. 油气藏地质及开发工程国家重点实验室（成都理工大学），四川 成都 610059；3. 中国石油吐哈油田公司工程技术研究院，新疆 鄯善 838200；4. 中国石化中原油田普光分公司采气厂，四川 达州 636155） |
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| 基金项目： | 中国石油吐哈油田科研项目“低黏低渗油藏氮气泡沫驱综合调控技术研究”（项目编号GCYHZC2018）。 |
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| 摘 要： | 水驱提高采收率对注入水的离子组成有一定的要求,为了验证润湿性改变不是硫酸盐水驱提高原油采收率的唯一因素,在岩心润湿性为水湿的条件下进行水驱,研究了硫酸盐浓度、温度、注入速率和原油类型对硫酸盐水驱采收率的影响.结果表明,在水驱过程中,原油采收率随着硫酸盐浓度的增加而增加.在40℃下水驱提高采收率无明显增幅,随着温度的升高...
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| 关 键 词： | 硫酸盐 水驱 润湿性 采收率 |
Effect of Sulphate Concentration on the Improvement of Recovery Factor in Water Flooding |
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| FU Hong,LI Huabin,YIN Qingguo,GUO Chengfei. Effect of Sulphate Concentration on the Improvement of Recovery Factor in Water Flooding[J]. Oilfield Chemistry, 2021, 38(1): 85-89 |
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| Authors: | FU Hong LI Huabin YIN Qingguo GUO Chengfei |
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| Affiliation: | (College of Energy Sources,Chengdu University of Technology,Chengdu,Sichuan 610059,P R of China;State Key Laboratory of Oil and Gas Reservoir and Exploitation,Chengdu University of Technology,Chengdu,Sichuan 610059,P R of China;Research Institute of Engineering Technology,Tuha Oilfield Branch Company,PetroChina,Shanshan,Xinjiang 838200,P R of China;Gas Production Plant,Puguang Branch,Zhongyuan Oilfield Company,Sinopec,Dazhou,Sichuan 636155,P R of China) |
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| Abstract: | The implementation of water flooding for enhanced oil recovery(EOR)has certain requirements on the ion composition of injected water.In order to verify that wettability alteration was not the only factor on EOR by sulfate brine flooding,water flooding experiments were carried out to investigate the effect of sulfate concentration,temperature,injection rate and crude oil type on the total oil recovery of sulfate brine flooding under the condition of water-wet cores.The experiment results showed that the oil recovery increased with the increase of sulfate concentration.There was no obvious increment in oil recovery at 40°C and the effect of water flooding enhanced with the increase of temperature.Under high temperature condition,10%increase in oil recovery was observed in the core flooded with sulphate enriched brine as compared to the core flooded with sulphate-free brine.The crude oil type and injection rate also played a significant role on the effect of water flooding.The oil recovery of water flooding was enhanced more strongly with the higher asphaltene content or the faster injection rate.Sulfate ion could still contribute to the improvement of oil recovery under the condition of unchanged core wettability.The change of core wettability was not the only factor that improved oil recovery by sulfate flooding. |
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| Keywords: | sulphate water flooding wettability recovery factor |
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