疏水缔合聚合物压裂液的制备及性能评价  

Study on Preparation and Performance of Hydrophobic Associating Polymer Fracturing Fluid

作　　者：李必智 LI Bizhi(China Coal Technology Engineering Group Xi'an Research Institute Co.,Ltd.,Xi'an Shaanxi 710000,China)

机构地区：[1]中煤科工西安研究院(集团)有限公司,陕西西安710000

出　　处：《当代化工》2024年第7期1590-1594,1599,共6页Contemporary Chemical Industry

基　　金：山西省科技重大专项项目(项目编号:20221101013)。

摘　　要：随着非常规油气资源开发的迅速发展,水力压裂技术的压裂液性能成为提高油气产量的关键因素。通过合成阳离子型疏水缔合聚合物PDAH,并将其应用于压裂液体系中,系统评价了其在不同条件下的黏弹性、携砂性和静态滤失性能。研究结果表明,新压裂液体系在室温下剪切速率为0.1s^(-1)时黏度达到503 mPa·s,而在100℃、剪切速率为1 000 s^(-1)时黏度仍保持在262 mPa·s,显示出良好的黏弹性能。携砂性实验表明,该体系在低流速条件下能有效携带和分布支撑剂。静态滤失性实验结果显示,30 min内滤失量稳定在18.7 mL,形成的滤饼厚度约为2.1 mm,表明该压裂液体系具有优秀的滤失控制能力。成本效益分析表明,随着压裂液成本增加,油气产量提升,但成本效益比逐渐降低,需要平衡成本和效益以实现最佳组合。该研究为非常规油气藏水力压裂技术提供了新型压裂液体系,具有重要的研究意义和应用价值。With the rapid development of unconventional oil and gas resources,the performance of hydraulic fracturing fluid has become a key factor in increasing oil and gas production.In this study,the cationic hydrophobic associative polymer PDAH was synthesized and applied in the fracturing fluid system,and its viscoelasticity,sand carrying capacity and static fluid loss performance under different conditions were systematically evaluated.The results showed that the viscosity of the new fracturing fluid system reached 503 mPa·s at room temperature when the shear rate was 0.1 s^(-1),and the viscosity remained at 262 mPa·s at 100 ℃ when the shear rate was 1 000 s^(-1),showing good viscoelastic properties.Sand-carrying experiments showed that the system could effectively carry and distribute proppant under low flow rate conditions.The results of the static fluid loss experiment showed that the fluid loss was stable at 18.7 mL within 30 min,and the thickness of the filter cake formed was approximately 2.1 mm,indicating that the fracturing fluid system had excellent fluid loss control capabilities.Cost-benefit analysis showed that as the cost of fracturing fluid increased,oil and gas production increased,but the cost-benefit ratio gradually decreased,and costs and benefits need to be balanced to achieve the best combination.This study provides a new fracturing fluid system for hydraulic fracturing technology in unconventional oil and gas reservoirs,which has important research significance and application value.

关 键 词：疏水缔合聚合物 压裂液体系 黏弹性 携砂性 成本效益 

分 类 号：TQ047[化学工程] TE357.12[石油与天然气工程—油气田开发工程]