ANALISIS DAN PENGAMATAN COUNTER FLOW PADA PROSES IMBIBISI SPONTAN PADA SANDSTONE DAN PENGARUH KONSENTRASI SURFAKTAN, SOAKING TIME, DAN BEDA UKURAN CORE (STUDI LABORATORIUM)

• Main Author: Wilantara, Bayu
• Format: Final Project
• Language: Indonesia
• Subjects: Pertambangan dan operasi berkaitan
• Online Access: https://digilib.itb.ac.id/gdl/view/61032
• Institution: Institut Teknologi Bandung

Today fossil energy consumption is increasing due to the economic growth of countries of the world especially developing countries such as Indonesia, which is growing by leaps and bounds. World crude oil demand in 2002 from 78 million barrels to 103 million barrels by 2015 and would reach 119 million barrels in 2025 (IEO, 2005). Thus increased crude oil production to meet these needs. One of the increase in crude oil production can be through the production of heavy oil. Based on data from the International Energy Agency noted that the potential of heavy oil resources worldwide is 15% of the total world's oil resources. The oil is trapped in the reservoir. Sandstone reservoir can be manifold. The method can be used to exploit this potential is the EOR (Enhanced Oil Recovery) with the use of chemical surfactants. Surfactants are organic compounds that can lower the interfacial tension between the non-wetting fluid by a wetting fluid so it can be increasing shove efficiency as well as changing the wettability of rock so the oil that resides in rock pores more easily pushed out. This laboratory study aimed to prove the case on the counter flow was observed through the reservoir sandstone core samples, reviewing the effects of concentration, soaking time, the height of the core, and the core diameter of the oil recovery. The laboratory study consisted of three phases, namely the manufacture of artificial sandstone core type, core mounting holder, and spontaneous imbibition test. In the manufacture of artificial cores using a composition of 50% quartz sand and 50% cement. Artificial cores made cylindrical tube with different heights is 3 cm, 4 cm, and 5 cm with a diameter of 2.5 cm and a height of 4 cm with a core with a diameter of 3.6 cm. To cover the mounting stage, the core and the blanket shut down cores. It aims to make there is only one path for incoming surfactant and oil were forced out. The third stage is a spontaneous imbibition test, which uses Semar S14A *, surfactant Oleyl OGRINDO, and water formation. SeMAR used consisted of some variation in the concentration of 0.5%, 1%, 2%, 3%. While the concentration of Oleyl OGRINDO only 3%. From this spontaneous imbibition test, proved that the counter flow occurs in the core sample where oil out on the open side of the core. For RF (Recovery Factor) is best obtained with surfactant concentration SeMAR S14A * 3% on every core height 3 cm, 4 cm, and 5 cm. The fastest rate of imbibition was also demonstrated by SeMAR S14A * 3%. Cruising altitude cores showed the depth of the surfactant. At the core 3 cm and 4 cm RF value is not too much different, but the core 5 cm smaller than the value of the RF core 3 cm and 4 cm cores. This shows that the surfactant running out of power or energy to imbibition oil remaining in the pores deeper. Imbibition rate of speed also decreased with increasing thickness of the core. Diameter affects the speed of a surfactant to enter the core. The larger the core diameter, the greater the shove power required by the surfactant. With the same concentration of 2.5 cm diameter cores have RF values greater than 3.6 cm cores. This shows the greater diameter of the core, the greater the shove power required by the surfactant. While the imbibition rate decreases with increasing core diameter.