Banca de DEFESA: RAFAELLY LIRA CAVALCANTI LIMA
Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.DISCENTE : RAFAELLY LIRA CAVALCANTI LIMA
DATA : 04/11/2019
HORA: 14:00
LOCAL: Auditório do NUPPRAR/UFRN
TÍTULO:
Reuse of produced water in drilling fluids based on reverse emulsion and its influence on the fluid properties
PALAVRAS-CHAVES:
Reuse of produced water, drilling fluid, oily residue and olefin base fluid
PÁGINAS: 100
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Química
RESUMO:
Oil production plays a key role in the economy, ensuring the society development. However, during all its stages, including drilling, there are environmental impacts that need to be remedied. An old environmental problem is associated to the toxic waste that cannot be arbitrarily dumped into the environment. Severe damage can be caused if inappropriate treatment is applied to the residue. In the oil industry the drilling fluid is important for the development of the drilling operation. However, the high volumes of fluids after this stage become residues, as well as the produced water is a high volume residue. The seek to reduce the environmental liabilities generated in the production of drilling fluids, with the reuse of produced water in the manufacture of synthetic olefin base fluids, shows that the oil industry can reinvent itself and work to absorb its own waste. Thus, avoiding the consumption of clean water in the new formulations and reduces the final residual volume. In this work, olefin-based drilling fluids containing 20-40% of produced water without treatment were formulated and tested. Numerous tests have been carried out with both the water produced and the drilling fluids. The potential for inhibition of the residue and inhibition compatible with the aqueous phases already used for olefin-based fluids were evaluated, the produced water simulated a residue with a high degree of difficulty in relation to its treatment, containing emulsified oil, in addition real produced water (AP) was also tested. Comparisons were made between the fluids currently used and those prepared with the different water produced. Through the experimental design 33 it was possible to verify the influence of the produced water, the viscosifier and the emulsifier in the rheological properties and the electrical stability of the fluid emulsions. In addition to the viscosimeter, a rheometer was used in order to obtain higher reliability results. Corrosion tests were carried out in the produced water, and in the formulated fluids, being compared its corrosion potential in relation to the currently used olefin base fluid. The tests showed that the produced water, although corrosive, does not affect the corrosion potential of the drilling fluids, since this as it is emulsified is not the outer wetting phase of the fluid. Knowing that the drilling fluid must meet the needs of the drilling operation, developing its functions satisfactorily, it was verified the behavior of the rheological parameters and whether the residues could affect the performance of the fluid in relation to the well cleaning. Simulations were performed in commercial software for a typical offshore well geometry. According to the directional simulation, the last phase corresponding to the open pit starts already in the horizontal section of 90 °. The manufactured fluids presented a performance equivalent to those already used and similar corrosion. For all the flows studied, the simulation presented satisfactory cleaning for the following criteria: solids concentration less than 6% and relative height less than 15%. Considering the clean well and heterogeneous cleaning pattern, making it a promising alternative in the area of fluids.
MEMBROS DA BANCA:
Externo ao Programa - 347289 - AFONSO AVELINO DANTAS NETO
Externo à Instituição - PEDRO TUPÃ PANDAVA AUM - UFPA
Presidente - 347057 - TEREZA NEUMA DE CASTRO DANTAS
Interna - 1531209 - VANESSA CRISTINA SANTANNA