Advanced developments in shale inhibitors for oil production with low environmental footprints – A review

Ross, 2009, The importance of shale composition and pore structure upon gas storage potential of shale gas reservoirs, Mar Pet Geol, 26, 916, 10.1016/j.marpetgeo.2008.06.004 Murray HH. Chapter 2 Structure and Composition of the Clay Minerals and their Physical and Chemical Properties; 2006. p. 7–31. doi: 10.1016/S1572-4352(06)02002-2. Anderson, 2010, Clay swelling — A challenge in the oilfield, Earth-Sci Rev, 98, 201, 10.1016/j.earscirev.2009.11.003 Berthonneau, 2017, Crystal-chemistry control of the mechanical properties of 2: 1 clay minerals, Appl Clay Sci, 143, 387, 10.1016/j.clay.2017.04.010 Bergaya F, Lagaly G. Chapter 1 General Introduction: Clays, Clay Minerals, and Clay Science, 2006, p. 1–18. doi: 10.1016/S1572-4352(05)01001-9. Heidug, 1996, Hydration swelling of water-absorbing rocksA constitutive model, Int J Numer Anal Methods Geomech, 20, 403, 10.1002/(SICI)1096-9853(199606)20:6<403::AID-NAG832>3.0.CO;2-7 Schuttlefield, 2007, An investigation of water uptake on clays minerals using ATR-FTIR spectroscopy coupled with quartz crystal microbalance measurements, J Geophys Res, 112, D21303, 10.1029/2007JD008973 Yong, 1999, Soil suction and soil-water potentials in swelling clays in engineered clay barriers, Eng Geol, 54, 3, 10.1016/S0013-7952(99)00056-3 El-Swaify, 197539, Changes in the physical properties of soil clays due to precipitated aluminum and iron hydroxides: I. Swelling and aggregate stability after drying1, Soil Sci Soc Am J, 1056 Hansen, 2012, Swelling transition of a clay induced by heating, Sci Rep, 2, 618, 10.1038/srep00618 Murray, 2000, Traditional and new applications for kaolin, smectite, and palygorskite: a general overview, Appl Clay Sci, 17, 207, 10.1016/S0169-1317(00)00016-8 Caenn, 1996, Drilling fluids: state of the art, J Pet Sci Eng, 14, 221, 10.1016/0920-4105(95)00051-8 Aston MS, Alberty MW, McLean MR, de Jong HJ, Armagost K. Drilling Fluids for Wellbore Strengthening. In: IADC/SPE Drill. Conf., Society of Petroleum Engineers; 2004. doi: 10.2118/87130-MS. Aftab, 2017, Nanoparticles based drilling muds a solution to drill elevated temperature wells: a review, Renew Sustain Energy Rev, 76, 1301, 10.1016/j.rser.2017.03.050 Khodja, 2010, Shale problems and water-based drilling fluid optimisation in the Hassi Messaoud Algerian oil field, Appl Clay Sci, 49, 383, 10.1016/j.clay.2010.06.008 Abass H, Shebatalhamd A, Khan M, Al-Shobaili Y, Ansari A, Ali S, et al. Wellbore Instability of Shale Formation; Zuluf Field, Saudi Arabia. In: SPE Tech. Symp. Saudi Arab. Sect., Society of Petroleum Engineers; 2006. doi: 10.2118/106345-MS. Tan CP, Richards BG, Rahman SS. Managing Physico-Chemical Wellbore Instability in Shales with the Chemical Potential Mechanism. In: SPE Asia Pacific Oil Gas Conf., Society of Petroleum Engineers; 1996. doi: 10.2118/36971-MS. Yu, 2003, Chemical–mechanical wellbore instability model for shales: accounting for solute diffusion, J Pet Sci Eng, 38, 131, 10.1016/S0920-4105(03)00027-5 Fadairo, 2012, Novel formulation of environmentally friendly oil based drilling mud Davies, 1984, Environmental effects of the use of oil-based drilling muds in the North Sea, Mar Pollut Bull, 15, 363, 10.1016/0025-326X(84)90169-3 Siddique, 2017, Oil based drilling fluid waste: an overview on environmentally persistent pollutants, IOP Conf Ser Mater Sci Eng, 195, 10.1088/1757-899X/195/1/012008 Bland R, Smith GL, Eagark P, van Oort E, Dharma N. Low Salinity Polyglycol Water-Based Drilling Fluids as Alternatives to Oil-Based Muds. In: SPE/IADC Asia Pacific Drill. Technol., Society of Petroleum Engineers; 1996. doi: 10.2118/36400-MS. Bains, 2001, Molecular modelling of the mechanism of action of organic clay-swelling inhibitors, Mol Simul, 26, 101, 10.1080/08927020108023012 Joel, 2012, C.U N. Effect of KCL on rheological properties of shale contaminated water-based MUD (WBM), Glob J Res Eng Chem Eng, 12 Liu, 2004, Swelling inhibition by polyglycols in montmorillonite dispersions, J Dispers Sci Technol, 25, 63, 10.1081/DIS-120027669 Guo, 2006, Applications of strongly inhibitive silicate-based drilling fluids in troublesome shale formations in Sudan, J Pet Sci Eng, 50, 195, 10.1016/j.petrol.2005.12.006 Taraghikhah S, Mohammadi MK, Nowtaraki KT. Now It is the Time to Forget Potassium Based Shale Inhibitors by Developing Nano Silica-Alumina Based Drilling Fluid; Laboratory Study Proves Improvement in Shale Inhibition and Temperature Stability. In: SPE/IATMI Asia Pacific Oil Gas Conf. Exhib., Society of Petroleum Engineers; 2017. doi: 10.2118/186424-MS. van Oort, 2003, On the physical and chemical stability of shales, J Pet Sci Eng, 38, 213, 10.1016/S0920-4105(03)00034-2 Ferreira, 2016, Partially hydrophobized hyperbranched polyglycerols as non-ionic reactive shale inhibitors for water-based drilling fluids, Appl Clay Sci, 132–133, 122, 10.1016/j.clay.2016.05.025 Neuberger, 2018, Graphene: a review of applications in the petroleum industry, J Pet Sci Eng, 167, 152, 10.1016/j.petrol.2018.04.016 Li, 2018, Study of gelatin as biodegradable shale hydration inhibitor, Colloids Surf A Physicochem Eng Asp, 539, 192, 10.1016/j.colsurfa.2017.12.020 Reid PI, Dolan B, Cliffe S. Mechanism of Shale Inhibition by Polyols in Water Based Drilling Fluids. In: SPE Int. Symp. Oilf. Chem., Society of Petroleum Engineers; 1995. doi: 10.2118/28960-MS. Wong, 1997, Three-dimensional anisotropic swelling model for clay shale —A fabric approach, Int J Rock Mech Min Sci, 34, 187, 10.1016/S0148-9062(96)00057-5 Tan CP, Richards BG, Rahman SS, Andika R. Effects of Swelling and Hydrational Stress in Shales on Wellbore Stability. In: SPE Asia Pacific Oil Gas Conf. Exhib., Society of Petroleum Engineers; 1997. doi: 10.2118/38057-MS. Gholami, 2018, A review on borehole instability in active shale formations: interactions, mechanisms and inhibitors, Earth-Science Rev, 177, 2, 10.1016/j.earscirev.2017.11.002 Barbour, 1989, Mechanisms of osmotic flow and volume change in clay soils, Can Geotech J, 26, 551, 10.1139/t89-068 Du, 2018, Shale softening: observations, phenomenological behavior, and mechanisms, Appl Clay Sci, 161, 290, 10.1016/j.clay.2018.04.033 Wang, 2017, Swelling of shales: a multiscale experimental investigation, Energy Fuels, 31, 10442, 10.1021/acs.energyfuels.7b01223 Gazaniol, 1995, Wellbore failure mechanisms in shales: prediction and prevention, J Pet Technol, 47, 589, 10.2118/28851-PA Lyu, 2015, A review of shale swelling by water adsorption, J Nat Gas Sci Eng, 27, 1421, 10.1016/j.jngse.2015.10.004 Butscher, 2016, Swelling of clay-sulfate rocks: a review of processes and controls, Rock Mech Rock Eng, 49, 1533, 10.1007/s00603-015-0827-6 Patel A, Stamatakis S, Young S, Friedheim J. Advances in Inhibitive Water-Based Drilling Fluids—Can They Replace Oil-Based Muds? In: Int. Symp. Oilf. Chem., Society of Petroleum Engineers; 2007. doi: 10.2118/106476-MS. Saki Y, Dinarvand N, Habibnia B, Shahbazi K. Experimental Investigation of Possibility of Replacing Oil-Based Muds With Environmentally Friendly Water-Based Glycol Muds in Maroon Oil Field. In: Trinidad Tobago Energy Resour. Conf., Society of Petroleum Engineers; 2010. doi: 10.2118/132769-MS. Malachosky, 1993, Offshore disposal of oil-based drilling-fluid waste: an environmentally acceptable solution, SPE Drill Complet, 8, 283, 10.2118/23373-PA Almudhhi, 2016, Environmental impact of disposal of oil-based mud waste in Kuwait, Pet Sci Technol, 34, 91, 10.1080/10916466.2015.1122630 Xie, 2014, Harmless treatment technology of waste oil-based drilling fluids, Pet Sci Technol, 32, 1043, 10.1080/10916466.2011.638691 Zhong, 2013, An inhibition properties comparison of potassium chloride and polyoxypropylene diamine in water-based drilling fluid, Pet Sci Technol, 31, 2127, 10.1080/10916466.2011.561265 Ma, 2017, Preparation and evaluation of polyampholyte inhibitor DAM, RSC Adv, 7, 49320, 10.1039/C7RA08385H Suter, 2011, Rule based design of clay-swelling inhibitors, Energy Environ Sci, 4, 4572, 10.1039/c1ee01280k Aftab, 2017, Enhancing the rheological properties and shale inhibition behavior of water-based mud using nanosilica, multi-walled carbon nanotube, and graphene nanoplatelet, Egypt J Pet, 26, 291, 10.1016/j.ejpe.2016.05.004 Clark, 1976, Polyacrylamide/potassium-chloride mud for drilling water-sensitive shales, J Pet Technol, 28, 719, 10.2118/5514-PA Jain, 2015, Evaluation of polyacrylamide/clay composite as a potential drilling fluid additive in inhibitive water based drilling fluid system, J Pet Sci Eng, 133, 612, 10.1016/j.petrol.2015.07.009 Guerrero M, Guerrero X. Use of Amine/PHPA System To Drill High Reactive Shales in the Orito Field in Colombia. In: Int. Oil Conf. Exhib. Mex., Society of Petroleum Engineers; 2006. doi: 10.2118/104010-MS. de Souza, 2010, Hydrophobically modified poly(ethylene glycol) as reactive clays inhibitor additive in water-based drilling fluids, J Appl Polym Sci, 117, 857, 10.1002/app.31318 Gou, 2015, Biodegradable polyethylene glycol-based ionic liquids for effective inhibition of shale hydration, RSC Adv, 5, 32064, 10.1039/C5RA02236C Jain, 2015, Evaluation of polyacrylamide-grafted-polyethylene glycol/silica nanocomposite as potential additive in water based drilling mud for reactive shale formation, J Nat Gas Sci Eng, 26, 526, 10.1016/j.jngse.2015.06.051 Liu, 2016, Evaluation of β-cyclodextrin–polyethylene glycol as green scale inhibitors for produced-water in shale gas well, Desalination, 377, 28, 10.1016/j.desal.2015.09.007 An, 2015, An environmental friendly and biodegradable shale inhibitor based on chitosan quaternary ammonium salt, J Pet Sci Eng, 135, 253, 10.1016/j.petrol.2015.09.005 Patel AD. Design and Development of Quaternary Amine Compounds: Shale Inhibition with Improved Environmental Profile. In: SPE Int. Symp. Oilf. Chem., Society of Petroleum Engineers; 2009. doi: 10.2118/121737-MS. Zhong, 2016, Minimization shale hydration with the combination of hydroxyl-terminated PAMAM dendrimers and KCl, J Mater Sci, 51, 8484, 10.1007/s10853-016-0108-0 Berry SL, Boles JL, Brannon HD, Beall BB. Performance Evaluation of Ionic Liquids as a Clay Stabilizer and Shale Inhibitor. In: SPE Int. Symp. Exhib. Form. Damage Control, Society of Petroleum Engineers; 2008. doi: 10.2118/112540-MS. El-Monier EA, Nasr-El-Din HA. A New Al-Based Stabilizer for High pH Applications. In: Bras. Offshore, Society of Petroleum Engineers; 2011. doi: 10.2118/143260-MS. Bailey, 1994, Effect of clay/polymer interactions on shale stabilization during drilling, Langmuir, 10, 1544, 10.1021/la00017a037 Amanullah M, Al-Tahini AM. Nano-Technology - Its Significance in Smart Fluid Development for Oil and Gas Field Application. In: PE Saudi Arab. Sect. Tech. Symp., Society of Petroleum Engineers; 2009. doi: 10.2118/126102-MS. Zhang, 2001, A review of starches and their derivatives for oilfield applications in China, Starch/Staerke, 53, 401, 10.1002/1521-379X(200109)53:9<401::AID-STAR401>3.0.CO;2-2 Addy, 1984, Ecological effects of low toxicity oil-based mud drilling in the Beatrice oilfield, Mar Pollut Bull, 15, 429, 10.1016/0025-326X(84)90141-3 Cranford, 1999, Chronic toxicity and physical disturbance effects of water- and oil-based drilling fluids and some major constituents on adult sea scallops (Placopecten magellanicus), Mar Environ Res, 48, 225, 10.1016/S0141-1136(99)00043-4 Holdway, 2002, The acute and chronic effects of wastes associated with offshore oil and gas production on temperate and tropical marine ecological processes, Mar Pollut Bull, 44, 185, 10.1016/S0025-326X(01)00197-7 Cranford, 1991, Chronic sublethal impact of mineral oil-based drilling mud cuttings on adult sea scallops, Mar Pollut Bull, 22, 339, 10.1016/0025-326X(91)90069-5 Ferrante, 1981, Fate and effects of whole drilling fluids and fluid components in terrestrial and freshwater ecosystems, A Literature Rev Kisic, 2009, The effect of drilling fluids and crude oil on some chemical characteristics of soil and crops, Geoderma, 149, 209, 10.1016/j.geoderma.2008.11.041 Eide, 1990, A review of exposure conditions and possible health effects associated with aerosol and vapour from low-aromatic oil-based drilling fluids, Ann Occup Hyg, 34, 149 Steinsvåg K, Bråtveit M, Moen BE. Exposure to Oil Mist and Oil Vapour During Offshore Drilling in Norway, 1979–2004. 2005. doi: 10.1093/annhyg/mei049. James, 2000, Improving the working environment and drilling economics through better understanding of oil-based drilling fluid chemistry, SPE Drill Complet, 15, 254, 10.2118/67835-PA Veil JA. Drilling Waste Management: Past, Present, and Future. In: SPE Annu. Tech. Conf. Exhib., Society of Petroleum Engineers; 2002. doi: 10.2118/77388-MS. Sharma MM, Zhang R, Chenevert ME, Ji L, Guo Q, Friedheim J. A New Family of Nanoparticle Based Drilling Fluids. In: SPE Annu. Tech. Conf. Exhib., Society of Petroleum Engineers; 2012. doi: 10.2118/160045-MS. Reid PI, Elliott GP, Minton RC, Chambers BD, Burt DA. Reduced Environmental Impact and Improved Drilling Performance With Water-Based Muds Containing Glycols. In: SPE/EPA Explor. Prod. Environ. Conf., Society of Petroleum Engineers; 1993. doi: 10.2118/25989-MS. Razali, 2018, Review of biodegradable synthetic-based drilling fluid: progression, performance and future prospect, Renew Sustain Energy Rev, 90, 171, 10.1016/j.rser.2018.03.014 Hall LJ, Deville JP, Santos CM, Rojas OJ, Araujo CS. Nanocellulose and Biopolymer Blends for High-Performance Water-Based Drilling Fluids. In: IADC/SPE Drill. Conf. Exhib., Society of Petroleum Engineers; 2018. doi: 10.2118/189577-MS. Li W, Liu J, Zhao X, Zhang J, Jiang J, He T, et al. Novel Modified Rectorite Provides Reliable Rheology and Suspendability for Biodiesel Based Drilling Fluid. In: SPE/IADC Middle East Drill. Technol. Conf. Exhib., Society of Petroleum Engineers; 2018. doi: 10.2118/189310-MS. Zhong, 2012, Poly (oxypropylene)-amidoamine modified bentonite as potential shale inhibitor in water-based drilling fluids, Appl Clay Sci, 67–68, 36, 10.1016/j.clay.2012.06.002 Zhong, 2013, Bis(hexamethylene)triamine as potential shale inhibitor in water-based drilling fluid, Open Pet Eng J, 6, 49, 10.2174/1874834101306010049 Beg, 2018, Effect of cationic copolyelectrolyte additives on drilling fluids for shales, J Pet Sci Eng, 161, 506, 10.1016/j.petrol.2017.12.009 Guancheng, 2016, Polyethyleneimine as shale inhibitor in drilling fluid, Appl Clay Sci, 127–128, 70, 10.1016/j.clay.2016.04.013 An, 2018, A strong inhibition of polyethyleneimine as shale inhibitor in drilling fluid, J Pet Sci Eng, 161, 1, 10.1016/j.petrol.2017.11.029 Chen, 2017, Preparation and performance of amine-tartaric salt as potential clay swelling inhibitor, Appl Clay Sci, 138, 12, 10.1016/j.clay.2016.12.039 Zhang, 2018, Preparation and application of melamine cross-linked poly ammonium as shale inhibitor, Chem Cent J, 12, 44, 10.1186/s13065-018-0410-9 Zhong, 2016, Inhibiting shale hydration and dispersion with amine-terminated polyamidoamine dendrimers, J Nat Gas Sci Eng, 28, 52, 10.1016/j.jngse.2015.11.029 Zhong, 2015, Synergistic stabilization of shale by a mixture of polyamidoamine dendrimers modified bentonite with various generations in water-based drilling fluid, Appl Clay Sci, 114, 359, 10.1016/j.clay.2015.06.018 Zhong, 2014, The development and application of a novel polyamine water-based drilling fluid, Pet Sci Technol, 32, 497, 10.1080/10916466.2011.592897 Peng, 2013, Structure-property relationship of polyetheramines as clay-swelling inhibitors in water-based drilling fluids, J Appl Polym Sci, 129, 1074, 10.1002/app.38784 Zhong, 2013, Inhibition comparison between polyether diamine and quaternary ammonium salt as shale inhibitor in water-based drilling fluid, Energy Sources Part A Recover Util Environ Eff, 35, 218, 10.1080/15567036.2011.606871 Zhong, 2015, Inhibitive properties comparison of different polyetheramines in water-based drilling fluid, J Nat Gas Sci Eng, 26, 99, 10.1016/j.jngse.2015.05.029 Yuxiu, 2016, High-performance shale plugging agent based on chemically modified graphene, J Nat Gas Sci Eng, 32, 347, 10.1016/j.jngse.2016.04.048 Aftab, 2016, Novel zinc oxide nanoparticles deposited acrylamide composite used for enhancing the performance of water-based drilling fluids at elevated temperature conditions, J Pet Sci Eng, 146, 1142, 10.1016/j.petrol.2016.08.014 Dardir, 2014, Preparation and evaluation of some esteramides as synthetic based drilling fluids, Egypt J Pet, 23, 35, 10.1016/j.ejpe.2014.02.006 Ahmad, 2018, High molecular weight copolymers as rheology modifier and fluid loss additive for water-based drilling fluids, J Mol Liq, 252, 133, 10.1016/j.molliq.2017.12.135 Jain, 2017, Formulation of a water based drilling fluid system with synthesized graft copolymer for troublesome shale formations, J Nat Gas Sci Eng, 38, 171, 10.1016/j.jngse.2016.12.018 Xu, 2017, Preparation and performance properties of polymer latex SDNL in water-based drilling fluids for drilling troublesome shale formations, J Nat Gas Sci Eng, 37, 462, 10.1016/j.jngse.2016.11.064 Zhang, 2011, Preparation and evaluation of sodium hydroxymethyl lignosulfonate as eco-friendly drilling fluid additive, Adv Mater Res, 415–417, 629 Zhang, 2014, Preparation of nitration-oxidation lignosulfonate as an eco-friendly drilling fluid additive, Pet Sci Technol, 32, 1661, 10.1080/10916466.2011.652334 Sa, 2013, Hydrophobic amino acids as a new class of kinetic inhibitors for gas hydrate formation, Sci Rep, 3, 2428, 10.1038/srep02428 Xuan, 2015, Biodegradable oligo (poly-l-lysine) as a high-performance hydration inhibitor for shale, RSC Adv, 5, 84947, 10.1039/C5RA16003K Xuan, 2013, Inhibiting effect of dopamine adsorption and polymerization on hydrated swelling of montmorillonite, Colloids Surfaces A Physicochem Eng Asp, 422, 50, 10.1016/j.colsurfa.2013.01.038 Jain, 2014, Study of the effect of xanthan gum based graft copolymer on water based drilling fluid, J Macromol Sci Part A, 51, 976, 10.1080/10601325.2014.967089 William, 2014, Effect of CuO and ZnO nanofluids in xanthan gum on thermal, electrical and high pressure rheology of water-based drilling fluids, J Pet Sci Eng, 117, 15, 10.1016/j.petrol.2014.03.005 Li, 2014, Drilling fluid from natural vegetable gum, Pet Sci Technol, 32, 738, 10.1080/10916466.2011.605092 Lopes, 2014, Cationic and hydrophobically modified chitosans as additives for water-based drilling fluids, . J Appl Polym Sci, 131, 10.1002/app.40300 Ni, 2016, Preparation and application of a glucose graft copolyammonium as shale inhibitor, Russ J Appl Chem, 89, 1354, 10.1134/S107042721608022X Zoveidavianpoor, 2016, The use of nano-sized Tapioca starch as a natural water-soluble polymer for filtration control in water-based drilling muds, J Nat Gas Sci Eng, 34, 832, 10.1016/j.jngse.2016.07.048 Song, 2016, Performance of low solid bentonite drilling fluids modified by cellulose nanoparticles, J Nat Gas Sci Eng, 34, 1403, 10.1016/j.jngse.2016.08.036 Moslemizadeh, 2015, Experimental investigation of the effect of henna extract on the swelling of sodium bentonite in aqueous solution, Appl Clay Sci, 105–106, 78, 10.1016/j.clay.2014.12.025 Moslemizadeh, 2017, A natural dye in water-based drilling fluids: swelling inhibitive characteristic and side effects, Petroleum, 3, 355, 10.1016/j.petlm.2016.08.007 Shadizadeh, 2015, A novel nonionic surfactant for inhibiting shale hydration, Appl Clay Sci, 118, 74, 10.1016/j.clay.2015.09.006 Hafshejani, 2016, A novel bio-based deflocculant for bentonite drilling mud, Appl Clay Sci, 127–128, 23, 10.1016/j.clay.2016.03.037 Moslemizadeh, 2017, A triterpenoid saponin as an environmental friendly and biodegradable clay swelling inhibitor, J Mol Liq, 247, 269, 10.1016/j.molliq.2017.10.003 Moslemizadeh, 2018, A biosurfactant for inhibiting clay hydration in aqueous solutions: applications to petroleum industry, Can J Chem Eng Samaei SM, Tahmasbi K. The Possibility of Replacing Oil-Based Mud With the Environmentally Acceptable Water-Based Glycol Drilling Mud for the Iranian Fields. E&P Environ. In: Saf. Conf., Society of Petroleum Engineers; 2007. doi: 10.2118/106419-MS. Jiang, 2011, polyethylene glycol drilling fluid for drilling in marine gas hydrates-bearing sediments: an experimental study, Energies, 4, 140, 10.3390/en4010140 Nikolaev, 2014, The experimental study on a new type low temperature water- based composite alcohol drilling fluid, Procedia Eng, 73, 276, 10.1016/j.proeng.2014.06.199 Teixeira, 2014, Nascimento RSV. Hyperbranched polyglycerols, obtained from environmentally benign monomer, as reactive clays inhibitors for water-based drilling fluids, J Appl Polym Sci, 131, n/a-n/a, 10.1002/app.40384 McDonald MJ. A Novel Potassium Silicate for Use in Drilling Fluids Targeting Unconventional Hydrocarbons. In: SPE Can. Unconv. Resour. Conf., Society of Petroleum Engineers; 2012. Fritz B, Jarrett M. Potassium Silicate Treated Water-based Fluid: An Effective Barrier to Instability in the Fayetteville Shale. In: IADC/SPE Drill. Conf. Exhib., Society of Petroleum Engineers; 2012. Ismail, 2016, The novel approach for the enhancement of rheological properties of water-based drilling fluids by using multi-walled carbon nanotube, nanosilica and glass beads, J Pet Sci Eng, 139, 264, 10.1016/j.petrol.2016.01.036 Yang, 2017, Environmental-friendly salt water mud with nano-SiO2 in horizontal drilling for shale gas, J Pet Sci Eng, 156, 408, 10.1016/j.petrol.2017.06.022