بررسی آزمایشگاهی تشکیل رسوب سولفات استرانسیم در سیستم‌های تزریق مخلوط آب دریا و آب تولیدی مخزن در یکی از مخازن کربناته و مطابقت آن با مدل ژاکس

نوع مقاله : مقاله پژوهشی

نویسندگان

پژوهشکده ازدیاد برداشت از مخازن نفت و گاز، تهران، ایران

چکیده

هر گاه در میادین نفتی دریایی از مخلوط آب دریا و آب تولیدی برای فشارافزایی مخزن و یا افزایش ضریب بازیافت نفت استفاده می‏شود، تمهیدات لازم برای کنترل تشکیل رسوب‏های معدنی نیز باید در نظر گرفته شود. در صورت ناسازگاری بین آب تزریقی و آب تولیدی، مشکلاتی مانند تخریب سازند و گرفتگی لوله‏های مغزی چاه‏ها و خطوط انتقال اجتناب‏ناپذیر خواهند بود. در این تحقیق تشکیل رسوب سولفات استرانسیم در مخلوط آب تولیدی چاه و آب دریا به نسبت‏های مختلف در شرایط دمایی یکی از مخزن های جنوب کشور بررسی شده است. نتایج نشان میدهد که هر چه نسبت آب تولیدی به آب دریا بیش‏تر باشد، تشکیل رسوب شدت می‏یابد. در شرایط اختلاط 60 درصد آب دریا و 40 درصد آب تولیدی، تشکیل سولفات استرانسیم حداکثر است. محاسبات حاصل از مدل ژاکس برای پیش‏بینی مقدار و نوع رسوب تطابق خوبی با نتایج گزارش‏شده میدانی نشان می‏دهد. مقدار رسوب در فرآیند تزریق آب تابعی از نسبت اختلاط آب‏هاست
 

کلیدواژه‌ها


عنوان مقاله [English]

Experimental Studies on Strontium Sulfate Formation for Reservoir Injection Systems using Mixture of Seawater / Produced water in one of Carbonate Reservoirs and its Conformance the Jacques Model

نویسندگان [English]

  • Habib Gholamianpour
  • Emad Roayaei
  • Mohammad Ali Emadi
IOR Research Institute, Tehran, Iran
چکیده [English]

In off-shore fields, whenever a mixture of sea water and produced water is used for reservoir pressure maintenance and, or recovery factor improvement, necessary precaution should be considered for the control of mineral scale formation. Incompatibility between sea water and produced water causes serious problems; such as, formation damage as well as flow restriction in producing wellbore and pipelines. In this project, experimental studies have been carried out as to investigate strontium sulfate scale due to the mixtures sea water and produced water under the temperature reservoir. Results have been shown  when the ratio of produced water to sea water is increased, strontium sulfate formation intensifies. With the mixture of %60 sea water and %40 produced water, scale Formation is Maximum. Furthermore, experimental results have had reasonable match with the Jacques model.
 

کلیدواژه‌ها [English]

  • Incompatibility
  • Formation Damage
  • Water Injection
  • Strontium Sulfate
  • Jacques Model
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