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All Journal TEKNIK Jurnal Ilmiah MTG Info-Teknik Jurnal Geocelebes JOURNAL OF EARTH ENERGY ENGINEERING JST ( Jurnal Sains Terapan ) JURNAL PENDIDIKAN TAMBUSAI AL-ULUM: JURNAL SAINS DAN TEKNOLOGI Jurnal Teknosains Kodepena (Kodepena Journal of Technoscience) Jurnal Teknosains Kodepena (Kodepena Journal of Technoscience) CITIZEN: Jurnal Ilmiah Mulitidisiplin Indonesia Teknika Al-MIKRAJ: Jurnal studi Islam dan Humaniora Journal Of Human And Education (JAHE) Journal of Comprehensive Science Jurnal Offshore: Oil, Production Facilities, and Renewable Energy Indonesian Research Journal on Education Petrogas : Journal of Energy and Technology
Rohima Sera Afifah
Sekolah Tinggi Teknologi Migas
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PENGOLAHAN DATA GEOLISTRIK DENGAN METODE SCHLUMBERGER Broto, Surdaryo; Sera Afifah, Rohima
TEKNIK Volume 29, Nomor 2, Tahun 2008
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (926.55 KB) | DOI: 10.14710/teknik.v29i2.1939

Abstract

Geophysics is a knowledge that concern about structural and composition in subsurface. Geophysicshas some methods to explore subsurface condition which are: seismic, gravity, geomagnetic,georesistivity, georadar and well logging. Georesistivity is one of geophysics method that focused inresistivity properties in the earth. Georesistivity has some methods which are telluric resistivity,magnetotelluric, electromagnetic, IP (Induced polarization), resistivity. Resistivity can be divided intoHorizontal Profilling (HP) and Vertical Electrical Sounding (VES). Georesistivity is used for shallowinvestigation effectively.
Optimasi Produksi Sumur CBM dengan Radial Jet Drilling (RJD) Afifah, Rohima Sera; Karmila, Karmila; Adhiksana, Arief; Jumardi, Andi
JST (Jurnal Sains Terapan) Vol 6, No 1 (2020): JST (Jurnal Sains Terapan)
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat, Politeknik Negeri Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jst.v6i1.748

Abstract

To produce gas methane from the coal bed methane (CBM) field requires the right completion system that considers the reservoir properties which are encountered. One of technologies that is recommended to produce gas methane in the CBM field is Radial Jet Drilling System (RJD). Two important aspects which are considered to test the feasibility of RJD in the CBM field are the problems that usually show up while drilling and producing. The other aspects are the principle of RJD that considers several special tools like radial jetting and length of radial and the problems that usually present during RJD’s application in conventional field like water blocking, hole positioning and hole cleaning. To see the effectiveness of RJD, a comparison with other completion systems (vertical well) is done through simulation step by using WS field data, precisely at BP formation. CBM field simulation that is produced with vertical well system is sensed by adding wells. Meanwhile the CBM field that is produced by RJD completion is sensed by the number of radial phases and the length of each phase.The results show that RJD can be applied in the CBM well with certain parameters then the RJD effectiveness can be achieved with the minimum number of three phases, where the distance of each phase is 90 degrees and length of each radial phase is 300 until 500 ft.Key words: Completion, CBM, RJD, radial jetting, water blocking, hole cleaning, hole positioning, simulation, WS fieldABSTRAK Untuk memperoleh produksi gas metan pada lapangan CBM maka dibutuhkan sistem komplesi yang tepat dengan tetap mempertimbangkan karakteristik reservoir CBM yang dihadapi.  Salah satu teknologi yang di rekomendasikan untuk memproduksi gas metan pada lapangan CBM adalah Radial Jet Drilling (RJD).Dua aspek penting yang dipertimbangkan untuk menguji kelaikan RJD pada lapangan CBM ialah masalah yang biasa muncul pada saat pemboran dan pada saat proses produksi. Aspek berikutnya adalah prinsip kerja RJD yang mempertimbangkan beberapa alat khusus seperti radial jetting dan panjang radial, serta masalah yang biasa muncul seiring dengan aplikasi RJD pada lapangan konvensional seperti water blocking, hole position dan hole cleaning.Sementara untuk melihat keefektifan RJD maka dilakukan perbandingan dengan sistem komplesi lain (sumur vertical) melalui tahap simulasi dengan menggunakan data lapangan WS tepatnya pada formasi BP. Simulasi lapangan CBM yang diproduksi dengan sistem sumur vertikal di sensitivitas dengan menambahkan sumur. Sedangkan lapangan CBM yang diproduksi dengan sistem komplesi RJD di sensitivitas terhadap jumlah fase radial dan panjang masing-masing fase.Hasil pengujian menunjukkan bahwa RJD dapat diaplikasikan pada sumur CBM dengan parameter tertentu sedangkan efektifitas RJD dapat dicapai pada jumlah fase minumum 3 (tiga), dengan jarak antara fase 90o dan dengan panjang radial masing-masing fase 300 ft – 500 ft.Kata kunci : Komplesi, CBM, RJD, radial jetting, water blocking, hole cleaning, hole position, simulasi, WS.
PEMETAAN GEOLOGI DAERAH SEMARANG DAN SEKITARNYA, KECAMATAN GAJAHMUNGKUR, SAMPANGAN, KOTAMADYA SEMARANG, PROVINSI JAWA TENGAH Rohima Sera Afifah
Jurnal Ilmiah MTG Vol 4, No 2 (2011)
Publisher : Jurusan Teknik Geologi Fakultas Teknologi Mineral UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (9.277 KB)

Abstract

Geologi merupakan suatu ilmu yang mempelajari tentang bumi, sehingga dalam penerapan secara langsung di lapangan, yang tercakup dalam konsep pemetaan. Pemetaan Geologi di daerah Semarang dan sekitarnya, Kecamatan Gajahmungkur, Sampangan, Kotamdya Semarang, Provinsi Jawa Tengah. Administrasi daerah pemetaan pada Peta Topografi nomor lembar peta 47/XL-c(74-c) dan 47/XL-d(74-d) skala 1:25.000. Luas kurang lebih 25 km2, meliputi wilayah Jatingaleh, Tinjomoyo, Bendan Duwur-Ngisor, Sampangan,Petompon, Simongan, Genuk, Gajahmungkur, Karangpanas, Kaliwiru, Kagok, Tegalsari, Wonotingal. Bentuk morfologi Kota Semarang merupakan dataran rendah dan perbukitan yang memiliki ketinggian beragam, yaitu antara 0,75 – 348 m di atas permukaan laut, dengan topografi terdiri atas daerah pantai/pesisir, dataran dan perbukitan dengan kemiringan lahan berkisar 0% – 45%, dengan sebagian besar memiliki struktur geologi berupa batuan beku. Metode analisis yang digunakan dalam pemetaan ini adalah metode analisis geomorfologi, analisis petrologi, analisis struktur geologi, dan analisis gerakan tanah. Geomorfologi daerah pemetaan dibagi menjadi 4 satuan bentuklahan, yaitu: Satuan Bentuklahan Struktural Perbukitan Terjal (S1), Satuan Bentuklahan Denudasional Perbukitan Landai (D1), Satuan Bentuklahan Struktural - Denudasional Perbukitan Terjal (S8), Satuan Bentuklahan Fluvial Dataran Sungai Dan Tubuh Sungai (F1 dan F3). Urutan stratigrafi daerah pemetaan dari yang tua sampai yang muda adalah: Satuan endapan material lepas sungai pada Formasi alluvium paling muda, satuan breksi vulkanik Formasi Kaligetas, satuan batupasir Formasi Damar, satuan batupasir karbonatan Formasi Kalibeng, satuan batupasir karbonatan – batulempung karbonatan Formasi Kerek. Struktur Geologi daerah pemetaan adalah Struktur Kekar, Reverse Fault, dan Sesar Turun. Sejarah Geologi daerah pemetaan dimulai dari Miosen Tengah-Holosen. Pada Kala itu terjadi pengendapan seperti di urutan stratigrafi daerah pemetaan dan diikuti dengan terjadinya pengangkatan yang diikuti terbentuknya Reverse Fault, kemudian diikuti terbentuknya Sesar Turun dan Kekar. Potensi daerah pemetaan berupa potensi bahan galian batupasir yang umumnya digunakan bahan bangunan. Sedangkan bencana geologi daerah pemetaan berupa Gerakan Tanah Jenis gerakan longsoran termasuk jenis gelinciran (slides).Kata kunci : Geomorfologi, Bentuklahan, Stratigrafi, Struktur Geologi
KAJIAN MATERIAL SEDIMEN PANTAI BALIKPAPAN UNTUK MENGETAHUI VARIASI UKURAN BUTIR PARTIKEL PASIR (SAND) SEDIMEN Rohima Sera Afifah; Karmila Karmila; Nuruddin Kafy El-Ridlo
INFO-TEKNIK Vol 22, No 2 (2021): INFOTEKNIK VOL. 22 NO. 2 DESEMBER 2021
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v22i2.12391

Abstract

Along the Balikpapan Beach, there are abundant sand-sized sediment particles. Sand is one of the unconsolidated sediment grains based on fractions on the Wentworth Scale. Unconsolidated Sediment is defined as Loose Material and/or sedimentary rocks that is not yet solid. Balikpapan Beach, based on the Regional Geological Map of Balikpapan sheet, formed the Alluvium Formation (abbreviated as Qa) of the Holocene Epoch, Quaternary. Alluvium formation (Qa) has an arrangement of rocks in the form of pebbles, gravel, sand, and clay. Samples of Unconsolidated Sediment or loose material and sedimentary rocks that is not yet solid are determined for grain size variations using the Sieving method. The Seiving method or Sieve Test is a method for determining the size of the grains which will then be viewed on a scale and followed by the amount of grain size data that will be presented in graphical form to facilitate the type of grain size that dominates. The research focused on how the grain size on Balikpapan Beach based on the Wentworth Scale and Sorting data after the Sieve Test. Sieve Test results measured Mesh#10, Mesh#20, Mesh#40, Mesh#60, Mesh#120, Mesh#200 and Filter Analysis of the relationship between Filter Diameter and Retained Percentage as follows: Granule by 3.53%, Sand (Very Coarse Sand by 3.53%, Coarse Sand by 4.75%, Medium Sand by 13.26%, Fine Sand by 66.26%, Very Fine Sand by 5.15%) and Coarse Silt by 3.35%. Therefore, particles in the area of research with the Sieve Test were dominated by Fine Sand particles. Fine Sand with grain size 0.125 – 0.25 mm tested with a filter diameter of 0.125 mm got a Retained Weight of 331.29 gr, Retained Weight Precentage of 66.26%.
PEMODELAN BAWAH PERMUKAAN BANTAR KARET, JAWA BARAT MENGGUNAKAN METODE GRAVITASI Jamaluddin Jamaluddin; Maria Maria; Hamriani Ryka; Rohima Sera Afifah
JURNAL GEOCELEBES Vol. 3 No. 2: October 2019
Publisher : Departemen Geofisika, FMIPA - Universitas Hasanuddin, Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/geocelebes.v3i2.6689

Abstract

Gravity method is one of the geophysical methods that is often used to obtain information about the subsurface through differences density of the rocks around it. Gravity anomaly data used in this study is primary data that has been processed data. Data processing is obtained by reducing gravity observation data until complete bouguer anomaly values. The results of the interpretation of the gravity anomaly show that the types of rocks in subsurface of the study area are peridotite, tuff, riolite and basalt. The rock with the highest density is peridotite with a density value of 3.15 gr/cm3. This is due to the intrusion process to forming peridotite and there are two zones boundaries which have very significant density differences.
Hidrogeologi daerah BRG berdasarkan kondisi hidrologi untuk mengetahui prediksi kesetimbangan Airtanah (Groundwater) Rohima Sera Afifah
INFO-TEKNIK Vol 23, No 1 (2022): INFOTEKNIK VOL. 23 NO. 1 JULI 2022
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v23i1.13959

Abstract

The rapid increase in groundwater exploitation in various sectors in Indonesia has caused preparations in the form of concrete steps that must be faced, especially reducing the impacts caused. The BRG area is an area known as an area in Geological Conditions the existence of intrusions that may result in retained groundwater flows and are productively small and even rare and in addition to that also in terms of environmental conditions of areas surrounded by large industries in the amount of very large groundwater use. Groundwater intake activities impacted the drawdown of groundwater levels. This study in cased the Water Balance conditions of the BRG area groundwater. This study employs hydrology variable to determine groundwater balance. Variables of Rainfall (CH in mm/yr), Evapotranspiration (ET in mm/yr), Infiltration (R in mm/yr) and Run Off (RO in mm/yr). Balance of Groundwater is based on a general formula of Capacity (S). Capacity (S) is directly proportional to Rainfall (CH) as Inflow and Total amount of Evapotranspiration (ET), Infiltration (R) and Run Off (RO) as Outflow. The study revealed that the inflow and outflow of water in BRG area are balanced. The results of the Hydrological Variables of the study area are as follows: Rainfall (CH) is of 8302 mm/yr average value, Evapotranspiration (ET) is of 2726,6 mm/yr average value, Infiltration (R) is of 2,02 x 107 mm/yr and Run off (Ro) 1316,3 mm/yr. The result of Groundwater Water balance is a negative value (Inflow < Outflow). Hydrological calculations decreased in each year for the last 4 years the observation data showed the negative values were getting greater, as follows: (a) the first year -4.01 x 107, (b) the second year -5.63 x 107, (c) the third year -3.10 x 107, (d) the fourth year -4.72 x 107.
FALLING HEAD (FH) UNTUK HUBUNGAN SIFAT BATUAN DENGAN KOEFISIEN KELULUSAN AIR DI DAERAH “BRG” SEKITARNYA Rohima Sera Afifah
AL-ULUM: JURNAL SAINS DAN TEKNOLOGI Vol 8, No 1 (2022)
Publisher : Universitas Islam Kalimantan Muhammad Arsyad Al Banjari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/ajst.v8i1.8918

Abstract

The basalt of "Ohi" Mount and the Andesite Hornblend on "Ser" Mount are a barrier to the flow of groundwater from "Ifa" Mount. Both are an influence on the productivity aquifer. The characteristic of lithology in water is an influence of the permeability coefficient. Falling head is one of the methods of measuring the determination of coefficient permeability. Based on the location measurement, To know the units of rock formed, (2) To know the Productivity aquifer system (local, medium and small); (3) To know the coefficient permeability of characteristics of lithology. Coefficient of Permeability A stream is said to be good if the nature of the rock type has a positive result or the greater the water pass rate, and conversely, the passing value of a negative result has a very small water pass rate. Its goal was to determine the relationship between lithology characteristics and permeability coefficients in the "BRG" area and surroundings. The "BRG" area and its surroundings, based on the location point of measurement of the rock unit, were the Breccia Andesite Hornblend unit, The Medium Productivity Aquifer Dominated. The average coefficient of permeability (K) is 63,300 cm/day. The five location measurements were: 1 st area DS, S1, 2 nd DS area, S2, 3 rd DN area, 4 th DD area, and 5 th DR. The aquifer of the five locations had through fracture permeability and had a type of steep hill morphology
MEMPREDIKSI KEADAAN SUMUR DIMASA DEPAN DENGAN MELAKUKAN OPTIMASI MENGGUNAKAN ELECTRICAL SUBMERSIBLE PUMP PADA SUMUR “AD-96” Muhammad Adnan; Rohima Sera Afifah; Yudiaryono Yudiaryono
PETROGAS: Journal of Energy and Technology Vol 3, No 1 (2021): March
Publisher : Sekolah Tinggi Teknologi MIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58267/petrogas.v3i1.47

Abstract

The production capacity of an oil and gas well is a benchmark in planning production equipment and increases the flow rate of production. In order to increase the rate of oil production, optimization is done optimally using ESP and it is predicted that the production time will be several years ahead. The method used in the well "AD-96" is the Wiggins Method 3 Phase IPR curve to increase the optimal production flow rate by continuing to predict IPR Future through a gradual decrease in reservoir pressure (Pr) scenario. IPR Future in this case provides a development to know the wells in the future. The results of the calculation of Wiggins IPR curve on the well "AD-96" obtained a maximum production rate (Qmax) of 2469 bfpd. To estimate the optimal production rate obtained from a percentage of 80% x maximum flow rate of 1975 bpd, the well is advised to use the Electrical Submersible Pump design with the ESP REDA type pump type DN1800 Pump Performance Curve 60 Hz, 3500 rpm and a Horse Power of 29 HP. , efficiency 76% and IPR Future with water cut of 80% each carried out in the calculation of 4 scenarios at 2000 psia reservoir pressure, obtained a target production flow rate (Qtarget) of 1326 bpd. It is known that the recommended production (recommended production) is between 1200-2400 bpd. Based on the IPR Future scenario, the result shows that ESP does not work at a pressure of 2000 psia.
ANALISIS JENIS FLUIDA RESERVOIR BERDASARKAN NILAI SW DAN LOG SUMUR DS-19, CS-21, RS-23 FORMASI AIR BENAKAT CEKUNGAN SUMATERA SELATAN Dicky Setiawan Sirait; Rohima Sera Afifah; Karmila Karmila
PETROGAS: Journal of Energy and Technology Vol 5, No 1 (2023): March
Publisher : Sekolah Tinggi Teknologi MIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58267/petrogas.v4i1.92

Abstract

Hydrocarbon exploration currently has a variety of methods in operation to determine and identify a reservoir according to the required parameters. Well log data plays an important role in the development of hydrocarbon exploration. Hydrocarbon saturation can be known by first calculating the water saturation, so the value of Sw is the key to work to determine the type of reservoir and its fluid content at an interval or reservoir zone accompanied by crossover and separation readings on the density & neutron log curve. The research was conducted in the Jambi Sub-basin area, ANONIM field, South Sumatra, DS-19, CS-21, RS-23 wells with shaly sand lithology which produces three productive zones. Based on the results, wells DS-19, CS-21, RS-23 has a gaseous hydrocarbon fluid with Sw value in the DS-19 well of 10.5%, CS-21 well of 27.1%, and RS-23 well of 22.4%.
Analisa injeksi Surfaktan+KCL untuk meningkatkan perolehan produksi minyak pada formasi AB-2b di formasi air benakat Firdaus Firdaus; Rohima Sera Afifah
PETROGAS: Journal of Energy and Technology Vol 4, No 2 (2022): October
Publisher : Sekolah Tinggi Teknologi MIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58267/petrogas.v4i2.126

Abstract

This research is a study of surfactant injection to increase oil production in layer AB-2B Meruap field managed by BWP MERUAP. Meruap field has decreased oil production. To increase production, one way to do this is by doing Enhanced Oil Recovery (EOR) so that oil production in the AB-2B layer increases. EOR is an advanced drainage from the reservoir. Surfactants and KCl as injection fluid in this layer are selected based on the results of laboratory data that have been carried out on the AB2B layer Meruap field. surfactant injection is used to reduce the fluid oil interface tension, where oil is trapped by capillary pressure and cannot move, so that the trapped oil can be removed by injecting the surfactant. Mixing surfactant with oil to form an emulsion that will reduce capillary pressure. The results obtained in the AB-2B Meruap field after surfactant injection was carried out was increased oil production
Co-Authors Abdul Gafar Karim Amang, Reza Saputra Amiruddin Amiruddin Amiruddin Amiruddin Amiruddin Ammiruddin, Ammiruddin Andi Jumardi Andi Jumardi Arief Adhiksana Arintalofa, Vithya Battu, Desianto Payung Belo, Janet Jalisar Charles Pangaribuan Darmiyati, Iin Della Endangtri Deny Fatryanto Deny Fatryanto Edyzoh Eko Widodo Dharma Arung Laby Diba, Affikah Fara Dicky Setiawan Sirait Dimas Putra Wibowo El Ridlo, Nuruddin Kafy Fatma Fatma Finansa , Dody Firdaus Firdaus Firdaus Firdaus Firdaus Fitri Oktafiani Halim , Andry Hamriani Ryka Herry Setiawan Ikhsan Adevita Irma Andrianti Jamaluddin Jamaluddin karmila karmila Karmila Karmila Karmila Karmila Kurmaselia, Aprilino Alfa Kurniawan, Teddy Kurniawan, Yudha Dwi Laby, Dharma Arung Lalu, Lalu Artila Igha Anggara Lumbaa, Markus Luthfiyah Atisa Fadhilah M. Nur Mukmin M. Rizal Faahrun Manik, Nijosiho Manik, Nijusiho Maria Maria Martinus Leo Andani Mirza Mirza Mohammad Lutfi Mohammad Luthfi Muhammad Adnan Muhammad Aldi, Muhammad Mukmin, M Nur Mukmin, M. Nur Mukmin, Muhammad Nur Mustagina, Amanda Nijusiho Manik Nur, Dennis Ramdhan Nuruddin Kafy El-Ridlo Nurul Awaliyah Paindan, Esterina Natalia Pasarrin, Yonatan Rumpang Patanduk, Beth Alfine Prada, Charlis Andika Pratama Bagus Restu.S Purba, Chris Leonardi R.Bambang Wicaksono Rachmasari Pramita Wardhani Rahman, Khairul Rahman, Muhammad Safa Rahmawati , Selvy Dwi Ramadhan, Muhammad Fauzi Randanan, Eltimeyansi Chrisye Randanan, Eltimeyansi Crisye Rante, Wandi Allo Refiyanto, Andra Agustin Restu, Pratama Bagus Risna Risna Risna Risna, Risna Rizky Kurniawan Rohani, Adelia Rombe, Ripal RR. Ella Evrita Hestiandari Ryka, Hamriani Sahara, Ain Sayen Girsang Sulardi . Suprayitno, Abdi Surdaryo Broto Susilo, Arya Cahya Susilo, Dedy Syaifa Luttha Hanora Teddy Kurniawan Tryana, Aris Luqman Tryna, Aris Luqman Ulfah, Baiq Maulinda Ummul Haq Vely Remitha Viola Sri Wahyuni Wahyu, Rafi Waskita, Kukuh Jalu Widodo, Deny Fatryanto Edyzoh Eko Widodo, Pria Agung Willard, Karnila Yohanes, Yandri Yudiaryono Yudiaryono Yuniarti , Yuniarti Yuniarti Yuniarti Zavta Rizki