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All Journal PROSIDING SEMINAR NASIONAL CENDEKIAWAN Scientific Contribution Oil and Gas LEMBARAN PUBLIKASI MINYAK DAN GAS BUMI
Hestuti Eni
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Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Education Energy Engineering Environmental Science

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ANALISA KARAKTERISTIK SURFAKTAN PADA SPONTANEOUS IMBIBITION DI LAPANGAN “A”, SUMATERA SELATAN Ratu Atikah Balqis; Rini Setiati; Maman Djumantara; Hestuti Eni
PROSIDING SEMINAR NASIONAL CENDEKIAWAN PROSIDING SEMINAR NASIONAL CENDEKIAWAN 2018 BUKU I
Publisher : Lembaga Penelitian Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/semnas.v0i0.3505

Abstract

Lapangan "A" di Sumatera Selatan adalah salah satu lapangan tua di Indonesia dan pelaksanaan Enhanced Oil Recovery (EOR) menjadi fokus utama. Setelah melewati proses screening metode EOR, injeksi kimia merupakan metode terbaik yang dapat diimplementasikan dan makalah ini menunjukkan analisis karakteristik surfaktan pada konsentrasi yang paling efisien. Secara dasar, proses surfaktan dapat menguras minyak yang terperangkap secara drastis dengan mengurangi tegangan antar muka dan meningkatkan efisiensi pendorongan. Di laboratorium, surfaktan yang diteliti menggunakan tiga konsentrasi; 0,3%, 0,5% dan 1%. Setiap konsentrasi surfaktan akan diuji untuk mendapatkan konsentrasi paling efisien dalam menurunkan nilai tegangan antar muka. Kemudian konsentrasi paling efisien dari larutan surfaktan yang terlarut dalam air formasi sintetik lapangan ”A” akan dilanjutkan ke proses spontaneous  imbibition pada oven dengan suhu reservoir (60oC) untuk menunjukkan kinerja surfaktan dalam kondisi termal dan untuk memberikan efisiensi perolehan minyak. Faktor-faktor utama yang mengarah pada peningkatan kinerja adalah emulsifikasi antara surfaktan-minyak untuk memfasilitasi produksi dan mengurangi tegangan antar muka yang stabil, diraih oleh surfaktan berkonsentrasi 0,3%. Makalah ini memberikan studi kelayakan injeksi bahan kimia yang terjangkau di salah satu lapangan di Indonesia dan penjelasan sederhana bagi orang awan dalam meningkatkan produktivitas di industri Minyak dan Gas di Indonesia.
SUBSTITUTION OF PETROLEUM BASE WITH MES BASE SURFACTANT FOR EOR: LABORATORY SCREENING Sugihardjo; Hestuti Eni
Scientific Contributions Oil and Gas Vol. 37 No. 1 (2014): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.37.1.212

Abstract

Most of Indonesian oil fi eld had been categorized as mature fi led in which production had been declinedfor some time. Therefore EOR (Enhanced Oil Recovery) technology is a must to be implemented to these kinds of fi eld. There are several EOR technologies had been employed successfully in laboratory and alsofi eld scales, including gas, thermal, and chemical injection. Most Indonesian oil fi elds have productivelayers depths below 2200ft that will not suitable for gas injection. So that chemical injections become animportant alternative that can be implemented to more wide range of depths. These technologies coveralkaline, surfactant, and polymer injection. This paper will highlight the selection and formulation ofsurfactant formulated from MES (Methyl Ester Sulfonates) produced from Palm Oils. These palm oils areavailable very abundant in Indonesia due to plenty farm palm oil in Indonesia. Normally Surfactants areformulated from petroleum sulfonates which are generated from petroleum base. By Using Surfactant that willbe manufactured from palm oil, it will be expected that the price will be cheaper compare to the surfactantfrom petroleum. A series of researches have been done to select the sources of palm oils, producing MESby sulfonation processes, and fi nally surfactant screening for EOR. Several types of MES produced fromvaries of palm oil taken from market such as: CPO (crude palm oil), several packed palm oils of differenttrademarks have been generated. These MES, then, have been given codes to differentiate among these MESsuch as: 1. CCO-MES (A), 2. CCO ME-MES (B), 3. Oleic Acid- MES (C), 4. Natrium Bisulfi t- MES1 (D),5. ME+H2SO4-MES2 (E), 6. CPO-MES (F). These MES production, then, have been formulated to becomesurfactant formula by adding some chemicals and solvent. After that alkaline ((Na2CO3) with optimizedconcentrations were added to generate the best EOR properties. All those Surfactant-MES have been testedusing Lemigas standard laboratory EOR screening; those are compatibility tests, IFT measurements, thermalstability, adsorption, fi ltration, phase behavior, imbibitions and core fl ooding. The result of the screening ofthe MES-chemicals mixtures shows that mixture of CPO-MES (F) with chemical and solvent with the mixturecomposition denoted as FChS811 has the best performance. 1% of this mixture has the best properties forEOR after adding 0.1% of Alkaline (Na2CO3). Laboratory test results indicates that fulfi ll screening criteriasuh as good compatibility and no precipitation, low IFT, thermal stability, low adsorption, low fi ltrationratio, Winsor type-I phase behavior, high RF on imbibition and core fl ooding tests. This Surfactant-MESmixture has a potential to be implemented for a fi eld trial with Huff and Puff method.
CO-SURFACTANT POLYETHYLENE GLYCOL MONO-OLEATE IN THE ORMULATION OF NATURAL BASED-SURFACTANT FOR CHEMICAL EOR (SURFAKTAN PENDAMPING POLIETILEN GLIKOL MONO-OLEAT PADA FORMULASI SURFAKTAN BERBASIS NABATI UNTUK INJEKSI KIMIA EOR) Yani Faozani Alli; Letty Brioletty; Hestuti Eni; Yan Irawan
Scientific Contributions Oil and Gas Vol. 40 No. 1 (2017): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.40.1.278

Abstract

Natural-based surfactant such as methyl esther sulfonate, which is derived from palm oil, has increasingly become the focus of study for the last decade to improve oil recovery due to the abundant raw materials availability and the need for oil as a source of energy. Surfactant MES development with the targeted fluid reservoir characteristic has been conducted in the laboratory scale as well as in the field scale. In this study, the addition of polyethylene glycol mono-oleate as co-surfactant to enhanced oil recovery in the L oil field in Central Java was investigated in the laboratory scale through compatibility observation, IFT measurement, thermal stability and core flooding tests. The results showed that the presence of PMO improved the solubility of surfactant mixture in the water which formed one phase milky solution. Decreasing IFT as the crucial factor for surfactant flooding was also achieved until 10-3 dyne/cm and thermally stable for two months. Furthermore, core flooding experiments to study the performance of surfactant to recover oil production showed that the mixture of MES and PMO are able to enhance oil recovery until 55.35% Sor and have potential to be used as chemicals for chemical flooding in the targeted oil field. Surfaktan berbasis nabati seperti surfaktan metil ester sulfonat (MES) dari bahan minyak kelapa sawit telah menjadi fokus penelitian selama satu dekade terakhir untuk meningkatkan perolehan minyak, mengingat ketersediaan bahan baku kelapa sawit yang melimpah di Indonesia serta kebutuhan akan minyak sebagai sumber energi yang terus meningkat. Pengembangan surfaktan MES agar sesuai dengan karakteristik fluida reservoar lapangan target juga telah berhasil dilakukan dalam skala laboratorium dan skala lapangan. Pada penelitian ini, pengaruh penambahan surfaktan pendamping polietilen glikol mono-oleat (PMO) untuk meningkatkan kemampuan surfaktan dalam meningkatkan produksi minyak pada lapangan L di Jawa Tengah dalam skala laboratorium dilakukan melalui uji kompatibilitas, ujitegangan antarmuka (IFT), uji kestabilan termal dan uji core flooding. Hasil penelitian menunjukkan bahwa penambahan PMO sebagai surfaktan pendamping MES dapat meningkatkan kelarutan surfaktan di dalam air formasi terkait dengan keberadaan gugus etoksi yang mempunyai sifat antarmuka di dalam struktur molekul PMO. Penurunan IFT sebagai faktor penentu dalam injeksi surfaktan juga dapat dicapai hingga 10-3 dyne/cm, dan dapat bertahan hingga dua bulan pada suhu reservoar. Adapun pengujian kemampuan surfaktan dalam meningkatkan perolehan minyak melalui uji core flooding menunjukkan bahwa campuran surfaktan MES dan PMO dapat meningkatkan produksi minyak hingga 55.35% Sor dan berpotensi untuk dijadikan bahan injeksi kimia di lapangan target.
Investigation of Polymer Flood Performance in Light Oil Reservoir: Laboratory Case Study Dadan DSM Saputra; Bayu D Prasetiyo; Hestuti Eni; Yudha Taufantri; Ghifahri Damara; Yusuf D Rendragraha
Scientific Contributions Oil and Gas Vol. 45 No. 2 (2022): SCOG
Publisher : Testing Center for Oil and Gas LEMIGAS

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Abstract

The use of polymer solutions in the application of chemical EOR injection technology has a role in increasing oil recovery efforts by improving oil mobility in porous media. The addition of the polymer solution is expected to increase the viscosity value of the displacement fluid so that it can form a “piston-like” effect to increase the volumetric sweep efficiency of the light oil reservoir. The polymer used in this study was HPAM using 3 concentrations, namely 500 ppm, 1000 ppm, and 1500 ppm conducted at a temperature of 70 °C. The rheology test of the polymer included concentration vs temperature and shear rate vs viscosity. Thermal stability testing of polymer for 7, 14, 30, 60, and 90 days at 70 °C was done to determine the stability of the polymer solution. Filtration testing was conducted with the criteria of FR <1.2. The static adsorption test has been done with the standard limit of adsorption value <400 µg / gr. Polymer injectivity test using 3 variations of injection rates and coreflooding test were conducted to determine the reduction of Sor in reservoirs due to polymer displacement. From the polymer testing stage, it was found that HPAM polymers at 3 concentrations were compatible with the injection. This is indicated with the clear solution for 3 concentrations at room temperature and 70 °C. The rheology test results showed that the polymer solution with 3 concentrations was decreased in viscosity with the addition of the shear rate value. In the thermal stability test, the viscosity value of the HPAM with 500 ppm was relatively constant. The value of the FR for HPAM 500 ppm is 1.1, HPAM 1000 ppm is 1.07 and HPAM 1500 ppm is 1.03. The results of the static adsorption test showed the lowest HPAM value of 500 ppm was 156 µg/gr. In the injectivity test results, the resistance residual factor (RRF) values at injection rates of 0.3, 0.6, and 1 cc/min were 0.8, 1.04, and 1.12. The RRF value was close to 1, indicating that after injection of 500 ppm of HPAM tended to not experience plugging. Polymer flooding shows the oil recovery factor (RF) of water injection is 39% OOIP, and RF after polymer injection with 0.35 PV with flush water is 13.5% OOIP or 22% Sor. Knowing the behavior of HPAM polymer with various concentrations to be used for chemical EOR injection, it could provide advantages for future implementation in the light oil reservoir in Indonesia.
SURFAKTAN BERBASIS MINYAK SAWIT UNTUK APLIKASI EOR PADA LAPANGAN MINYAK INTERMEDIET Hestuti Eni; Komar Sutriah; Sri Muljani
Lembaran Publikasi Minyak dan Gas Bumi Vol. 51 No. 1 (2017): LPMGB
Publisher : BBPMGB LEMIGAS

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Abstract

Peningkatan produksi minyak tahap lanjut (EOR) perlu dilakukan pada lapangan minyak tua dengan kandungan minyak masih tinggi. Injeksi kimia, khususnya surfaktan sebagai bagian dari aplikasi EOR sudah terbukti mampu meningkatkan perolehan minyak dari lapangan minyak tua. Dewasa ini surfaktan berbasis minyak sawit mulai dikembangkan. Selain surfaktan ini mampu menurunkan tegangan antarmuka sebagaimana yang dipersyaratkan surfaktan sebagai chemical EOR, ketersediaan minyak sawit yang melimpah dan merupakan bahan baku yang terbarukan juga menjadi alasan mengapa dilakukan penelitian sintesa surfaktan berbasis minyak sawit untuk aplikasi EOR ini. Beberapa surfaktan berbasis minyak sawit disintesa, yaitu surfaktan MES, BES dan PDS. Ada tiga varian surfaktan PDS yaitu PDSH1, PDSH2 dan PDSH3. Parameter uji screening seperti kompatibilitas, tegangan antarmuka (IFT), ¿ ltrasi, dan ketahanan panas dilakukan sebelum diaplikasikan pada lapangan minyak intermediet. Dari kelima varian surfaktan, didapatkan formula terbaik 1% surfaktan PDSH3 yang memenuhi kriteria pada uji screening. Karakterisasi FTIR dan analisa gravimetri thermal dilakukan untuk menentukan gugus fungsi sulfonat dan mengukur degradasi perubahan massa surfaktan terhadap panas. Uji injeksi kimia skala laboratorium dilakukan untuk mengetahui seberapa besar peningkatan perolehan minyak yang dihasilkan.
Co-Authors Bayu D Prasetiyo Dadan DSM Saputra Ghifahri Damara Komar Sutriah Letty Brioletty Maman Djumantara Ratu Atikah Balqis Rini Setiati Sri Muljani Sugihardjo Yan Irawan Yani Faozani Alli Yudha Taufantri Yusuf D Rendragraha