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| 超低浓度羟丙基胍胶压裂液体系的研制及在苏里格气田的应用 |
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李小玲1,2,丁里1,2,石华强1,2,尹晓宏1,2,吕小明1,2
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(1. 长庆油田分公司油气工艺研究院;2. 陕西低渗透油气田勘探开发国家工程实验室)
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| 摘要: |
| 在分析苏里格气田上古储层地质条件的基础上,依据“羟丙基胍胶的临界重叠浓度就是交联的最低浓度”理论和有机硼交联机理,通过对交联络合剂和合成条件的优选,研发出新型的高效交联剂,采用该交联剂体系,羟丙基胍胶稠化剂质量分数较常规气井降低40%时,仍保持了良好的耐温和流变性能。该压裂液体系残渣残胶含量大大降低,降低了对储层的伤害程度。截至到2011年底,该压裂液已成功应用于苏里格气田42口直井、3口水平井,取得了较好的改造效果。 |
| 关键词: 超低浓度压裂液 羟丙基胍胶 高效交联剂 低伤害 |
| DOI：10.3969/j.issn.1007-3426.2013.03.015 |
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| Development of the super-low concentration hydroxypropyl guar gelled fracturing fluid and its application in Sulige gas field |
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Li Xiaoling1,2, Ding Li1,2, Shi Huaqiang1,2, Yin Xiaohong1,2, Lv Xiaoming1,2
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(1. Oil ＆ Gas Technology Research Institute, Changqing Oilfield Company,Xi'an 710021, Shaanxi,China;2.Shaanxi Low Permeability Oil and Gas Field Exploration and Development of the National Engineering Laboratory,Xi'an710021, Shaanxi,China)
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| Abstract: |
| On the basis of the analysis of Upper Paleozoic Reservoir geological conditions in Sugeli gas field, according to the theory of critical concentration of the hydroxypropyl guar gum(HPG) is the lowest concentration of cross-inking, and organic boron crosslinking mechanism, the new style high efficient cross-linking agent has been studied through the optimizing of synthesis conditions and cross-linking complexing agent. The application of this cross-linking system could make the hydroxypropyl guar concentration decline by 40%, and the fracturing fluid system could still keep the good temperature-resistance property and rheological behavior. The volume of the residual gum decrease greatly alleviated the damage to reservoir. By the end of the 2011, the fracturing fluid had been successfully used in 42 vertical wells and 3 horizontal wells of the Sulige gas field, which achieved better modification effects. |
| Key words: super-low concentration fracturing fluid hydroxypropyl guar gum high efficiency cross-linking complex agent low damage |
