بررسی اثر اشباع آب اولیه و دما برروی بازیابی نفت در طی آشام خودبه‌خودی و تزریق آب کم‌شور و هوشمند در سنگ مخزن کربناته

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه مهندسی نفت، دانشکده نفت اهواز، دانشگاه صنعت نفت، اهواز، ایران

2 گروه مهندسی نفت، واحد امیدیه، دانشگاه آزاد اسلامی، امیدیه، ایران

3 مرکز تحقیقات نفت، دانشکده نفت اهواز، دانشگاه صنعت نفت، ایران

10.22078/pr.2022.4615.3107

چکیده

تزریق آب کم‌شور به‌عنوان یکی از روش‌های ازدیاد برداشت نفت به‌دلیل ارزانی و محدودیت‌های کم عمیلاتی مورد توجه شایانی قرار گرفته است. دست‌کاری ترکیب و غلظت یون‌های نمک در آب تزریقی می‌تواند بر بازیافت حاصل از فرآیند آشام خودبه‌خودی در مخازن شکاف‌دار و جابه‌جایی اجباری نفت تأثیر به‌سزایی داشته باشد. از این‌رو، تحقیقات آزمایشگاهی و میدانی فراوانی برای درک سازوکارها و عوامل مؤثر بر تزریق آب کم‌شور و هوشمند صورت پذیرفته است. علی‌رغم این تحقیقات، برخی از سازوکارهای فعال و فاکتورهای تعیین‌کننده در مخازن کربناته از جمله میزان اشباع اولیه آب در هاله‌ای از ابهام و به‌صورت کامل شناخته نشده است. بر همین اساس، در مطالعه پیش رو به ارزیابی اثر اشباع آب اولیه در مقادیر بالا و کم در آشام خودبه‌خودی توسط آب کم‌شور و آب هوشمند حاوی یون‌های دوگانه فعال سولفات و منیزیم در مغزه‌های کربناته پرداخته شده است. در ادامه، با تزریق آب‌های مورد نظر به درون سنگ در طی عمیلات سیلاب‌زنی تأثیر دماهای مختلف از جمله دمای معادل و دمای کمتر مخزن بررسی می‌گردد. در بخش آخر با کمک اندازه‌گیری نمودار های تروایی نسبی و فشار مویینگی، سازوکار فعال در آزمایشات مورد توجه قرار می گیرد. نتایج حاکی از آن بود که افزایش اشباع آب اولیه در سنگ‌های کربناته موجب ازدیاد برداشت نفت در طی آشام خودبه‌خودی آب کم‌شور و آب هوشمند در دمای محیط می شود. همچنین، مشاهده شد که افزایش دمای سیستم باعث افزایش میزان تولید نفت در طی تزریق ثانویه توسط آب کم‌شور می‌گردد. کاهش نفت باقی‌مانده در نمودار‌های تراوایی نسبی و فشار موئینگی در اثر وجود یون‌های سولفات و منیزیم تأییدی بر تغییر تر شوندگی سیستم بود.
 

کلیدواژه‌ها


عنوان مقاله [English]

The Impact of Initial Water Saturation and Temperature on Oil Recovery during Spontaneous Imbibition and Injection of Low Salinity Water and Smart Water in Carbonate Reservoir Rocks

نویسندگان [English]

  • Siavash Ashoori 1
  • Mehdi Kavosy Heidary 2
  • Mohammad Abdideh 2
  • Mehdi Sharifi 3
  • Sepideh Veiskarami 3
1 Department of Petroleum Engineering, Ahwaz Faculty of Petroleum, Petroleum University of Technology, Iran
2 Department of Petroleum Engineering, Omidiyeh Branch, Islamic Azad University, Iran
3 Ahwaz Center for Petroleum Research, Ahwaz Faculty of Petroleum, Petroleum University of Technology, Iran
چکیده [English]

In recent years, low salinity water-flooding has received much attention as one of the enhanced oil recovery methods because of its cheapness and low operating limitations. Tuning of injected water composition and concentration can induce a significant effect on the oil recovery during the spontaneous imbibition process and forced oil displacement in the fractured reservoirs. Numerous lab and field studies have been conducted to realize the mechanisms and factors affecting the low salinity and smart water injection. Despite these researches, some of the related mechanisms and determining factors in carbonate reservoirs, such as the initial water saturation and temperature, have not yet been fully understood. Therefore, extensive experiments are needed to optimize the conditions of injected water. In this study, the oil recovery of spontaneous imbibition by low salinity and smart water containing divalent ions has been investigated when the initial water saturations were in relatively small and high amounts in carbonate cores. Then, the coreflooding experiments were conducted with various temperatures, including equivalent and below the reservoir temperature. Based on relative permeability and capillary pressure measurements, the mechanism leading to higher oil recovery during smart water injection was also investigated. The results showed that the oil recovery was increased during spontaneous imbibition of low salinity and smart water under ambient conditions as the initial water saturation increased. It was also observed that elevating the temperature from 80 °C to 105 °C in secondary water injection could improve oil production significantly. The reduction of residual oil saturation in the relative permeability and capillary pressure diagrams due to the presence of sulfate and magnesium ions confirmed that the carbonate rock became more water-wet at the ambient temperature.
 

کلیدواژه‌ها [English]

  • Low salinity water-flooding
  • divalent ions
  • Relative Permeability
  • Multi-ion exchange (MIE)
  • Wettability Alteration
[1]. Chilingar G V, Yen T F (1983) Some notes on wettability and relative permeabilities of carbonate reservoir rocks, II, Energy Sources, 7, 1: 67-75. ##
[2]. Austad T, Strand S, Høgnesen E J, Zhang P (2005) Seawater as IOR fluid in fractured chalk, SPE international symposium on oilfield chemistry, Society of Petroleum Engineers. ##
[3]. Mahani H, Keya A L, Berg S, Bartels W B, Nasralla R, Rossen W R (2015) Insights into the mechanism of wettability alteration by low-salinity flooding (LSF) in carbonates, Energy and Fuels, 29, 3: 1352-1367. ##
[4]. Rashid S, Mousapour M S, Ayatollahi S, Vossoughi M, Beigy A H (2015) Wettability alteration in carbonates during “Smart Waterflood”: Underlying mechanisms and the effect of individual ions, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 487: 142-153. ##
[5]. Derkani M H, Fletcher A J, Fedorov M, Abdallah W, Sauerer B, Anderson J, Zhang Z J (2019) Mechanisms of surface charge modification of carbonates in aqueous electrolyte solutions, Colloids and Interfaces, 3, 4: 62. ##
[6]. Sohal M A, Thyne G, Søgaard E G (2016) Review of recovery mechanisms of ionically modified waterflood in carbonate reservoirs, Energy and Fuels, 30, 3: 1904-1914. ##
[7]. Bartels W B, Mahani H, Berg S, Hassanizadeh S M (2019) Literature review of low salinity waterflooding from a length and time scale perspective, Fuel, 236: 338-353. ##
[8]. Karimi M, Al-Maamari R S, Ayatollahi S, Mehranbod N (2016) Impact of sulfate ions on wettability alteration of oil-wet calcite in the absence and presence of cationic surfactant, Energy and Fuels, 30, 2: 819-829. ##
[9]. Purswani P, Karpyn Z T (2019) Laboratory investigation of chemical mechanisms driving oil recovery from oil-wet carbonate rocks, Fuel, 235: 406-415. ##
[10]. Boumedjane M, Karimi M, Al-Maamari R S, Aoudia M (2019) Experimental investigation of the concomitant effect of potential determining ions Mg+2/SO4−2 and Ca+2/SO4−2 on the wettability alteration of oil-wet calcite surfaces, Journal of Petroleum Science and Engineering, 179: 574-585. ##
[11]. Saram M N (2021) The effect of low-salinity water on wettability and oil recovery by core flooding test: a case study in the shadegan oil field, Journal of Petroleum Science and Technology, 11, 30: 53-62. ##
[12]. بهالو هوره م، قربانی‌زاده س، رستمی ب (1398) بررسی اثر حلالیت ترکیبات نفت خام در آب بر ترشوندگی سطح نفت دوست کلسیت در فرآیند تزریق آب کم‌شور، پژوهش نفت، 29، 107: 110-99. ##
[13]. Austad T, Strand S, Puntervold T (2009) Is wettability alteration of carbonates by seawater caused by rock dissolution, the International Symposium of the Society of Core Analysts held in Noordwijk, The Netherlands, 27-30. ##
[14]. Strand S, Høgnesen E J, Austad T (2006) Wettability alteration of carbonates—Effects of potential determining ions (Ca+2 and SO4−2) and temperature, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 275, 1-3: 1-10. ##
[15]. Fathi S J, Austad T, Strand S (2012) Water-based enhanced oil recovery (EOR) by “smart water”: Optimal ionic composition for EOR in carbonates, Energy and fuels, 25, 11: 5173-5179. ##
[16]. Zhang P, Austad T (2006) Wettability and oil recovery from carbonates: Effects of temperature and potential determining ions, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 279, 1-3: 179-187. ##
[17]. Gandomkar A, Rahimpour M R (2017) The impact of monovalent and divalent ions on wettability alteration in oil/low salinity brine/limestone systems, Journal of Molecular Liquids, 248: 1003-1013. ##
[18]. Zhang P, Tweheyo M T, Austad T (2006) Wettability alteration and improved oil recovery in chalk: The effect of calcium in the presence of sulfate, Energy and Fuels, 20, 5: 2056-2062. ##
[19]. Zaeri M R, Hashemi R, Shahverdi H, Sadeghi M (2018) Enhanced oil recovery from carbonate reservoirs by spontaneous imbibition of low salinity water, Petroleum Science, 15, 3: 564-576. ##
[20]. Tang G Q, Firoozabadi A (2001) Effect of pressure gradient and initial water saturation on water injection in water-wet and mixed-wet fractured porous media, SPE Reservoir Evaluation and Engineering, 4, 6: 516-524. ##
[21]. Karimaie H, Torsæter O (2007) Effect of injection rate, initial water saturation and gravity on water injection in slightly water-wet fractured porous media, Journal of Petroleum Science and Engineering, 58, 1-2: 293-308. ##
[22]. Viksund B G, Morrow N R, Ma S, Wang W, Graue A (1998) Initial water saturation and oil recovery from chalk and sandstone by spontaneous imbibition, International Symposium of Society of Core Analysts, The Hague. ##
[23]. Hognesen E J, Strand S, Austad T (2005) Waterflooding of preferential oil-wet carbonates: oil recovery related to reservoir temperature and brine composition, SPE Europec/EAGE annual conference, Spain. ##
[24]. Tweheyo M T, Zhang P, Austad T (2006) The effects of temperature and potential determining ions present in seawater on oil recovery from fractured carbonates, SPE/DOE Symposium on Improved Oil Recovery, USA. ##
[25]. Zhang Y, Sarma H K (2012) Improving waterflood recovery efficiency in carbonate reservoirs through salinity variations and ionic exchanges: A promising low-cost Smart-Waterflood approach, International Petroleum Conference and Exhibition, Abu Dhabi. ##
[26]. Katende A, Sagala F (2019) A critical review of low salinity water flooding: mechanism, laboratory and field application, Journal of Molecular Liquids, 278: 627-649. ##
[27]. Montazeri M, Fazelabdolabadi B, Shahrabadi A, Nouralishahi A, HallajiSani A, Moosavian S M A (2020) An experimental investigation of smart-water wettability alteration in carbonate rocks–oil recovery and temperature effects, Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 1-13. ##
[28]. Sohal, M. A., Thyne, G., and Søgaard, E. G. (2017) Effect of the temperature on wettability and optimum wetting conditions for maximum oil recovery in a carbonate reservoir system, Energy and Fuels, 31, 4: 3557-3566. ##
[29]. Anderson W G (1987) Wettability literature survey part 5: The effects of wettability on relative permeability, Journal of Petroleum Technology, 39, 11: 1453-1468. ##
[30]. Rao N D, Girard M, Sayegh S G (1992) Impact of miscible flooding on wettability, relative permeability, and oil recovery, SPE Reservoir Engineering Journal, 7, 2: 204-212. ##
[31]. Shaker Shiran B, Skauge A (2013) Enhanced oil recovery (EOR) by combined low salinity water/polymer flooding, Energy and Fuels, 27, 3: 1223-1235. ##
[32]. Shojaei M J, Ghazanfari M H, Masihi M (2015) Relative permeability and capillary pressure curves for low salinity water flooding in sandstone rocks, Journal of Natural Gas Science and Engineering, 25: 30-38. ##
[33]. Feldmann F, Strobel G J, Masalmeh S K, AlSumaiti A M (2020) An experimental and numerical study of low salinity effects on the oil recovery of carbonate rocks combining spontaneous imbibition, Centrifuge Method and Coreflooding Experiments, Journal of Petroleum Science and Engineering, 190: 107045. ##
[34]. Hematpour H, Parvazdavani M, Abbasi S, Mahmood S M (2016) Investigation of low saline water’s effects on relative permeability in carbonate reservoir, Jurnal Teknologi, 78: 10. ##
[35]. Su W, Liu Y, Gao Z, Yang L, Yang R, Mcharo W, Tang R (2019) Relative permeability variations during low salinity water flooding in carbonate rocks with different mineral compositions, Journal of Dispersion Science and Technology, 41, 2: 227-234. ##
[36]. Speight J (2014) The chemistry and technology of petroleum, 5th Edition, Boca Raton, CRC Press. ##
[37]. Zhang P, Austad T (2005) The relative effects of acid number and temperature on chalk wettability, SPE International Symposium on Oilfield Chemistry, the Woodlands, Texas. ##
[38]. Honarpour M, Mahmood S M (1988) Relative-permeability measurements: An overview, Journal of Petroleum Technology, 40, 8: 963-966. ##
[39]. Kim C, Lee J (2017) Experimental study on the variation of relative permeability due to clay minerals in low salinity water-flooding, Journal of Petroleum Science and Engineering, 151: 292-304. ##
[40]. Safavi M S, Masihi M, Safekordi A A, Ayatollahi S, Sadeghnejad S (2020) Effect of SO4−2 ion exchanges and initial water saturation on low salinity water flooding (LSWF) in the dolomite reservoir rocks, Journal of Dispersion Science and Technology, 41, 6: 841-855. ##
[41]. Fathi S J, Austad T, Strand S (2010) “Smart water” as a wettability modifier in chalk: the effect of salinity and ionic composition, Energy and fuels, 24, 4: 2514-2519. ##
[42]. Zaeri M R, Shahverdi H, Hashemi R, Mohammadi M (2019) Impact of water saturation and cation concentrations on wettability alteration and oil recovery of carbonate rocks using low-salinity water, Journal of Petroleum Exploration and Production Technology, 9, 2: 1185-1196. ##
[43]. Yu L, Evje S, Kleppe H, Karstad T, Fjelde I, Skjaeveland S M (2008) Analysis of the wettability alteration process during seawater imbibition into preferentially oil-wet chalk cores, SPE Symposium on Improved Oil Recovery, Oklahoma, USA. ##
[44]. Lashkarbolooki M, Ayatollahi S, Riazi M (2017) Mechanistical study of effect of ions in smart water injection into carbonate oil reservoir, Process Safety and Environmental Protection, 105: 361-372. ##
[45]. RezaeiDoust A, Puntervold T, Strand S, Austad T (2009) Smart water as wettability modifier in carbonate and sandstone: A discussion of similarities/differences in the chemical mechanisms, Energy and fuels, 23, 9: 4479-4485. ##
[46]. Gupta R, Smith G G, Hu L, Willingham T, Lo Cascio M, Shyeh J J, Harris C R (2011) Enhanced waterflood for carbonate reservoirs-impact of injection water composition, SPE Middle East oil and gas show and conference, Bahrain. ##
[47]. Thomas M M, Clouse J A, Longo J M (1993) Adsorption of organic compounds on carbonate minerals: 1, Model compounds and their influence on mineral wettability, Chemical geology, 109, 1-4: 201-213. ##
[48]. Hjelmeland O S, Larrondo L E (1986) Experimental investigation of the effects of temperature, pressure, and crude oil composition on interfacial properties, SPE Reservoir Engineering, 1, 4: 321-328. ##
[49]. Hamouda A A, Karoussi O (2008) Effect of temperature, wettability and relative permeability on oil recovery from oil-wet chalk, Energies, 1, 1: 19-34. ##
[50]. Boumedjane M, Karimi M, Al-Maamari R S, Aoudia M (2019) Experimental investigation of the concomitant effect of potential determining ions Mg+2/SO4−2 and Ca2+/SO42− on the wettability alteration of oil-wet calcite surfaces, Journal of Petroleum Science and Engineering, 179: 574-585. ##
[51]. Uetani T, Kaido H, Yonebayashi H (2020) Effect of total acid number and recovery mode on low-salinity EOR in carbonates, SPE Reservoir Evaluation and Engineering, 25, 2: 331–348. ##
[52]. Park H, Park Y, Lee Y, Sung W (2018) Efficiency of enhanced oil recovery by injection of low-salinity water in barium-containing carbonate reservoirs, Petroleum Science, 15, 4: 772-782. ##
[53]. Wheaton R (2016) Fundamentals of applied reservoir engineering: appraisal, economics and optimization, Gulf Professional Publishing. ##
[54]. Andersen P (2018) Capillary Pressure Effects on Estimating the EOR Potential during Low Salinity and Smart Water Flooding, SPE Journal, 25, 1: 481–496. ##