Development of drilling fluids based on polysaccharides and natural minerals
The technology of oil well drilling in complex geological conditions by applying the drilling muds based on the polysaccharides – gellan, xanthan and their mixture which potentially possess a good flocculation properties and the ability to reversible sol-gel transition in dependence of temperature and concentration of low molecular weight cations in water has been justified in this work.
For the preparation of drilling muds, gellan and xanthan were used, these polymers were obtained from biomass by an aerobic fermentation using microorganisms Sphingomonas elodea and Xanthomonas campestris. Bentonite was used as a natural mineral.
Physical and chemical characteristics of aqueous and aqueous-salt solutions of natural polysaccharide gellan including: density, intrinsic and effective viscosity, static shear stress, dynamic shear stress, sedimentation stability and other parameters were determined while varying polymer compositions and concentrations, ionic strength of the solution, nature of low molecular weight salts, concentration of dispersion phase, pH of the medium and temperature.
1 Nitta Y, Takahashi R, Nishinari K (2010) Biomacromolecules 11:187-191.
2 Moraes ICF, Fasolin LH, Cunha RL, Menegalli FC (2011) Brazilian Journal of Engineering 28:483-494.
3 Valiev OI, Sharov O, Kletter VY, Mulyukov RA, Borisov IM (2013) Bulletin of Bashkir University [Vestnik Bashkirskogo universiteta] 18:52-55. (In Russian)
4 Maksina E, Guryanov AO, Ermakov VV, Bykov DE, Ljamin AV (2013) Proceedings of the Samara Scientific Center of the Russian Academy of Sciences [Izvestiya Samarskogo nauchnogo tsentra Rossiyskoy akademii nauk] 15:1850-1852. (In Russian)
5 Minibaev VV, Ilyin IA, Pesterev SV (2009) Drilling and Oil [Bureniye i neft’] 10:44-46. (In Russian)
6 Dudlya N, Hairov GB, Tretyak AY, Pink YN (2007) Flushing fluid drilling [Promyvochnyye zhidkosti v burenii]. Part 1. Publishing House of KBTU, Almaty, Kazakhstan. (In Russian)
7 Sharafutdinov ZZ, Sharafutdinova RZ (2004) Petroleum engineering [Neftegazovoye delo] 1:1-21. (In Russian)
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-ND 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.