Petroleum Exploration and Development >
Characteristics and EOR mechanisms of nanofluids permeation flooding for tight oil
Received date: 2019-10-30
Revised date: 2020-06-02
Online published: 2020-08-28
Supported by
Supported by the CNPC Science and Technology Major Project (2019E-2607), and RIPED Discipline Construction Project(yjxk2019-12)
Tight oil reservoir development is faced with the key technical problem that "water cannot be injected and oil cannot be produced" yet. With the diphenyl ethers water-soluble (gemini) surfactants as water phase shell and C10-C14 straight-chain hydrocarbon compounds as oil phase kernel, a nanofluids permeation flooding system was prepared by microemulsion technology, and its characteristics and EOR mechanisms were evaluated through experiments. The system has the following five characteristics: (1) "Small-size liquid": the average particle size of the system is less than 30 nm, which can greatly reduce the starting pressure gradient of water injection, and effectively enter and expand the sweep volume of micro-nano matrix; (2) "Small-size oil" : the system can break the crude oil into "small-size oil" under the flow condition, which can greatly improve the percolation ability and displacement efficiency of the crude oil in the micro-nano matrix; (3) Dual-phase wetting: the system has contact angles with the water-wet and oil-wet interfaces of (46±1)° and (68±1)° respectively, and makes it possible for capillarity to work fully under complex wetting conditions of the reservoir; (4) High surface activity: the interfacial tension between the system and crude oil from a tight oil reservoir in Xinjiang is 10 -3-10 -2 mN/m, indicating the system can effectively improve the displacement efficiency of oil in fine pore throats; (5) Demulsification and viscosity reduction: the system has a demulsification and viscosity reduction rate of more than 80% to inversely emulsified crude oil from a tight oil reservoir in Xinjiang, so it can improve the mobility of crude oil in the reservoir and wellbore. The system can be used to increase oil production by fracturing in tight reservoirs, replenish formation energy by reducing injection pressure and increasing injection rate, and enhance oil recovery by displacement and cyclic injection, providing key technical support for effective production and efficient development and recovery enhancement of tight reservoirs.
Bin DING , Chunming XIONG , Xiangfei GENG , Baoshan GUAN , Jingjun PAN , Jianguo XU , Jingfeng DONG , Chengming ZHANG . Characteristics and EOR mechanisms of nanofluids permeation flooding for tight oil[J]. Petroleum Exploration and Development, 2020 , 47(4) : 810 -819 . DOI: 10.1016/S1876-3804(20)60096-9
| [1] | JIA Chengzao . Breakthrough and significance of unconventional oil and gas to classical petroleum geological theory. Petroleum Exploration and Development, 2017,44(1):1-11. |
| [2] | YANG Hua, LIANG Xiaowei, NIU Xiaobing , et al. Geological conditions for continental tight oil formation and the main controlling factors for the enrichment: A case of Chang 7 Member, Triassic Yanchang Formation, Ordos Basin, NW China. Petroleum Exploration and Development, 2017,44(1):12-20. |
| [3] | American Association of Petroleum Geologists, Energy Minerals Division. Unconventional energy resources: 2017 review. Natural Resources Research, 2019,28:1661-1751. |
| [4] | HU Wenrui, WEI Yi, BAO Jingwei . Development of the theory and technology for low permeability reservoirs in China. Petroleum Exploration and Development, 2018,45(4):685-697. |
| [5] | WU Ruoxia. Development characteristics and matching technology of low permeability oilfield: The development techniques of the low permeability reservoir: Selected papers of National Symposium on low permeability oilfield development technology. Beijing: Petroleum Industry Press, 1994: 80-88. |
| [6] | YANG Manping, REN Baosheng, JIA Yumei . Classification and development characteristics of low-flow reservoirs. Special Oil and Gas Reservoirs, 2006,13(4):48-50. |
| [7] | HU Suyun, ZHU Rukai, WU Songtao , et al. Profitable exploration and development of continental tight oil in China. Petroleum Exploration and Development, 2018,45(4):737-748. |
| [8] | FANG Wenchao, JIANG Hanqiao, LI Junjian , et al. A numerical simulation model for multi-scale flow in tight oil reservoirs. Petroleum Exploration and Development, 2017,44(3):415-422. |
| [9] | ZHOU Fujian, SU Hang, LIANG Xingyuan , et al. Advances in hydraulic fracturing techniques to maximize oil recovery from tight rocks. Petroleum Exploration and Development, 2019,46(5):1007-1014. |
| [10] | WANG Hongjun, MA Feng, TONG Xiaoguang , et al. Assessment of global unconventional oil and gas resources. Petroleum Exploration and Development, 2016,43(6):850-862. |
| [11] | HU Y, WEIJERMARS R, ZUO L , et al. Benchmarking EUR estimates for hydraulically fractured wells with and without fracture hits using various DCA methods. Journal of Petroleum Science and Engineering, 2018,162:617-632. |
| [12] | SHENG J J . What type of surfactants should be used to enhance spontaneous imbibition in shale and tight reservoirs. Journal of Petroleum Science and Engineering, 2017,159:635-643. |
| [13] | LIU He, JIN Xu, DING Bin . Application of nanotechnology in petroleum exploration and development. Petroleum Exploration and Development, 2016,43(6):1014-1021. |
| [14] | PU W, WEI B, JIN F , et al. Experimental investigation of CO2, huff-n-puff process for enhancing oil recovery in tight reservoirs. Chemical Engineering Research and Design, 2016,111:269-276. |
| [15] | LIANG T, ACHOUR S H, LONGORIA R A , et al. Flow physics of how surfactants can reduce water blocking caused by hydraulic fracturing in low permeability reservoirs. Journal of Petroleum Science and Engineering, 2017,157:631-642. |
| [16] | LI Y, POPE G A, LU J , et al. Scaling of low-interfacial-tension imbibition in oil-wet carbonates. SPE Journal, 2017,22(5):1349-1361. |
| [17] | LI Y . Experimental investigation of imbibitions in oil-wet carbonates under low IFT conditions. Texas: University of Texas at Austin, 2016: 110-168. |
| [18] | OLAJIRE A A . Review of ASP EOR (alkaline surfactant polymer enhanced oil recovery) technology in the petroleum industry: Prospects and challenges. Energy, 2014,77:963-982. |
| [19] | HE Jianping . Microstructure and rheological properties of Carboxymethyl Guar gum solution with high degree of substitution. Chemical Research and Application, 2019,31(3):550-554. |
| [20] | LIAO Zihan, CHEN Fu, BU Tao , et al. Study on drag reduction mechanism of water-in-water emulsion drag reduction agent. Petroleum Technology, 2019,48(7):724-730. |
| [21] | LIANG T B, LI Q G, LIANG X Y , et al. Evaluation of liquid nanofluid as fracturing fluid additive on enhanced oil recovery from low-permeability reservoirs. Journal of Petroleum Science and Engineering, 2018,168(9):390-399. |
| [22] | FENG Cheng, SHI Yujiang, HAO Jianfei , et al. Nuclear magnetic resonance features of low-permeability reservoirs with complex wettability. Petroleum Exploration and Development, 2017,44(2):252-257. |
| [23] | YU Fuwei, JIANG Hanqiao, FAN Zhen , et al. Features and imbibitions mechanisms of Winsor Ⅰ type surfactant solution in oil-wet porous media. Petroleum Exploration and Development, 2019,46(4):950-958. |
| [24] | LIANG T, ZHOU F, LU J . Evaluation of wettability alteration and IFT reduction on mitigating water blocking for low-permeability oil-wet rocks after hydraulic fracturing. Fuel, 2017,209(23):650-660. |
| [25] | GENG Xiangfei, DING Bin, LUO Jianhui , et al. Nonionic gemini surfactant of (Octylphenol polyoxyethylene ether disubstituted) dicarboxylic acid diphenyl ether and its synthesis: 201910001670.8. 2019-04-26. |
| [26] | GENG Xiangfei, DING Bin, LUO Jianhui , et al. N,N,N°,N°- tetradodecyl-substituted diphenyl ether sulfonate anionic Gemini surfactant and synthesis thereof: 201910001658.7. 2019-06-07. |
| [27] | DING Bin, GENG Xiangfei, LUO Jianhui , et al. A core-shell structured non-ionic nanoemulsion system and the preparation and use thereof: 201910001655.3. 2019-05-07. |
| [28] | DING Bin, GENG Xiangfei, LUO Jianhui , et al. A core-shell structured anionic nano microemulsion system, and preparation and application thereof: 201910001672.7. 2019-06-07. |
| [29] | DING Bin, XIONG Chunming, GENG Xiangfei , et al. A tight oil reservoir permeability increasing and oil displacement system, and preparation and application thereof: 201911139683.8. 2020-04-10. |
| [30] | XU K, BONNECAZE R, BALHOFF M . Egalitarianism among bubbles in porous media: An Ostwald ripening derived anticoarsening phenomenon. Physical Review Letters, 2017,119(26):264502. |
| [31] | TAGAVIFAR M, XU K, JANG S H , et al. Spontaneous and flow-driven interfacial phase change: Dynamics of microemulsion formation at the pore scale. Langmuir, 2017,33(45):13077-13086. |
| [32] | LEI Qun, LUO Jianhui, PENG Baoliang , et al. Mechanism of nano-sized oil-displacement agent expanding swept volume. Petroleum Exploration and Development, 2019,46(5):937-942. |
| [33] | LI Fuzhi, ZHANG Xiaojian, LYU Mujian . Study on liquid water cluster with 17O NMR . Acta Scientiae Circumstantiae, 2004,24(1):6-9. |
| [34] | DING Bin, LUO Jianhui, GENG Xiangfei , et al. Visual evaluation method for fluids in cores based on low field nuclear magnetic resonance technology. Oilfield Chemistry, 2018,35(1):170-175. |
| [35] | ZOU Caineng, DING Yunhong, LU Yongjun , et al. Concept, technology and practice of “man-made reservoirs” development. Petroleum Exploration and Development, 2017,44(1):144-154. |
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