02909ntm a2200349 i 4500 MY-KuUP 20260806121416.0 t|||||r|||| 000 0 ta 260806t20252025my a|||fr|||| 000 0 eng d THE0010914 (Local) Hardback UMPSA eng UMPSA rda FTKKP .Z35 2025 r Bc. Mohammad Zaaim Bin Molsar, author. Enhancing thermal stability and performance of lignosulfonate-based drilling fluids through sulfonation in the presence of phosphorous compounds for high-temperature oil well applications / Mohammad Zaaim Bin Molsar Kuantan, Pahang : UMPSA, 2025 © 2025 vii, 39 pages : illustrations ; rdacontent text rdamedia unmediated rdacarrier volume rda text file PDF Faculty of Chemical and Process Engineering Technology Final Year Report (Bachelor of Technology Mechanical Engineering (Petroleum) with Hons ) -- Universiti Malaysia Pahang Al-Sultan Abdullah - 2025 Include bibliographical reference Drilling operations require mud systems for withstanding high temperatures. This can be achieved by using novel substances equipped with the potential for high-density drilling fluids and better environmental compliance. The shortcoming in this regard is experienced in high-temperature zones whereby drilling fluids such as lignosulfonates do not show anticipated intended performances. This study deals with modification in lignosulfonates by using phosphorous compounds. Such a fundamental scientific approach addresses rheology, thermal stability, and fluid loss from 30-200°C perforations. These modified materials were established through diverse characterization techniques including FTIR, TGA, SEM, XRD, elucidating that chemical modifications were successful, and the structures were modified. Sympathetic fluids will develop an optimized rheological performance where viscosity, gel strength, and yield, as well as thermal stability, are treated. With high-temperature filtration tests, the new lignosulfonates in drilling fluids managed effectively lower fluid loss while keeping mud cake integrity intact. These results will build evidence to suggest that phosphorusmodified lignosulfonates can potentially contribute to the enhanced efficiency and environmentally sustainable operation of high-temperature oil wells. Field tests are necessary for the next consideration, so that further optimization may be implemented with the goal of industrial development. Faculty of Chemical and Process Engineering Technology Dissertations Universities and colleges Dissertations Theses Dissertations https://umpir.ump.edu.my/id/eprint/48052 lcc PSM 0 0 lcc 0 0 10000 10000 2026-08-06 0 FTKKP .Z35 2025 r Bc. T000004423 2026-08-06 12:15:16 2026-08-06 PSM 105410 105416