مطالعه آزمایشگاهی آسیب سازند ناشی از نشست رسوب آسفالتین در نفت خام‌های با محتوای آسفالتین پایین

نوع مقاله: مقاله پژوهشی

نویسندگان

1 پژوهشکده مهندسی نفت، پردیس توسعه صنایع بالادستی نفت، پژوهشگاه صنعت نفت، تهران، ایران

2 دانشکده مهندسی شیمی، دانشگاه سمنان، ایران

چکیده

در این مقاله، سیستم آزمایشگاهی نشست دینامیکی آسفالتین بر روی مغزه در فرآیند تخلیه طبیعی تهیه گردیده و طی انجام آزمایشات تخلیه طبیعی، تحت دما و فشار مخزن اثر کاهش فشار و میزان آسفالتین اولیه موجود در نفت، در نشست آسفالتین بر روی مغزه مورد بررسی قرار گرفت. در این تحقیق از دو نمونه نفت زنده از مخازن نفتی ایران، با محتوای آسفالتین پایین استفاده شد. نتایج آزمایش که در دبی ثابت نفت تزریقی و در سه مرحله فشاری در هر مورد نفت خام انجام شده است نشان می‌دهد که با کاهش فشار در نزدیکی نقطه حباب مخزن شاهد ایجاد نشست آسفالتین بر روی مغزه خواهیم بود و مشاهدات تایید می‌نمایند، مکانیسم آسیب سازند از نوع نشست سطحی ذرات و انسداد گلوگاهی می‌باشد. در ضمن در بازه‌ای از زمان تزریق، همراه بردگی رسوبات توسط جریان سیال مشاهده می‌گردد. در‌خصوص نفت‌های با محتوای آسفالتین پایین‌تر، نشست سطحی بیشتر غالب است و سرعت نشست ذرات یکنواخت و ثابت است در حالی‌که هر چه قدر محتوای اولیه آسفالتین در نفت خام بیشتر می‌شود مکانیسم انسداد گلوگاهی نیز در کاهش تراوایی نقش موثرتری خواهد داشت. 
 

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Experimental Investigation of Formation Damage due to Asphaltene Deposition in Crude Oils with Low Asphaltene Content

نویسندگان [English]

  • Abbas Shahrabadi 1
  • Kamran Parizad 2
  • Masoud Nasiri 2
  • Saeed Abbasi 1
1 Petroleum Engineering Research Division, Research Institute of Petroleum Industry (RIPI), Tehran, Iran
2 Chemical Engineering Department, Semnan University, Iran
چکیده [English]

In this paper, a setup for performing dynamic flow experiments was prepared. A set of natural depletion tests were done to investigate the effects of pressure depletion and the initial asphaltene content of crude oils on asphaltene deposition in porous media using two live oil samples of Iranain reservoirs. The results of these experiments, which were done in constant rate and three pressure steps, show that the asphaltene deposition occurs by decreasing pressure in the vicinity of bubble point pressure and the main mechanisms are surface deposition, pore throat plugging and in some period the entrainment of the particles via the flow of oil is observed. According to the experiments, in case of the oils with less asphaltene content, the dominant mechanism is surface deposition, and the rate of deposition is uniform, while using the crude oil with higher asphaltene content, the pore throat plugging mechanism has more important role in the permeability reduction of reservoir rock.
 

کلیدواژه‌ها [English]

  • Asphaltene Deposition
  • Natural Depletion
  • Formation Damage
  • Mechanism
  • Asphaltene Content

[1]. Kawanaka S., Park S. J. and Mansoori G. A., “Organic deposition from reservoir fluids,” SPE Reservoir Engineering Journal, pp. 185-192, May 1991.##

[2]. Gholoum E. F., Oskui G. P. and Salman M., “Investigation of asphaltene precipitation onset conditions for Kuwait reservoir,” SPE 81571, Presented at the SPE 13th Middle East Oil Show and Conference, Bahrain, April 5-8, 2003.##

[3]. Al-Sahhaf T. A., Fahim M. A. and Elkilani A. S., “Retardation of asphaltene precipitation by addition of toluene, resins, deasphalted oil and surfactants,” Fluid Phase Equilibria, pp. 194-197, 2001.##

[4]. Yin Y. R., Yen A. T. and Asomaning S., “Asphaltene inhibitor evaluation in CO2 floods: laboratory study and field testing,” SPE 59706, Presented at the 2000 SPE Permian Basin Oil and Gas Recovery Conference, Midland, Texas, March 21-23, 2000.##

[5]. Kokal S. and Sayegh S. G., “Asphaltenes: the cholesterol of petroleum,” SPE 29878, Presented at the SPE  Middle East Oil Show and Conference, Bahrain, March 11-14, 1995.##

[6]. Kokabas I., “Characterization of asphaltene precipitation effect on reducing carbonate rock permeability,SPE 81572, , Presented at the SPE 13th Middle East Oil Show and Conference, Bahrain, April 5-8 2003.##

[7]. Samra H. K., “Can we ignore asphaltene in a gas injection project for light oils?,” SPE 84877, Presented at the SPE International Improved Oil Recovery Conference in Asia Pacific, Kuala Lumpur, Malaysia, October 20-21 2003. ##

[8]. Zekri A. Y. and Al-Mehaideb R., “Steam/Bacteria to treatment of asphaltene deposition in carbonate rocks,Journal of Petroleum Science and Engineering, Vol.37, Elsevier, 123-133 2003.##

[9]. Kokal S., Davood N., Fontanilla J., Al-Ghamdi A., Nasr-El-Din H. and Al-Rufaie Y., “Productivity decline in oil wells related to asphaltene precipitation and emusion blocks, SPE 77767. Presented at the SPE Annual Technical Conference and Exhibition, San Antonio, Texas, September 29-October 2, 2002.##

[10]. Shedid S. A., “Influences of asphaltene deposition on rock/fluid properties of low permeability carbonate reservoir,” SPE 68229, Presented at the 2001 SPE Middle East Oil Show, Bahrain, March 17-20 2001.##

[11]. Mohammed M. A., “Effect of scale and corrosion inhibitors on well productiviy in reservoirs containing asphaltenes,” Journal of Petroleum Science and Engineering, Vol. 46, pp. 243-252 2005.##

[12]. Kamath V. A., Yang J. and Sharma G. D, Effect of asphaltene  deposition on dynamic displacement of oil by water, SPE  26046,  Western  Regional  Meeting, Alaska, Anchorage, pp. 179-87, May 26-28, 1993.##

[13]. De Pedroza T. M., Calderon G. and Rico A., “Impact of asphaltene presence in some rock properties,” SPE 27069, SPE Advanced Technology Series, Vol. 4, No.1, 1995. ##

[14]. Piro G., Barberis L., Galbariggi G., Bertero L. and Camiani C., “Experimental study on asphaltene adsorption  onto formation rock: an approach to asphaltene formation damage prevention,” SPE 30109, the European Formation Damage Conference held in the Hague, The Netherlands, 15-16 May, 1995.##

[15]. Ali M. A. and Islam M. R., “The effect of asphaltene precipitation on carbonate-rock-ermeability: an experimental and numerical approach,” SPE Production & Facilities, Vol. 13, Issue 3, August ,DOIhttps://doi.org/10.2118/50963-PA, 1998.##

[16]. Wang S. and Civan F., “Preventing asphaltene deposition in oil reservoirs by early water injection,” SPE 94268, Oklohamacity, Oklohama, pp. 1-16, 2005.##

[17]. Mousavi Dehghani S. A., Vafaie Sefti Mirzayi M., Mirzayi B. and Fasih M., “Experimental investigation on asphaltene deposition in porous media during miscible gas injection,” Iran J. Chem. Eng, Vol. 26, No. 4, pp. 39-48 2007.##

[12]. Bagheri M. B., Kharrat R. and Ghotby C., “Experimental investigation of the asphaltene deposition process during different production schemes,” Oil and Gas Science and Technology – Review, IFP Energies nouvelles, Vol. 66, No. 3, pp. 507-519, 2011.##

[19]. Kord S., Miri R., Ayatollahi S. and Escrochi M., “Asphaltene deposition in carbonate rocks: experimental investigation and numerical simulation,” Energy & Fuels, Vol. 26, No. 10, 2012.##

[20]. Zendehboudi S., Shafiei A., Bahadori A. R., James L. A., Elkamel A. and Lohi A., “Asphaltene precipitation and deposition in oil reservoirs Technical aspects, experimental and hybrid neural network predictive tools,” Chemical Engineering Research and Design, Vol. 92, Issue 5, pp. 857-875, 2014.

[21]. Jafari Behbahani T., Ghotbi C., Taghikhani V. and Shahrabadi A., “Investigation of asphaltene adsorption in sandstone core sample during CO2 injection: Experimental and modified modeling,” Fuel, Vol. 133, pp. 63-72, 2014.

[22]. de Boer R. B., Leeriooyer K., Elgner M. R. P. and Van Bergen A. R. D., “Screening of crude  oils for asphalt precipitation: theory, practice, and the selection of inhibitors,” Journal of the Society of Petroleum Engineers (SPE) Production & Facilities, Vol. 10, Issue 1, pp. 57-61, Feb. 1995.

[23]. Jafari Behbahani T., Ghotbi C., Taghikhani V. and Shahrabadi A., “Asphaltene deposition under dynamic conditions in porous media: theoretical and experimental investigation,” Energy and Fuels, Vol. 27, pp 622–639,  January 9, 2013.

[24]. Hashemi S. I., Fazelabdolabadi B., Moradi S., Rashidi A. M., Shahrabadi A. and Bagherzadeh H., “On the application of NiO nanoparticle to mitigate in situ asphaltene deposition in carbonated matrix,” App Nanosci, Vol. 6, No. 1, pp. 71-81, 2016.

[25]. Kashefi S., Shahrabadi A., Lotfollahi M. N. and Varamesh A., “A new polymeric additive as asphaltene deposition inhibitor in CO2 core flooding, Korean Journal of Chemistry Engineering, Vol. 33, No. 11, pp. 3273-3280 2016.

[26]. Bagherzadeh H., Golghanddashti H. and Shahrabadi A., A proposed systematic approach for experimental asphaltene investigation: an oil reservoir case study, SPE Production and Operation, Vol. 33, Issue 1, February 2018.