Development of Modified Rhizophora spp.Tannin Biopolymer Additive in Drilling Fluid System for High Temperature Well Applications

摘要

The main objective of the current work is to investigate the performance of Rhizophora spp.tanninlignosulfonate(RTLS)as a deflocculant in water-based drilling fluid(WBDF).Rhizophora spp.tannin(RT)was extracted from the barks,waste of conventional charcoal production.RTLS was synthesized and characterized by using Fourie transform infrared spectrometer(FT-IR)over a wide range of wavelength from 400 to 4000 cm?1 to determine the main functional group,and using thermogravimetric analysis(TGA)with the temperature range from 25 to 600°C to evaluate the thermal properties.Rheological properties of WBDF with the addition of RTLS as deflocculant were analyzed at room temperature condition and compared with industrial chrome-based deflocculant.The TG analysis revealed that RTLS has good thermal stability because the degradation temperature was observed at approxmately 280°C.The rheological properties demonstrated the yield point and the gel strength were reduced by addition of RTLS that indicated an improvement of the rheological performance.However,the trends for plastic viscosity showed a fluctuation with increasing in RTLS concentration because of the addition of suspended solid component in WBDF.