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Journal : Journal of Earth Energy Science, Engineering, and Technology

Salinity Effects on Anionic AEC Surfactant with Crude Oil: IFT, Phase Behavior, Solubilization, Microemulsion Viscosity Swadesi, Boni; Azmia, Fadhlan Barrul; Pratiknyo, Avianto Kabul; Kurniawan, Aditya; Suwardi
Journal of Earth Energy Science, Engineering, and Technology Vol. 8 No. 3 (2025): JEESET VOL. 8 NO. 3 2025
Publisher : Penerbitan Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/tqms0g23

Abstract

The investigates the influence of NaCl salinity (0–32,000 ppm) on the performance of Alkyl Ethoxy Carboxylate (AEC) anionic surfactants for Enhanced Oil Recovery (EOR), using light crude oil as a model. Salinity fundamentally affects the system's Interfacial Tension (IFT), phase behavior, solubilization, and microemulsion rheology. The objectives were to map these effects and determine the optimal operational salinity and surfactant working concentration. The working concentration of 1.75% w/w was established above the Critical Micelle Concentration (CMC), determined from the breakpoint of the IFT curve versus log AEC concentration. IFT was precisely measured using a spinning-drop tensiometer. Phase behavior was characterized via a salinity scan to map the Winsor I–III–II transition, and the solubilization ratio was calculated from the equilibrium volume of the middle phase. Microemulsion viscosity was measured using a Brookfield DV3T viscometer with a stepwise shear protocol. The key results showed that an optimum salinity window produced ultra-low IFT, led to the formation of Winsor III microemulsions with a balanced oil/water solubilization ratio, and caused a viscosity peak that coincided with the Hydrophilic-Lipophilic Difference (HLD) ≈ 0 conditions. The microemulsions exhibited characteristic shear-thinning behavior across the tested shear rates. Salinity systematically controls the key physicochemical properties of the AEC–crude oil system. The findings provide: selecting the working concentration based on the CMC test and choosing the salinity at HLD ≈ 0 maximize residual oil mobilization while minimizing phase instability risks. Operational implications include precise brine selection, surfactant dosage control, and adaptive staged slug injection strategies.
Co-Authors Aan Efendi Abdul Hakim Abroto Adi Prasetyo Adib Norma Respati ADIL, AHMAD Aditya Kurniawan Afandi, Moh Yusuf Afilia Perwati Agung Mugi Prabowo Agung Mugi Widodo Ahya Fathul Khoeriyah Aidah Rahmah Aldi Irvan Syahputra Alviani Yulyana Fertiaz Andi Setiawan Andryawan Anggoro Mukti, Alfian Anisa Ika Pratiwi Annisa Aulia Fitri Arga Arga, Arga Arif Billah, Arif Arsyad, Muh. Nur Fajar Asep Ahmad Z.A Asiah Jamil Auliya Safira Putri Aulria, Siti Nurhaliza Mutia Azmia, Fadhlan Barrul Bagus Andika Fitroh Boboy, Yuni Marsalina Boediningsih, Widyawati Boni Swadesi Budi Santoso Budiyanto, Azis Burhanuddi, Sudirman Choirul Anwar Daffaraza Ramadhan Darmawan Dewi, Tria Rosana Diah Ambarumi Munawaroh Dina Indriana Dody Haryadi Dyah Ochtorina Susanti Edy Saputra Efendi, A'an Ehwanti Eko Susilo Emanto Fahamsyah Endang Nurhayati Endang Sulistyaningsih, Tuti Setyaningrum, Didik Indradewa Achmadi Priyatmojo dan Erika Meidina FAHRIZAL Femmy Silaswaty Faried Fitri Rokhimah Hariyadi, Rahmat Henky Agung Nugroho Hermanu Widjaja, Hermanu Heru Iswanto, Azis Hudain, Muh. Adnan Humiati Ida Bagus Budhi Surya Adnyana Idris, Maulana Fahmi Ikhsan Zulkarnaen Ilmi, Andi Taufiq Nur Imam Suyudi Irma Wardani Irvan Irwanto, Meizal Jalane, Mildrett De Fatima Jamaluddin, Juniarto Karim, Achmad Khoirunisa Rahmadia Kossay, Methodius Kristina Sulatri Libria Widiastuti M. Noor Harisudin M. Rachmat Kasmad M.J NASHIR Mamluaturrahmatika, Annisa Mappaompo, M. Adam Minati Rina Hardiyana MMSI Irfan ,S. Kom Moh. Ali Muh Syahrul Saleh Muhammad Azriel Alwi Muhammad Munib Khusni Malik Muhammad Risky Suwardi Nanang Adie Setyawan Nasution, Uji Kuatro Neneng Roiyatul Muawanah Nunik Agustriani Nur Adilah Nurfina Aznam Nurussyariah Oktariani, Putri Pifi Nugraheni, Jacika Pramono Hadi Pratiknyo, Avianto Kabul Purwanti Putri Awaliya Dughita Putri Pratiwi Rahmawati, Dewi Aprilia Rahmi Ramli Randrikasari, Octaviana Ratmo Rerung, Charmila Tandi Restu Budiyanti Rini Dwiastutiningsih Rizky Ardiansyah Sipayung Rohita Rujiman Sabar, Muhammad Sardi Saptianing Sesatonis, Yos Adoni Sesatonis Shofia, Nisa Sholiha, Nabila Fairuz Sigit Ari Prabowo, Sigit Silfiah, Rossa Ilma Sintha Sih Dewanti Sirojuzilam Hasyim Sitti Mukarromah Slamet Riyadi Solikah, Umi Nur Sri Harti Widyastuti Sri Mayasari Sri Riris Sugiyarti Srie Juli Rachmawatie Stenly R. Paparang Sudiadharma Surya, Ibnu Susapti, Peni Syahruddin Syamsuddin Thomas Aribowo Kristianto Tjahyandari Suryaningtyas1, Dyah Tri Pamujiasih Tubagus, Muh Tubagus Naufal Fahmi Vatiana Satyani Venny Indria Ekowati Vera Sylvia Saragi Sitio Vidi Mercyana Wahyu Hidayat Wahyuddin Wawan Kurniawan Widyawati Winduro, Wirid Yuanita FD Sidabutar Yudhia Ismail