Development and evaluation of graphene nanosheets as a novel micro-nano plugging agent for oil-based muds

Abstract

Although there are abundant shale gas resources in China, shale gas is generally buried much deeper than foreign countries. For large-scale development, there are still many core technologies that have not yet been solved. In this paper, we have analyzed microstructure of formation rock and its mineral composition, and the mechanism of wellbore instability is revealed by studying the petrophysical properties and characteristics of the wellbore instability strata in the Changning-Weiyuan area. The laboratory innovatively constructs the “solid phase intercalation-liquid phase expansion stripping method” and obtains high-quality graphene nanosheets. The results of the performance test and the HTHP filtration test on the graphene nanosheets show that it achieves the lowest HTHP filtration loss (8.0 mL) among tested additives, outperforming super-fine CaCO₃ (8.6 mL) and conventional agents (9.2 mL), while minimally affecting rheology. Other performance tests indicate that high-quality graphene nanosheets made by our laboratory can be well dispersed in solvent with almost no obvious aggregation and it has the median particle size ranges from 212 nm to 228 nm, which means it has perfect ability to plug micro-crack in the Changning-Weiyuan area. The oilfield application shows that adding 0.75% graphene nanosheets to the field mud significantly enhanced wellbore stability, achieving zero mud loss and a 94.6% drilling rate in the target zone, while reducing HTHP filtration to below 2.4 mL.

Keywords

Shale formation / HTHP filtration test / Drilling fluid / Wellbore stability / Graphene nanosheets

CRediT authorship contribution statement

Fan Yu: Writing – review & editing, Writing – original draft, Methodology, Investigation, Formal analysis. Huang Weian: Supervision. Guo Jianhua: Investigation. Tang Yijia: Investigation.

Declaration of competing interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Acknowledgements

This work was supported by the National Natural Science Foundation of China (No.52274008, 52204012). National key R & D projects (No. 2019YFA0708303). Science and Technology Cooperation Project of the CNPC-SWPU Innovation Alliance (No. 2020CX040102, 2020CX040201). Natural Science Foundation of Sichuan Province (No.2022NSFSC0983). National Natural Science Foundation of China Joint Fund Project (No.U23A2026).

References

[1] J. Xie, Practices and achievements of the Changning-Weiyuan shale gas national demonstration project construction, Nat. Gas. Ind. 38 (2) (2018) 1-7, https://doi.org/10.3787/j.issn.1000-0976.2018.02.001.

[2] J. Xie, Rapid shale gas development accelerated by the progress in key technologies: a case study of the Changning-Weiyuan National Shale Gas Demonstration Zone, Nat. Gas. Ind. B 5 (4) (2018) 283-292, https://doi.org/10.1016/j.ngib.2017.12.007.

[3] M.E. Zeynali, Mechanical and physico-chemical aspects of wellbore stability during drilling operations, J. Petrol. Sci. Eng. 82 (2012) 120-124, https://doi.org/10.1016/j.petrol.2012.01.006.

[4] T. Ma, P. Chen, A wellbore stability analysis model with chemical-mechanical coupling for shale gas reservoirs, J. Nat. Gas Sci. Eng. 26 (2015) 72-88, https://doi.org/10.1016/j.jngse.2015.06.002.

[5] L.I. Maosen , L.I.U. Zheng , H.U. Jia , Application of high density oil-based drilling fluids in shale gas horizontal well of Changning-Weiyuan, Nat. Gas. Explor. Dev 40 (1) (2017) 88-92.

[6] R. Caenn, H.C.H. Darley , G.R. Gray , Composition and Properties of Drilling and Completion Fluids, sixth ed., Gulf Professional Publishing, 2011.

[7] J.K. Fink , Oil Field Chemicals, Gulf Professional Publishing, 2015.

[8] C. Wenke, L. Wei, The wellbore stability study in bedding shale formation on the condition of plasticity, Chem. Technol. Fuels Oils 58 (1) (2022) 220-231, https://doi.org/10.1007/s10553-022-01370-y.

[9] C. Gao, S. Miska, M. Yu, V. Dokhani, E. Ozbayoglu, N. Takach, Experimental and numerical analysis of effective enhancement of wellbore stability in shales with nanoparticles, J. Nat. Gas Sci. Eng. 95 (2021) 104197, https://doi.org/10.1016/j.jngse.2021.104197.

[10] H. Liu, S. Cui, Y. Meng, Z. Li, X. Yu, H. Sun, …, Y. Luo, Rock mechanics and wellbore stability of deep shale during drilling and completion processes, J. Petrol. Sci. Eng. 205 (2021) 108882, https://doi.org/10.1016/j.petrol.2021.108882.

[11] X. He, J. Wu, R. Yong, S. Zhao, X. Zhou, D. Zhang, …, C. Zhong, Accumulation conditions and key exploration and development technologies of marine shale gas field in Changning-Weiyuan block, Sichuan basin, Acta Pet. Sin. 42 (2) (2021) 259, https://doi.org/10.7623/syxb202102010.

[12] T.A.N.G. Wenquan , G.A.O. Shuyang , W.A.N.G. Chengbiao , Z.H.E.N. Jianwu , C.H.E.N. Xiaofei , C.H.A.I. Long , Research on mechanisms of wellbore instability of Longmaxi shale formation and high performance water base drilling fluid technology, Drill. Fluid Complet. Fluid 34 (3) (2017) 21-26, https://doi.org/10.3969/j.issn.1001-5620.2017.03.004.

[13] R. Gholami, A. Raza, M. Rabiei, N. Fakhari, P. Balasubramaniam, V. Rasouli, R. Nagarajan, An approach to improve wellbore stability in active shale formations using nanomaterials, Petroleum 7 (1) (2021) 24-32, https://doi.org/10.1016/j.petlm.2020.01.001.

[14] M. Amanullah, A.M. Al-Tahini, Nano-technology-its significance in smart fluid development for oil and gas field application, in: SPE Saudi Arabia Section Technical Symposium, 2009, https://doi.org/10.2118/126102-MS.

[15] Z. Vryzas, V.C. Kelessidis, Nano-based drilling fluids: a review, Energies 10 (4) (2017) 540, https://doi.org/10.3390/en10040540.

[16] L. Schiavo, A. Cammarano, G. Carotenuto, A. Longo, M. Palomba, L. Nicolais, An overview of the advanced nanomaterials science, Inorg. Chim. Acta. 559 (2024) 121802, https://doi.org/10.1016/j.ica.2023.121802.

[17] Q. Yun, Y. Ge, Z. Shi, J. Liu, X. Wang, A. Zhang, H. Zhang, Recent progress on phase engineering of nanomaterials, Chem. Rev. 123 (23) (2023) 13489-13692, https://doi.org/10.1021/acs.chemrev.3c00459.

[18] K.P. Hoelscher , G. De Stefano , M. Riley , S. Young , Application of nanotechnology in drilling fluids, in: SPE International Oilfield Nanotechnology Conference and Exhibition. SPE-157031-MS, 2012, https://doi.org/10.2118/157031-MS.

[19] Y. Bai, D. Li, N. Su, G. Xie, L. Wu, D. Gu, P. Luo, Study on the preparation and mechanism of two-dimensional nanomaterials as plugging agents for oil-based drilling fluids, Colloids Surf. A Physicochem. Eng. Asp. 702 (2024) 134676, https://doi.org/10.1016/j.colsurfa.2024.134676.

[20] H. Zhang, C. Lu, Y. Yang, X. Ma, Graphene slurry plugging agent for water-based drilling fluid, SPE J. (2025) 1-12, https://doi.org/10.2118/228284-PA.

[21] A. Yuxiu, J. Guancheng, Q. Yourong, H. Xianbin, S. He, High-performance shale plugging agent based on chemically modified graphene, J. Nat. Gas Sci. Eng. 32 (2016) 347-355, https://doi.org/10.1016/j.jngse.2016.04.048.

[22] C.Y. Ho , S. Yusup , C.V. Soon , M.T. Arpin , Rheological behaviour of graphene nano-sheets in hydrogenated oil-based drilling fluid, Procedia Eng. 148 (2016) 49-56, https://doi.org/10.1016/j.proeng.2016.06.490.

[23] S. Cui, H. Liu, Y. Meng, Y. Fan, J. Wang, Z. Han, Study on mechanical properties and wellbore stability of deep brittle shale, J. Petrol. Sci. Eng. 194 (2020) 107500, https://doi.org/10.1016/j.petrol.2020.107500.

[24] H. Li, L. Liu, G. Li, Z. Jiang, C. Luo, Geomechanical method for wellbore stability prediction: a case study of the Longmaxi formation in the Yongchuan shale gas field, Southwestern China, AIP Adv. 15 (3) (2025), https://doi.org/10.1063/5.0259440.

[25] X. Yan, Y. Kang, L. You, Wellbore instability induced by the coupling of high-pH fluid-shale reaction and fracture surface sliding in shale gas wells: experimental and field studies, Energy Fuels 34 (5) (2020) 5578-5588, https://doi.org/10.1021/acs.energyfuels.0c00079.

[26] K. Wu, Z. Chen, X. Li, C. Guo, M. Wei, A model for multiple transport mechanisms through nanopores of shale gas reservoirs with real gas effect-adsorption-mechanic coupling, Int. J. Heat Mass Tran. 93 (2016) 408-426, https://doi.org/10.1016/j.ijheatmasstransfer.2015.10.003.

[27] Y. Wang, X.W. Li, D.H. Sun, Analysis on the status and potential of shale gas exploitation in Changning-Weiyuan area, Sichuan Basin, Shandong Chem. Ind 49 (14) (2020) 134-135, https://doi.org/10.19319/j.cnki.issn.1008-021x.2020.14.050.

[28] X.J. Wang , D.Q. Bai , Y.C. Sun , et al. , Enhanced plugging of shale gas Wells with full oil-based drilling fluid system: taking weiyuan block of Changning-Weiyuan national shale gas demonstration area as an example, Nat. Gas. Ind. 40 (6) (2020) 107-114, https://doi.org/10.3787/j.issn.1000-0976.2020.06.011.

[29] S. Cui, H. Liu, Y. Meng, Y. Fan, J. Wang, Z. Han, Study on mechanical properties and wellbore stability of deep brittle shale, J. Petrol. Sci. Eng. 194 (2020) 107500, https://doi.org/10.1016/j.petrol.2020.107500.

[30] Z. He, S. Fan, J. Fang, Y. Yu, J. Zhang, S. Li, P. Xu, Research and application of fast plugging method for fault Zone Formation in Tarim Basin, China, Energies 16 (11) (2023) 4330, https://doi.org/10.3390/en16114330.

[31] A.H. Mohamed , A. Sulaimon , S. Jufar , V. Manickam , B. Adeyemi , Wellbore strengthening: palm date seeds for mitigating circulation losses and effect of salinity on clay swelling, in: SPE Nigeria Annual International Conference and Exhibition, 2023, July, https://doi.org/10.2118/217237-MS (p. D031S017R005). SPE.

[32] X. Fan, L. He, Q. Zhang, P. Zhao, M. Zhang, B. Yao, K. Li, Effect of hydration on pore structure and physical properties of Permian basalt and tuff in Sichuan Basin during pressurized imbibition, J. Petrol. Sci. Eng. 213 (2022) 110322, https://doi.org/10.1016/j.petrol.2022.110322.

[33] H. Zhang, S.F. Zhang, J. Yao, et al., Study on the mechanism of graphene oxide plugging mud shale in longmaxi formation, Fine Chem. 37 (5) (2020) 1038-1044, https://doi.org/10.13550/j.jxhg.20191027.