<![CDATA[Abstrak Pada tahap pengembangan untuk meningkatkan perolehan minyak bumi terdiri dari 3 tahapan yaitu:primary recovery, secondary recovery, dan tertiary recovery (Enhanced Oil Recovery). Penelitian menggunakan metode Enhanced Oil Recovery di laboratorium Enhanced Oil Recovery Universitas Trisakti. EOR (Enhanced Oil Recovery). terdiri dari injeksi kimia,injeksi uap panas, injeksi gas, dan injeksi microbial. Metode EOR yang dilakukan pada penelitian adalah injeksi surfaktan. Konsentrasi surfaktan yang digunakan 0,3%, 0,4%, dan 0,75% dengan variasi temperatur 30o C dan 70o C. Prosedur penelitian diawali dengan pembuatan brine dan pembuatan surfaktan. Kemudian perhitungan sifat fisik larutan dan perhitungan sifat fisik batuan sampel. Pada Surfaktan konsentrasi 0,2%, 0,3%, 0,4%, 0,5%, dan 0,75% dilakukan uji IFT (Interfacial Tension) untuk mendapatkan nilai CMC (Critical Micelle Concentration). Nilai CMC berada di 0,4% pada temperatur 30o C dan 70o C. Kemudian dilakukan saturasi minyak, dilanjutkan dengan injeksi brine dan injeksi surfaktan didapat recovery faktor. Dari penelitian, didapat hasil Recovery faktor yang dilakukan pengujian di konsentrasi 0,3%, 0,4%, dan 0,75% di temperatur 30o C didapat RF sebesar 33%, 45,8%, dan 42,2%. Recovery factor pada konsentrasi 0,3%, 0,4%, dan 0,75% di temperatur 70o C sebesar 37,2%, 55%, dan 46,7%. Dihasilkan recovery faktor yang paling bagus di konsentrasi 0,4% di temperatur 30o C dan 70o C Kata kunci: Enhanced Oil Recovery,injeksi kimia,injeksi surfaktan, minyak jelantah. Abstract At the development stage to increase oil recovery, it consists of 3 stages, namely: primary recovery, secondary recovery, and tertiary recovery (Enhanced Oil Recovery). The study used the Enhanced Oil Recovery method in the Enhanced Oil Recovery laboratory at Trisakti University. EOR (Enhanced Oil Recovery). consists of chemical injection, hot steam injection, gas injection, and microbial injection. The EOR method used in this study is surfactant injection. The surfactant concentrations used were 0.3%, 0.4%, and 0.75% with variations in temperature of 30o C and 70o C. The research procedure began with making brine and making surfactants. Then the calculation of the physical properties of the solution and the calculation of the physical properties of the rock samples. At 0.2%, 0.3%, 0.4%, 0.5%, and 0.75% surfactants, the IFT (Interfacial Tension) test was performed to obtain the CMC (Critical Micelle Concentration) value. The CMC values were at 0.4% at 30oC and 70oC. Then oil saturation was performed, followed by brine injection and surfactant injection to obtain recovery factor. From the research, it was found that the recovery factor was tested at concentrations of 0.3%, 0.4%, and 0.75% at a temperature of 30o C. The RF was 33%, 45.8%, and 42.2%. Recovery factors at concentrations of 0.3%, 0.4%, and 0.75% at a temperature of 70o C were 37.2%, 55%, and 46.7%. The best recovery factor was obtained at a concentration of 0.4% at temperatures of 30o C and 70o C. Keywords: Enhanced Oil Recovery, chemical injection, surfactant injection, waste cooking oil]]>
