Statistical Analysis Of Polymer-Based Gel For Water Shut-Off Treatment In Oilfield Application

• Main Author: Sobri, Nursyuhaida Mohamad
• Format: Thesis
• Language: English
• Published: 2016
• Subjects: T Technology; TP1-1185 Chemical technology
• Online Access: http://eprints.usm.my/41606/1/Statistical_Analysis_Of_Polymer-Based_Gel_For_Water_Shut-Off_Treatment_In_Oilfield_Application.pdf; http://eprints.usm.my/41606/
• Institution: Universiti Sains Malaysia

Air yang dihasilkan di telaga minyak akan mengurangkan pengeluaran minyak dan gas dan ia merupakan sisa terbesar di dalam industri minyak dan gas. Untuk mengurangkan pengeluaran air yang tidak diingini, rawatan kimia menggunakan polimer adalah fokus dalam kajian ini. Biopolimer gam xanthan dan bahan sambungan silang, kromium (III) asetat digunakan dalam kerja-kerja penyelidikan ini. Penambahan bahan tambah polimer seperti gam guar (GG), Hydroxypropyl methylcellulose (HPMC) dan polyvinyl pyrrolidone (PVP) juga digunakan dalam kajian ini. Salah satu teknik statistik yang digunakan adalah kaedah permukaan respons (RSM), penggunaan Rekabentuk Eksperimen (DOE). Masa sasaran untuk pengegelan fasa gel mengalir adalah antara 180 minit hingga 240 minit dan masa yang pengegelan fasa gel menjadi pepejal adalah antara 1000 minit hingga 1440 minit. Larutan xanthan-kromium (XC) menjadi gel mengalir pada 180 minit dan gel pepejal pada 1265 minit. Untuk larutan XCG dan XCH, gel mengalir berlaku pada masa 240 minit dan larutan XCP pada 235 minit. Masa gel pepejal bagi larutan XCG, XCH, dan XCP masing-masing berlaku pada 1015 minit, 1440 minit dan 1410 minit. XCP mempunyai rintangan yang lebih baik terhadap larutan air garam dimana perubahan dapat dilihat selepas 80 hari. Sementara itu, larutan XC berubah apabila bertemu dengan air laut sintetik selepas 75 hari. Kajian percirian terhadap larutan menujukkan kelikatan berkurangan apabila suhu bertambah, manakala kelikatan semingkat apabila masa berlalu. ________________________________________________________________________________________________________________________ Produced water decreases the production of oil and gas and it is currently the largest waste stream in oil and gas industry. In order to reduce the amount of produced water, a chemical treatment using polymers is the focus in this research. Biopolymer xanthan gum (XG) and cross-linker, chromium (III) acetate (Cr(III)) are used in this research work. Polymer additives such as guar gum (GG), Hydroxypropyl methylcellulose (HPMC) and polyvinyl pyrrolidone (PVP) are also used in this research work. One of the statistical techniques used is response surface methodology (RSM), the application of Design of Experiment (DOE). The targeted gelation time of flowing gel phase is between 180 minutes to 240 minutes and the gelation time of solid gel phase is within 1000 minutes to 1440 minutes. Xanthan-chromium (XC) solution form flowing gel at 180 minutes and solid gel at 1265 minutes. For XCG and XCH solutions, the flowing gel phase is formed at 240 minutes and XCP solution form at 235 minutes. Solid gel phase for XCG, XCH and XCP solutions is formed at 1015 minutes, 1440 minutes and 1410 minutes respectively. XCP have better resistance towards brine solutions as the changes can be seen after 80 days. Meanwhile, XC solution changes when meet with synthetic seawater after 75 days. Characterization studies of the solutions shows that the viscosity decreases as the temperature increases, meanwhile the viscosity increases as the time passes by.