| Performance of EDAB-HCl acid blended system as fracturing fluids in oil fields简 |
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| 引用本文： | 赵增迎,吕国诚,张以河,连胜江,田娜.Performance of EDAB-HCl acid blended system as fracturing fluids in oil fields简[J].中国化学工程学报,2014,22(2):202-207. |
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| 作者姓名： | 赵增迎 吕国诚 张以河 连胜江 田娜 |
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| 作者单位： | 1.School of Science, National Laboratory of Mineral Materials, China University of Geosciences (Beijing), Beijing 100083, China;2.Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China |
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| 基金项目： | Supported by the Fundamental Research Funds for the Central Universities （2652013107）, the Laboratory Open Funds of .. China University of Geosciences （Beijing）. |
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| 摘 要： | Due to the high price and formation damage of the guargum fracturing fluid, many oilfields are more and more interested in surfactant based fracturing fluids. The rheological properties of erucicamide dimethyl amidopropyl betaine （EDAB）-HC1 acid blended system and its suitability as fracturing fluid were investigated in this work. The effects of pH, concentration of EDAB, and temperature on the rheological properties of the blended system were studied. The results show that addition of EDAB improved the viscosity of the system from less than 10 mPa. s to about 400 mPa. s, which could retard the acid-rock reaction to about one half at 60℃ and one quarter at 90℃ comparing to straight HC1 acid, suggesting that there is sufficient time for the blended fluid to react with formation rock when it is used as fracturing fluid in an oil field. Core flow tests demonstrated that the EDAB-acid blended fluid could divert itself from high permeability formation core to low permeability one, thus ensuring proper acid placement in the target reservoirs.
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| 关 键 词： | viscosity surfactants viscoelastic fluids rheology |
| 收稿时间： | 2012-03-20 |
Performance of EDAB-HCI Acid Blended System as Fracturing Fluids in Oil Fields |
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| ZHAO Zengying,Guocheng,ZHANG Yihe,LIAN Shengjiang and TIAN Na.Performance of EDAB-HCI Acid Blended System as Fracturing Fluids in Oil Fields[J].Chinese Journal of Chemical Engineering,2014,22(2):202-207. |
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| Authors: | ZHAO Zengying Guocheng ZHANG Yihe LIAN Shengjiang and TIAN Na |
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| Affiliation: | 1.School of Science, National Laboratory of Mineral Materials, China University of Geosciences (Beijing), Beijing 100083, China;2.Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China |
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| Abstract: | Due to the high price and formation damage of the guargum fracturing fluid, many oilfields are more and more interested in surfactant based fracturing fluids. The rheological properties of erucicamide dimethyl amidopropyl betaine (EDAB)-HCl acid blended system and its suitability as fracturing fluid were investigated in this work. The effects of pH, concentration of EDAB, and temperature on the rheological properties of the blended system were studied. The results show that addition of EDAB improved the viscosity of the system from less than 10 mPa·s to about 400 mPa·s, which could retard the acid-rock reaction to about one half at 60℃ and one quarter at 90℃ comparing to straight HCl acid, suggesting that there is sufficient time for the blended fluid to react with formation rock when it is used as fracturing fluid in an oil field. Core flow tests demonstrated that the EDAB-acid blended fluid could divert itself from high permeability formation core to low permeability one, thus ensuring proper acid placement in the target reservoirs. |
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| Keywords: | viscosity surfactants viscoelastic fluids rheology |
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