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All Journal Jurnal Teknik Mesin dan Mekatronika (Journal of Mechanical Engineering and Mechatronics) Abdimas Universal Jurnal Penelitian dan Karya Ilmiah Lembaga Penelitian Universitas Trisakti INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY Jurnal AKAL: Abdimas dan Kearifan Lokal Petro : Jurnal Ilmiah Teknik Perminyakan JURNAL ABDI MASYARAKAT INDONESIA (JAMIN) Journal of Earth Energy Science, Engineering, and Technology Jurnal Eksakta Kebumian Scientific Contributions Oil and Gas
Pauhesti Pauhesti
Universitas Trisakti
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ANALISIS DESAIN SQUEEZE CEMENTING PADA SUMUR APR-04 Aprilia C. Lauma; Maman Djumantara; Pauhesti Pauhesti
JURNAL PENELITIAN DAN KARYA ILMIAH LEMBAGA PENELITIAN UNIVERSITAS TRISAKTI Vol. 8 No. 2 (2023)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/pdk.v8i2.15083

Abstract

Cementing merupakan salah satu faktor terpenting dalam kegiatan pemboran yang dimana kegiatan ini terbagi atas primary cementing dan secondary cementing. Squeeze cementing adalah bagian dari secondary cementing dimana merupakan penyemenan ulang dalam rangka perawatan sumur, menutup zona perforasi yang sudah tidak produktif lagi. APR adalah salah satu lapangan dari banyak lapangan di daerah Sumatra selatan yang dikelola oleh PT. Pertamina Hulu Rokan zona. 4. Metodologi yang digunakan pada penelitian ini bersifat deskriptif yakni menggambarkan dengan penjelasan mengenai parameter-parameter pada pekerjaan squeeze cementing.Penyemenan dilakukan pada kedalaman 1096 m hingga 1097,5 m. Total semen yang digunakan pada penyemenan adalah 42 sak. Penyemenan ini dikatakan berhasil ketika saat uji pressure, tidak terdapat semen yang masuk kedalam formasi dan top of cement berada pada titik yang diharapkan yakni pada kedalaman 3513,95ft.
Performance Evaluation of Tween 60 Surfactant for EOR: Interfacial Tension Reduction and Microemulsion Formation Pauhesti Pauhesti; Ridha Husla; Sri Feni Maulindani; Apriandi Rizkina Rangga Wastu; Nadira Cahya Sutikna; Lailatul Wastiyah; Ade Kurniawan Saputra
Scientific Contributions Oil and Gas Vol 48 No 3 (2025)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v48i3.1812

Abstract

Enhanced Oil Recovery (EOR) techniques are essential for maximizing crude oil extraction from mature reservoirs. Surfactant injection, particularly using surfactants such as Tween 60, has shown great potential in reducing interfacial tension (IFT) and enhancing oil recovery. This study evaluates the performance of Tween 60 for EOR applications, focusing on its aqueous stability, phase behavior, IFT reduction, and core flooding efficiency at temperatures of 60°C and 80°C. The research addresses a gap in the literature by examining the long-term stability and phase behavior of Tween 60 at these temperatures. Aqueous stability tests over seven days indicate that Tween 60 remains clear and stable at 60°C but becomes cloudy and unstable at 80°C. Phase behavior tests reveal that a 0.5% concentration of Tween 60 produces the largest middle-phase microemulsion (5.75% volume), forming a bicontinuous Winsor III microemulsion that enhances oil-water interaction. IF T tests using a spinning drop tensiometer show a reduction in IFT to 0.00525 dyne/cm. Core flooding tests confirm that surfactant injection contributes an incremental oil recovery of 8.33% beyond what was achieved by waterflooding without surfactant, increasing the total recovery factor from 62.5% to 70.83%. However, limitations such as the short testing period (14 days) and the use of a single type of oil (39 ° API) underscore the need for further research.
USE OF ANOVA STATISTICAL METHOD IN EVALUATION OF TOFU WASTEWATER USED FOR SPIRULINA CULTURE MEDIUM ENRICHED WITH UREA AND NaHCO3 Mustamina Maulani; Gabriella Jasmine; Rosmalia Dita Nugraheni; Maman Djumantara; Asri Nugrahanti; Bayu Satiyawira; Cahaya Rosyidan; Lisa Samura; Harin Widiyatni; Pauhesti Pauhesti
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY VOLUME 6, NUMBER 2, OCTOBER 2023
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/urbanenvirotech.v6i2.16933

Abstract

Indonesia has a large amount of liquid waste originating from the tofu industry. Currently, the treatment of tofu industrial wastewater is carried out using both anaerobic and aerobic methods, but both methods still have several weaknesses. In this study, the tofu industrial wastewater was utilized as a culture medium for Spirulina sp. to provide economic value from wastewater that can be used as bioethanol, pharmaceuticals, and food products rich in omega 3, chlorophyll, carotenoids. Aim: The growth of Spirulina sp. is closely related to the availability of macro and micronutrients as nutrients and the influence of environmental conditions, so this study was aimed to see the best variation of the addition of urea and NaHCO3 as additional nutrients to maximize growth and cell density of Spirulina sp. with tofu industrial wastewater media. Methodology and Results: This study was done by culvitating Spirulina sp in the growth media, measuring the Optical Density (OD), and analyzing quantitatively and using ANOVA on IBM SPSS Statistics version 20. The study indicated that adding urea and NaHCO3 to Spirulina sp. had no effect on cell density and growth rate. Treatment with addition of urea 0.36 g/500 ml without additional of NaHCO3 had the highest growth rate, 0.00852/day, and the highest cell density value on Spirulina sp. growth. Conclusion, significance, and impact study: The tofu liquid waste can be used as a new alternative used as fertilizer because in the liquid tofu waste, it provides the nutrients needed by Spirulina sp.
Co-Authors Ade Kurniawan Saputra Adi Novriansyah Adven Charlos M Pappin Alvin Henk Apriandi Rizkina rangga Wastu Aprilia C. Lauma Aqlyna Fattahanisa Asri Nugrahanti Bayu Satiyawira Cahaya Rosyidan Djoko Sulistyanto Djoko Sulistyanto Gabey Jane Gabriella Jasmine Ghanima Yasmaniar Harin Widiyatni Kartika Fajar Hartono Lailatul Wastiyah Lestari Said Lestari Said Maman Djumantara Mardiana, Dwi Atty Mixsindo Korra Herdyanti Muhammad Ibnu Muslim Abdurrahman Mustamina Maulani Nadira Cahya Sutikna Nandito Davy Onnie Ridaliani, Onnie Prayang Sunny Yulia Puri Wijayanti puri wijayanti Ridha Husla Rizka Nada Setyani Rosmalia Dita Nugraheni Samsol Samura, Lisa Shabrina Sri Riswati Shabrina Sri Riswati Sri Feni Maulindani Sugiatmo Kasmungin Syamsul Irham Tia Agusta Trijana Kartoatmodjo Widia Yanti Widia Yanti Wildan Tri Koesmawardani Wisup Bae Yarra Sutadiwiria Yulia, Prayang Sunny