DESING AND APPLICATION OF ACID-ALKALI-SURFACTANT-POLYMER FLOODING FORMULATION FOR HIGH SALINITY CARBONATE FORMATIONS

• Main Author: KALWAR, SHUAIB AHMED
• Format: Thesis
• Language: English
• Published: 2014
• Subjects: QE Geology
• Online Access: http://utpedia.utp.edu.my/21247/1/2014-PETROLEUM-DESIGN%20AND%20APPLICATION%20OF%20ACID-ALKALI-SURFACTANT-POLYMER%20FLOODING%20FORMULATION%20FOR%20HIGH%20SALINITY%20CARNBONATE%20FORMATIONS-SHUAIB%20AHMED%20KALWAR-.pdf; http://utpedia.utp.edu.my/21247/

In this study, a new Acid-Alkali-Surfactant-Polymer (AASP) flooding formulation was designed by incorporating acrylic acid with conventional Alkali-Surfactant- Polymer (ASP) system to prevent precipitation problems. The AAPS formula was aimed to overcome the precipitation caused by the reaction of injected chemicals such as alkali and surfactant with divalent ions which exist both in the carbonate minerals and formation brine. The ASP formula was also developed to simulate the conventional ASP flooding and to compare the performance of AASP and ASP^Ehestudy was commenced with fluid-fluid compatibility tests to find an optimum acidalkali ratio for keeping chemical solutions without any precipitations. The impact of precipitation inhibitoron interfacial tension and viscosity was investigated using hard brine of 59,940 ppm TDS. Finally, natural imbibition tests and core flooding experiments were performed to examine oil displacement by the optimum chemical combinations. The optimum acid-alkali ratio was found to be 0.6:1.0.