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| 延缓交联体系深部调剖性能的影响因素 |
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戴彩丽1,2,赵娟2,姜汉桥1,汪庐山3,靳彦欣3,吕心瑞2,赵福麟2
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(1.中国石油大学 石油天然气工程学院,北京 102249;2.中国石油大学 石油工程学院,山东 青岛 266555;3.胜利油田 采油工艺研究院,山东 东营 257000)
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| 摘要: |
| 通过室内试验和物理模拟试验,评价各种因素对水包油包水(W1/O/W2)的多重乳液交联剂冻胶体系成冻性能和封堵能力的影响。结果表明:与未包覆的Cr(AC)3交联剂相比,多重乳液交联剂对聚合物有延缓交联的作用,更有利于进行深部调剖;随着聚合物、交联剂质量浓度和温度的增加,成冻时间缩短,冻胶强度增大;随着矿化度的增大,成冻时间先缩短后增加,冻胶强度先增强后变弱;交联剂冻胶的封堵能力随着聚合物、交联剂质量浓度的增加,均近似线性增大,但交联剂的影响更明显;封堵能力与地层渗透率有关,随着渗透率增大突破压力梯度在双对数坐标系中线性减小。 |
| 关键词: 多重乳液交联剂 W1/O/W2 成冻性能 封堵能力 延缓交联 |
| DOI： |
| 分类号::TE 39 |
| 文献标识码:A |
| 基金项目:国家“863”高技术研究发展计划项目(2007AA06Z234),中国博士后科学基金项目(20090460481) |
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| Influencing factors of delayed cross linking system in deep profile control |
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DAI Cai li1,2, ZHAO Juan2, JIANG Han qiao1, WANG Lu shan3, JIN Yan xin3, LÜ Xin rui2, ZHAO Fu lin2
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(1.Faculty of Petroleum Engineering in China University of Petroleum, Beijing 102249, China;2.College of Petroleum Engineering in China University of Petroleum, Qingdao 266555, China;3.Oil Production Technology Research Institute of Shengli Oilfield, Dongying 257000, China)
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| Abstract: |
| The influences of various factors on gel behavior and sealing capability of water in oil in water(W1/O/W2)multiple emulsion cross linking gel system were evluated through lab and physical simulation experiment. The results show that compared with the Cr(AC)3 without coating, the new cross linking agent can delay cross linking for the polymer, and advantages to deep profile control. With the increase of mass concentration of polymer, mass concentration of cross linking agent and temperature, the gel time reduces and gel strength increases. With the increase of salinity, the gel time shortens first and gets longer afterwards, and the gel strength weakens first and increases afterwards. The sealing capacity presents a tendency of linear increase with the increase of mass concentration of polymer and cross linking agent, and the cross linking agent has a greater impact. With the increase of permeability, the sealing capacity reduces in linear relation for the log log plot. |
| Key words: multiple emulsion cross linking agent water in oil in water (W1/O/W2) gel behavior sealing capacity delayed cross linking |
