不同浓度、pH值SDBS压裂液对页岩储层特性影响研究
投稿时间：2016-07-15  修订日期：2016-07-15  点此下载全文
引用本文：彭灿威,曹函,冯科玮,等.不同浓度、pH值SDBS压裂液对页岩储层特性影响研究[J].钻探工程,2016,43(10):188-192.
PENG Can-wei,CAO Han,FENG Ke-wei,et al. Study on the Effect of Concentrations and pH Values of SDBS Fracturing Fluid on Shale Reservoir Characteristics[J]. Drilling Engineering, 2016,43(10):188-192.
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作者单位E-mail
彭灿威 The Ministry of Education Key Laboratory of Non-ferrous Metal Ore Forecast 18807480451@163.com 
曹函* 中南大学有色金属成矿预测与地质环境监测教育部重点实验室 hancao@csu.edu.cn 
冯科玮 香港科技大学土木与环境工程系  
陈江湛 中南大学有色金属成矿预测与地质环境监测教育部重点实验室  
孙平贺 中南大学有色金属成矿预测与地质环境监测教育部重点实验室  
基金项目:国家自然科学基金“含煤层气储层物性与压裂液微观特性动态耦合作用机理研究”(编号：41302124)；湖南科技大学页岩气资源利用湖南省重点实验室开放基金资助项目(编号：E21425)；中南大学中央高校基本科研业务费专项资金资助（编号：2016ZZTS433）
中文摘要:在页岩储层压裂过程中，不同浓度、不同pH值的SDBS压裂液体系会直接影响页岩储层稳定性，进而影响造缝性能。通过实验分析了页岩储层在不同浓度、pH值的SDBS压裂液作用下的膨胀抑制性、润湿反转性能。实验结果表明：0.02%SDBS压裂液下页岩储层的膨胀变形最小、膨胀变形速率最慢，即膨胀抑制效果最好；0.03%SDBS压裂液下页岩的润湿性改造最好，接触角为30 °。pH值为8的SDBS压裂液对炭质页岩的膨胀变形和膨胀速率起到了最佳的抑制作用；pH值为9的SDBS压裂液对炭质页岩的润湿反转起到了最好的效果，接触角为31.6°。综合分析认为不同浓度、不同pH值的SDBS压裂液对页岩储层特性影响差异较大，说明在对页岩储层的开发利用中，调整SDBS浓度和pH值对提高页岩气开采效果是可行的。
中文关键词:页岩储层  压裂液  SDBS浓度  pH值  储层特性
 
Study on the Effect of Concentrations and pH Values of SDBS Fracturing Fluid on Shale Reservoir Characteristics
Abstract:SDBS fracturing fluid system of different concentrations and pH values will directly affect the stability of shale reservoirs, and then affect created fracture properties in Shale reservoir fracturing processing. Expansion deformation and wetting reverse of shale reservoir under the action of different concentrations and pH values of SDBS fracturing fluid were analyzed. The results showed that: Shale reservoir expansion deformation was minimized and swelling deformation rate was slowest in 0.02% SDBS fracturing fluid. The maximum contact angle of 30° was obtained in 0.03% SDBS fracturing fluid. Shale reservoir expansion deformation was minimized and swelling deformation rate was slowest in SDBS fracturing fluid with pH value of 8. The SDBS fracturing fluid with pH value of 9 and contact angle of 31.6° showed the best wetting reverse effect on carbonaceous shale. Comprehensive analysis showed that the influence of concentrations and pH values of SDBS fracturing fluid on shale reservoir characteristics has been quite different. That means that it is feasible to increase the rate of exploitation of shale gas by adjusting concentration and pH value of SDBS fracturing fluid.
keywords:shale reservoirs  fracturing fluid  concentration of SDBS  pH value  reservoir characteristics
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