Displacement behavior and mechanism of long-term water flooding in sandstone oil reservoirs

Abstract

Sandstone oil reservoirs with huge bottom water and high permeability are generally developed with high flow rate. After long-term water flooding (LTWF), the water flooding characteristics are quite different from that of original reservoir. In this paper, the effects of the PV number, viscosity, and displacement rate during LTWF are studied through experiments. The mechanism is analyzed based on analysis of changes in oil composition, rock mineral composition and wettability. The oil-water relative permeability curves, oil recovery and wettability were obtained with new experiments methods, which avoids the oil metering error by measuring oil and water separately. The research indicates that when the viscosity increases, the water phase permeability decreases, the residual oil saturation increases, and the water content rate increases earlier. A higher water flooding rate results in a higher ultimate recovery. A higher asphaltene content results in a higher viscosity and more oil-wet reservoir conditions. After LTWF, the wettability tends to water-wet, which is more favorable for heavy oil recovery. Moreover, LTWF reduces the clay content, which creates a more water-wet surface and a larger reservoir pore throat environment. This research provides insightful characteristics of offshore sandstone oil reservoirs, which can be used to enhance oil recovery.

Keywords

long-term water flooding / sandstone reservoir / relative permeability curve / wettability

References

[1] DavisR A, McelhineyJ E. Desulfated seawater and its impact on t-SRB activity: An alternative souring control methodology [C]. NACE Annual Conference, Corrosion, 2002, Denver, Colorado, Onepetro, 020282002

[2] BaderM S H. Sulfate removal technologies for oil fields seawater injection operations [J]. Journal of Petroleum Science and Engineering, 2007, 55(1): 93-110 2

[3] ZHOU Wei, ZHANG Jian, FENG Gui-zhi, JIANG Wei, SUN Fu-jie, ZHOU Shou-wei, LIU Yi-gang. Key technologies of polymer flooding in offshore oilfield of Bohai bay [C]//SPE Asia Pacific Oil and Gas Conference and Exhibition. Perth, Australia: Society of Petroleum Engineers, 2008. DOI: https://doi.org/10.2118/115240-ms.

[4] BaderM S H. Innovative technologies to solve oil-fields water injection sulfate problems [J]. Desalination, 2006, 201(1–3): 121-129

[5] KANG Xiao-dong, ZHANG Jian, SUN Fu-jie, ZHANG Feng-jiu, FENG Guo-zhi. A review of polymer EOR on offshore heavy oil field in Bohai Bay, China [C]//SPE Enhanced Oil Recovery Conference. Kuala Lumpur, Malaysia: Society of Petroleum Engineers, 2011. DOI: https://doi.org/10.2118/144932-ms.

[6] SuB-w, DouM-w, GaoX-l, ShangY-w, GaoC-jie. Study on seawater nanofiltration softening technology for offshore oilfield water and polymer flooding [J]. Desalination, 2012, 297: 30-37

[7] CARLL J F. The geology of the oil regions of Warren, Venango, Clarion, and Butler counties: Including surveys of the Garland and Panama Conglomerates in Warren and Crawford, and in Chautauqua Co., NY [M]//Descriptions of Oil Well Rigs and Tools, and a Discussion of the Preglacial and Postglacial Drainage of Lake Erie County Board of Commissioners, 1880.

[8] LeverettM C. Capillary behavior in porous solids [J]. Transactions of the AIME, 1941, 142(1): 152-169

[9] WelgeH J. A simplified method for computing oil recovery by gas or water drive [J]. Journal of Petroleum Technology, 1952, 4(4): 91-98

[10] AndersonW G. Wettability literature survey-part 1: Rock/oil/brine interactions and the effects of core handling on wettability [J]. Journal of Petroleum Technology, 1986, 38(10): 1,125-1,144

[11] BERNARD G G. Effect of floodwater salinity on recovery of oil from cores containing clays [C]//SPE California Regional Meeting. Los Angeles, California: Society of Petroleum Engineers, 1967: SPE-1725-MS. DOI: https://doi.org/10.2118/1725-ms.

[12] LAGER A, COLLINS I R. LoSalTM enhanced oil recovery: Evidence of enhanced oil recovery at the reservoir scale [C]//SPE Symposium on Improved Oil Recovery. Tulsa, Oklahoma, Society of Petroleum Engineers, 2008: SPE-1139676-MS.

[13] VLEDDER P, FONSECA J C, WELLS T, GONZALES I, LIGHTHELM D, PARK K, RIJSWIJK G. Low salinity water flooding: proof of wettability alteration on a field wide scale [C]//SPE Improved Oil Recovery Symposium. Tulsa, Oklahoma: Society of Petroleum Engineers, 2010. DOI: https://doi.org/10.2118/129564-ms.

[14] ChandrasekharS, MohantyK K. Effect of brine composition on oil-rock interaction by atomic force microscopy [J]. Journal of Petroleum Science and Engineering, 2018, 164: 289-301

[15] XiaoR, GuptaR, GlotzbachR C, SinhaS, TeletzkeG F. Evaluation of low-salinity waterflooding in Middle East carbonate reservoirs using a novel, field-representative coreflood method [J]. Journal of Petroleum Science and Engineering, 2018, 163: 683-690

[16] WEBB K J, BLACK C J J, AL-AJEEL H. Low salinity oil recovery-log-inject-log [C]//Middle East Oil Show. Tulsa, Oklahoma: Society of Petroleum Engineers, 2003.

[17] WEBB K J, BLACK C J J, EDMONDS I J. Low salinity oil recoveng-the role of reservior condition corefloods [C]//IOR 2005-13th European Symposium on Improved Oil Recovery Budapest, Hungary: European Association of Geoscientists & Engineers, 2005: cp-12-00045.

[18] RIVET S M. Coreflooding oil displacements with low salinity brine [D]. Austin, Texas: Petroleum and Geosystems Engineering of the University of Texas, 2009.

[19] FJELDE I, ASEN S M, OMEKEH A V. Low salinity water flooding experiments and interpretation by simulations [C]//SPE Improved Oil Recovery Symposium. Tulsa, Oklahoma, USA Society of Petroleum Engineers, 2012: SPE-154142-MS.

[20] NasrallaR A, MahaniH, Van Der LindeH A, MarcelisF H, MasalmehS K, SergienkoE, BrusseeN J, PieterseS G, BasuS. Low salinity waterflooding for a carbonate reservoir: Experimental evaluation and numerical interpretation [J]. Journal of Petroleum Science and Engineering, 2018, 164: 640-654

[21] NUTTING P G. Some physical and chemical properties of reservoir rocks bearing on the accumulation and discharge of oil: Part V. Porosity, permeability, compaction [J]. AAPG Special Volumes, 1934: 825–832.

[22] LeachR O, WagnerO R, WoodH W, HarpkeC F. A laboratory and field study of wettability adjustment in water flooding [J]. Journal of Petroleum Technology, 1962, 14(2): 206-212

[23] DenekasM O, MattaxC C, DavisG T. Effects of crude oil components on rock wettability [J]. Society of Petroleum Engineers, 1959, 216: 330-333

[24] BuckleyJ S, LiuY, XieX-n, MorrowN R. Asphaltenes and crude oil wetting-The effect of oil composition [J]. SPE Journal, 1997, 2(2): 107-119

[25] TavakkoliM, PanugantiS R, VargasF M, TaghikhaniV, PishvaieM R, ChapmanW G. Asphaltene deposition in different depositing environments: Part 1. Model oil [J]. Energy & Fuels, 2014, 28(3): 1617-1628

[26] CaiY, YangL, ZhaoY-h, WangZ-zhang. Variation law of the micro-geological features of the reservoir before and after a long term water flooding in He3 reservoir of Shuanghe oilfield [J]. Petroleum Geology & Oilfield Development in Daqing, 2004, 23(1): 24-26(in Chinese)

[27] GaoP-k, TianH-m, LiG-q, SunH-w, MaTing. Microbial diversity and abundance in the Xinjiang Luliang long-term water-flooding petroleum reservoir [J]. Microbiology Open, 2015, 4(2): 332-342

[28] CAO Ren-yi, SUN Chang-wei, MA Y Z. Modeling wettability variation during long-term water flooding [J]. Journal of Chemistry, 2015, 2015. DOI: https://doi.org/10.1155/2015/592951.

[29] JiS-h, TianC-b, ShiC-f, YeJ-g, ZhangZ-b, FuX-juan. New understanding on water-oil displacement efficiency in a high water-cut stage [J]. Petroleum Exploration and Development, 2012, 39(3): 362-370

[30] DaiZ, JiangJ, LiH-l, CaoR-y, XinJ, LuoD-hong. Wetability experiment of core and mico-mechanism during high-multiple water flooding in heavy oil reservoir [J]. Science Technology an Engineering, 2019, 33(19): 157-163(in Chinese)

[31] YangB-j, ZhengL, ZhangK-y, CuiZ-s, WangX-r, LiX-chun. Study on SARA composition of crude oil by TCL/FID [J]. Chemical Engineering of Oil & GAS, 2011, 40(2): 201-203(in Chinese)

[32] ARGILLIER J F, COUSTET C, HENAUT I. Heavy oil rheology as a function of asphaltene and resin content and temperature [C]//SPE International Thermal Operations and Heavy Oil Symposium and International Horizontal Well Technology Conference. Calgary, Alberta, Canada: Society of Petroleum Engineers, 2002.

[33] CrockerM E, MarchinL M. Wettability and adsorption characteristics of crude-oil asphaltene and polar fractions [J]. Journal of Petroleum Technology, 1988, 40(4): 470-474

[34] StrandS, PuntervoldT, AustadT. Water based EOR from clastic oil reservoirs by wettability alteration: A review of chemical aspects [J]. Journal of Petroleum Science and Engineering, 2016, 146: 1079-1091

[35] WuJ-wen. Study on wettability change with optical contact angle measuring device [J]. Fualt-Block Oil field, 2011, 18(2): 220-222(in Chinese)

[36] HuangS-j, SunC-w, ChangY, ZhaoM-yue. Contact angle alteration for cores under multiplex pore volume water flooding [J]. Science Technology and Engineering, 2016, 16(4): 178-181(in Chinese)

[37] LI Su-mei, ZHANG Ai-yun, WANG Tie-guan. The absorption of oil polar component and reservoir wettability [J]. Geological Science and Technology Information, 1998(4): 66–71. (in Chinese)

[38] ZhangL-h, LuX-c, LiuX-d, YangK, ZhouH-qun. Surface wettability of basal surfaces of clay minerals: Insights from molecular dynamics simulation [J]. Energy & Fuels, 2016, 30(1): 149-160

[39] MAMONOV A, PUNTERVOLD T, STRAND S. EOR by smart water flooding in sandstone reservoirs-effect of sandstone mineralogy on initial wetting and oil recovery [C]//SPE Russian Petroleum Technology Conference. Society of Petroleum Engineers, 2017.

[40] ZHAO Bo, ZHANG Guang-qing, BAI Xiao-hui, ZHUANG Jian-man, LIN Ying, LV Yan-jun, NIE Yuan-xun. The effects of long-term waterflooding on the physical and mechanical properties of tight sandstones [C]//52nd US Rock Mechanics/Geomechanics Symposium. American Rock Mechanics Association, 2018.

[41] TangG-q, MorrowN R. Influence of brine composition and fines migration on crude oil/brine/rock interactions and oil recovery [J]. Journal of Petroleum Science and Engineering, 1999, 24(2–4): 99-111