Abstract
Low-permeability tight reservoirs are difficult to develop effectively. Conventional surfactants have high adsorption losses and poor matching with the tight reservoir pore roar radius. To further improve crude oil recovery, Microemulsion named ME-1 was developed with methyl T9 decanoate MS-9 as the oil phase, and the phase behavior was studied by quasi-ternary phase diagram to screen the main surfactant, co-surfactant, and salinity, with the composition of 20% AEO-9 + 13.3% propylene glycol methyl ether + 25% MS-9 + 41.7% distilled water + 1% KCl. The performance evaluation results showed that: The particle size of ME-1 system was 86.1 nm, and the oil-water interfacial tension was 0.08–0.13 mN/m, which could reverse the surface wettability of oil-wet mica flakes (116.38°) to water-wet (53.06°). NMR characterized its static and dynamic percolation recovery as 32.56% and 41.17%, respectively, and the 2.5-dimensional microscopic model showed that ME-1 could effectively increase the swept volume and oil washing efficiency. The experimental results show that the microemulsion can rely on the small size feature to effectively enter into the micro and nanopore pore throat, trigger the wetting inversion, promote the oil phase flow, and break up the crude oil into the small-scale state for recovery. In summary, this system can be used in tight reservoirs to enhance recovery, providing key technical support and theoretical support for effective mobilization and efficient development of low permeability tight fractured oil.
Copyright 2023, IFEDC Organizing Committee
This paper was prepared for presentation at the 2023 International Field Exploration and Development Conference in Wuhan, China, 20-22 September 2023.
This paper was selected for presentation by the IFEDC Committee following review of information contained in an abstract submitted by the author(s). Contents of the paper, as presented, have not been reviewed by the IFEDC Technical Team and are subject to correction by the author(s). The material does not necessarily reflect any position of the IFEDC Technical Committee its members. Papers presented at the Conference are subject to publication review by Professional Team of IFEDC Technical Committee. Electronic reproduction, distribution, or storage of any part of this paper for commercial purposes without the written consent of IFEDC Organizing Committee is prohibited. Permission to reproduce in print is restricted to an abstract of not more than 300 words; illustrations may not be copied. The abstract must contain conspicuous acknowledgment of IFEDC. Contact email: paper@ifedc.org.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Sun, L.D., Zou, C.N., Jia, A.L., et al.: Development characteristics and orientation of tight oil and gas in China. Pet. Explor. Dev. 06, 1–12 (2019)
Yao, J.L., Zeng, J.H., Luo, A.X., et al.: Controlling effect of source-reservoir structure in tight reservoir on oil-bearing propery. J. Earth Sci. Environ. 41(03), 267–280 (2019)
Zou, C.N., Yang, Z., Zhu, R.K., et al.: Progress in China unconventional oil & gas exploration and development and theoretical technologies. Acta Geol. Sin. 89(06), 979–1007 (2015)
Guan, B.S., Liu, Y.T., Liang, L., et al.: Shale oil reservoir reconstruction and efficient development technology. Oil Drilling Product. Technol. 41(02), 212–223 (2019)
Ding, B., **ong, C.M., Geng, X.F., et al.: Characteristics and EOR mechanisms of nanofluids permeation flooding for tight oil. Pet. Explor. Dev. 47(04), 756–764 (2020)
Qin, T., Javanbakht, G., Goual, L., et al.: Microemulsion-enhanced displacement of oil in porous media containing carbonate cements. Colloids Surf. A 530, 60–71 (2017)
Liu, Q., Guan, B.S., Liu, Y.T., et al.: Research and application progress of the microemulsion additives applied to oil & gas. Appli. Chem. Indus. 49(12), 3230–3236 (2020)
Liu, J.L., Luo, M.L., Jia, Z.L., et al.: Research progess of the microemulsion additives applied to reservoir stimulation. Appli. Chem. Indus. 40(08), 1440–1443 (2011)
Li, C., Wang, H., Liu, X.B., et al.: Application progress of nano emulsion and microemulsion in oil and gas production. Drilling Fluid Completion Fluid 31(02), 79–84+101–102 (2014)
Liu, Z.: Study on the law of oil-water seepage in low-permeability reservoirs based on nuclear magnetic resonance and laboratory phase permeability experiments. Yangtze University (2019)
Ding, B., Luo, J., Geng, X., et al.: Viaual evaluation method for fluids in cores based on low field nuclesr magnetic resonance technology. Oilfield Chem. 35(01), 170–175 (2018)
Pu, Y., Wang, X., Yang, S.: Research on spontaneous imbibition mechanism of tight oil reservoirs using NMRI method [J]. J. Petrochem. Univ. 30(01), 45–48+53 (2017)
Yang, Z., Liu, X., Li, H., et al.: Analysis on the influencing factors of imbibition and the effect evaluation of imbibition intight reservoirs. Pet. Explor. Dev. 46(04), 739–745 (2019)
Wang, J., Liu, Y., Chen, M., et al.: Expermental study on dynamic imbibition machanism of low permeability reservoirs. Pet. Explor. Dev. 36(01), 86–90 (2009)
Gu, X., Wang, C., Pu C., et al.: Experimental Study on dynamic imbibition characteristics of fractured tight sandstone reservoir during water flooding: an example from chang 8 reservoir of fuxian area in ordos basin. J. **'an Shiyou Univ. (Nat. Sci. Edn.) 33(03), 37–43 (2018)
Mejia, L., Tagavifar, M., Xu, K., et al.: Surfactant flooding in oil-wet micromodels with high permeability fractures. Fuel 241, 1117–1128 (2019)
Chen, H.H., Fan, H.F., Zhang, Y.: Effect of surfactants on chemical imbibition in Changqing ultra-low permeability sandstone reservoir. Sci. Technol. Eng. 19(10), 97–103 (2019)
Shen, A.Q., Liu, Y.K., Qiu, X.H., et al.: Improvement of spontaneous imbibition oil recovery in tight oil reservoir by surfactants. Oilfield Chem. 33(04), 696–699 (2016)
Chen, M.G., Yang, G., Wang, D.K., et al.: Formula study of gemini surfactant imbibition for sandstone reservoir. Oilfield Chem. 31(03), 400–404 (2014)
Carvalho, R.T.R., Oliveira, P.F., Palermo, L.C.M., et al.: Prospective acid microemulsions development for matrix acidizing petroleum reservoirs. Fuel 238, 75–85 (2019)
Pal, N., Kumar, S., Bera, A., et al.: Phase behaviour and characterization of microemulsion stabilized by a novel synthesized surfactant: Implications for enhanced oil recovery. Fuel 235, 995–1009 (2019)
Xu, D., Bai, B., Wu, H., et al.: Mechanisms of imbibition enhanced oil recovery in low permeability reservoirs: Effect of IFT reduction and wettability alteration. Fuel 244, 110–119 (2019)
Wang, X., Peng, X., Zhang, S., et al.: Characteristics of oil distributions in forced and spontaneous imbibition of tight oil reservoir. Fuel 224 (2018)
Zhang, X.W., Guo, H.K., Li, H.B.: Experimental study on imbibition oil displacement of tight oil reservoir using NMR technology. Bull. Sci. Technol. 34(08), 35–40 (2018)
Xu, M., Gupta, A., Dehghanpour, H.: How significant are strain and stress induced by water imbibition in dry gas shales? J. Petrol. Sci. Eng. 176, 428–443 (2019)
Yu, F., Jiang, H., Fan, Z., et al.: Features and imbibition mechanisms of Winsor I type surfactant solution in oil-wet porous media. Pet. Explor. Dev. 46(5), 1006–1013 (2019)
Yuan, S., Liang, T., Zhou, F., et al.: A microfluidic study of wettability alteration rate on enhanced oil recovery in oil-wet porous media. In: Abu Dhabi International Petroleum Exhibition & Conference, vol. 11. Society of Petroleum Engineers, Abu Dhabi, UAE (2019): 11
Raza, S.H., Treiber, L.E., Archer, D.L.: Wettability of reservoir rocks and its evaluation. Prod. Mon. (United States) 32, 4 (1968)
Liu, Z., Wang, W., Yang, H., et al.: Experimental study on spontaneous imbibition characteristics of coal based on fractal theory. Adv. Powder Technol. (2020)
Acknowledgements
The project is supported by Major Special Projects of PetroChina Co Ltd “Research on key technologies and equipment for reservoir modification” (2021DJ4506).
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2024 The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
About this paper
Cite this paper
Liu, Q. et al. (2024). Preparation and EOR Mechanism of Microemulsion. In: Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2023. IFEDC 2023. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-97-0264-0_52
Download citation
DOI: https://doi.org/10.1007/978-981-97-0264-0_52
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-97-0263-3
Online ISBN: 978-981-97-0264-0
eBook Packages: EngineeringEngineering (R0)