ارزیابی خواص رئولوژیکی هیدروژل‌های مبتنی بر پلیمر زانتان در حضور نانوذره

نوع مقاله : پژوهشی اصیل

نویسندگان

1 گروه مهندسی نفت، دانشکده مهندسی شیمی، دانشگاه تربیت مدرس، تهران، ایران

2 گروه مهندسی نفت، پژوهشگاه شیمی و مهندسی شیمی ایران، تهران، ایران

چکیده
یکی از مسائلی که در ارتباط با تولید نفت دچار مشکل شده است، تولید آب است که سبب کاهش عمر تولید از مخازن و چاه‌های نفت می‌شود. امروزه برای عملیات کنترل تولید آب در مخزن از روش تزریق ژل پلیمر استفاده می‌شود. از این‌رو، در این مطالعه سعی شده است که با توجه به مخازن ایران و همچنین به علت وجود مشکلات زیست محیطی در زمینه‌ی پلیمرهای سنتزی، ویژگی رئولوژیکی هیدروژل‌های بر پایه‌ی زانتان بررسی شود. استحکام و پایداری هیدروژل‌ها با تغییر شرایط محیطی به صورت تابعی از زمان و نرخ برش قابل بررسی است. بدین منظور، خواص ویسکوالاستیک هیدروژل‌ها شامل مدول الاستیک و ویسکوز نسبت به دما، زمان و نرخ تغییر شکل برای محلول ژلانت مورد مطالعه قرار گرفته است. همچنین تاثیر ترکیبات هیدروژل‌ها شامل غلظت پلیمر، نسبت وزنی عامل شبکه‌کننده به پلیمر و درصد وزنی نانوذرات سیلیکا در بررسی خواص رئولوژیکی مد نظر قرار گرفته است. علاوه‌براین، زمان ژل شدن به عنوان یکی از مهم‌ترین پارامتر تعیین‌کننده هیدروژل در طول تزریق در محیط متخلخل، بررسی شده است.

کلیدواژه‌ها

موضوعات


عنوان مقاله English

Rheological properties evaluation of hydrogels based on xanthan polymer in the presence of nanoparticles

نویسندگان English

Raziyeh Dastjani-Farahani 1
Arezou Jafari 1
Mohsen Vafaie-Sefti 1
Naser Asadzadeh 1
Mahsa Baghban-Salehi 2
1 Department of Petroleum Engineering, Faculty of Chemical Engineering, Tarbiat Modares University, Tehran, Iran
2 Petroleum Engineering Department, Chemistry & Chemical Engineering Research Center of Iran, Tehran, Iran
چکیده English

One of the problems related to oil recovery is water production, which reduces the production life of oil reservoirs and wells. Nowadays, the polymer gel injection method is used to control water production in the reservoir. In this study, an attempt has been made to investigate the rheological properties of xanthan-based hydrogels, considering Iran's reservoirs and also due to the existence of environmental problems in the field of synthetic polymers. The strength and stability of hydrogels can be applied by changing environmental conditions as a function of time and shear rate. For this purpose, the viscoelastic properties of hydrogels, including the elastic and viscous modulus, have been studied in relation to temperature, time and deformation rate for the gelant solution. Also, the effect of the composition of hydrogels, including the polymer concentration, the weight ratio of the crosslinking agent to the polymer, and the weight percentage of silica nanoparticles was considered in the study of rheological properties. Additionally, gelation time has been studied as one of the most important determining parameters of hydrogel during injection in porous medium.

کلیدواژه‌ها English

Rheology
Hydrogel
Polymer
xanthan gum
Nanoparticles
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