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Rohima Sera Afifah
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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
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.
Perencanaan Volume Injeksi CO2 Dan Tekanan Injeksi CO2 Dengan Pola Injeksi ¼ Dari 5 Spot Pada Kegiatan CO2 Flooding-Enhanced Oil Recovery (CO2EOR) Di Sumur "TRK-15" Lapangan "KLMT" Refiyanto, Andra Agustin; Risna, Risna; Afifah, Rohima Sera
JST (Jurnal Sains Terapan) Vol 9, No 1 (2023): 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.v9i1.1740

Abstract

The "TRK-15" well in the “KLMT” field is classified as an old well located in Jambi Province. This study focuses on calculating CO2 injection volume and CO2 injection pressure using 4 injection rate parameters by applying the CO2 flooding design method. The research method used is the CO2 flooding-enhanced oil recovery method. CO2 flooding design calculations focus on the amount of CO2 injected and CO2 injection pressure with 4 injection rate parameters (qi) starting from 5 Mscfd, 10 Mscfd, 15 Mscfd, 20 Mscfd. Based on the research results based on 4 injection rate parameters (qi), for an injection rate (qi) of 5 Mscfd, the CO2 front time (tCO2) = 50.03 hours and the amount of CO2 needed for injection (VCO2) = 3,481,790.4 scf. For the injection rate parameter (qi) of 10 Mscfd, the CO2 front time (tCO2) = 25.01 hours and the amount of CO2 required for injection (VCO2) = 1,742,136.48 scf. For the injection rate parameter (qi) 15 Mscfd, the CO2 front time (tCO2) = 16.67 hours and the amount of CO2 required for injection (VCO2) = 1,162,458.72 scf. For the injection rate parameter (qi) 20 Mscfd, the CO2 front time (tCO2) = 12.51 hours and the amount of CO2 required for injection (VCO2) = 871,999.2 scf. For the injection rate parameter (qi) 5 Mscfd, CO2 tubing injection pressure (Ptf) = 227.95 psi, for the injection rate parameter (qi) 10 Mscfd obtained (Ptf) = 903.43 psi, for the injection rate parameter (qi) 15 Mscfd obtained (Ptf) = 2,025.51 psi, for the injection rate parameter (qi) 20 Mscfd obtained (Ptf) = 3,594.03 psi. Keywords : CO2 Flooding, Enhanced Oil Recovery, Production Flow Rate
Geologi Untuk Mengetahui Satuan dan Sebaran Jenis Litologi Endapan Material Lepas Sungai Daerah Sungai “KLG” Afifah, Rohima Sera
INFO-TEKNIK Vol 24, No 2 (2023): INFOTEKNIK VOL. 24 NO. 2 DESEMBER 2023
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v24i2.17741

Abstract

The Alluvium Formation of the Upper Fluvial "KLG" area is a fluvial alluvial deposit in the form of pebbles - granule of andesite and basalt grain size. The lithology unit is a Fluvial Alluvial that includes the Fluvial Plain and Fluvial Body. The diversity of grain sizes is due to the influence of the Sedimentological process. The sedimentological process begins with the rocks being and or being uplifted to the surface undergoing weathering, transport time / transport distance, resistance and crystal shape. The type of fluvial sediment material is divided into 2 (two) parts, namely: 1) the upstream part of the fluvial, generally in the form of coarse-sized alluvial deposits including the size of boulders, pebbles, granule, and sand, 2) the downstream part of the fluvial, generally in the form of finer-sized deposits. The research focused on geological studies with a lithological unit approach to the Upper Fluvial "KLG" area. The research aimed to determine the lithological unit of the Upper Fluvial "KLG" area and the distribution of grain size of unconsolidated sediment in the Upper Fluvial "KLG" of study area. The research method was carried out with 3 (three) methods, namely: a) Descriptive Method, by means of literature study, b) Survey Method, by means of factual information in the research area, with the stages of Field Observation including: Observation of geological appearances including outcrops, recording, sampling and recording field data in the Upper Fluvial "KLG", c) Analysis Methods include: Petrology and Sieve Analysis. Research results showed that The Geomorpholgy was Fluvial Alluvial plain. The Formation area was Alluvial Formation with unconsolidated sediment fluvial lithology. The grain sizes of Unconsolidated sediment were boulders, pebbles, granule and sand. Keywords: Alluvial Formation, Fluvial, Unconsolidated Sediment
EVALUASI KEEKONOMIAN KERJA ULANG PINDAH LAPISAN DENGAN METODE PERFORASI SUMUR PRODUKSI Susilo, Arya Cahya; Afifah, Rohima Sera; Randanan, Eltimeyansi Chrisye; Willard, Karnila; Sulardi, Sulardi
INFO-TEKNIK Vol 21, No 2 (2020): INFOTEKNIK VOL. 21 NO. 2 DESEMBER 2020
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v21i2.10052

Abstract

The problem is that there is no certainty about the production capacity of the wells before evaluating the performance of production wells. The research objective was to describe the condition of oil and gas reserves in production wells and an economic picture of the MBR production resources after the recovery period by moving layers using the perforation method. This study used a used research method with a case study approach, namely the case that occurred in the MBR production well of PT. Medco E&P Tarakan operation area. The results of the evaluation of production capacity after displacement recovery based on the analysis of logging data at a depth of 850 MZ, it is known that the initial oil reserves (OOIP) are 284,304 STB with a recovery factor of 25%. The results of the calculation of the economic indicator for the proposed perforation of work to move layers, the total value of NPV. 15% was obtained in the eighth month in total lifting of 28,466, namely USD 123.561, the payout time for this work was 1.8 months with an IRR of 340% indicating that investment has the potential to provide benefits.
PONDASI BALIK KOTAK DITANAH LUNAK Sulardi, Sulardi; Widodo, Pria Agung; Suprayitno, Abdi; Ryka, Hamriani; Afifah, Rohima Sera; Waskita, Kukuh Jalu
INFO-TEKNIK Vol 21, No 2 (2020): INFOTEKNIK VOL. 21 NO. 2 DESEMBER 2020
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v21i2.10051

Abstract

The problem is the difficulty in determining the type and method of manufacture and installation of foundation on soft soils. The research objective is to provide an overview of the type of foundation, the method of manufacture and the method of installation of the foundation which is suitable and suitable in the soft soil environment. This research method uses used research methods with trial and error, and with a case study approach method, namely the case of difficulties in overcoming the problem of the availability of permanent structural support foundations and refinery operation equipment on soft soil. The results showed that the type and shape of the foundation that is suitable and to solve the problem is the foundation behind the box. This foundation specification is an inverted box with reinforced concrete material and certain dimensions with cover plates. The results of this used research also show that the inverted box type of foundation is suitable for supporting equipment supporting refinery operations such as pipe supports and other refinery operation equipment.
STUDI LUMPUR PEMBORAN MENGGUNAKAN CANGKANG TELUR UNTUK MENGETAHUI RHEOLOGY LUMPUR PEMBORAN PADA TRAYEK 8-1/2´´ HOLE UJI LABORATORIUM Rante, Wandi Allo; Afifah, Rohima Sera; Kurmaselia, Aprilino Alfa; El Ridlo, Nuruddin Kafy
PETROGAS: Journal of Energy and Technology Vol 6, No 1 (2024): MARCH
Publisher : Sekolah Tinggi Teknologi MIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58267/petrogas.v6i1.165

Abstract

This study examines the use of water-based mud (WBM) in well drilling. It specifically focuses on enhancing the rheology of WBM that meets API 13A specifications by incorporating calcium carbonate (CaCO3) at concentrations of 2.5% and 7.5%. The primary objective is to compare the original rheology of the WBM adhering to API 13A standards with the modifications following the addition of CaCO3. The methodology employed includes laboratory tests to gather data, testing mixtures of the original mud with added CaCO3, and evaluating the impact on mud properties such as viscosity and density. The results are expected to determine the optimal additive concentration to improve mud performance in drilling operations.
STUDI LABORATORIUM ANALISIS PENGARUH PENAMBAHAN FRACSEAL DAN KALSIUM KARBONAT (CACO3) UNTUK MENGATASI LOST CIRCULATION TERHADAP LUMPUR PEMBORAN Pasarrin, Yonatan Rumpang; Amiruddin, Amiruddin; Ulfah, Baiq Maulinda; Laby, Dharma Arung; Afifah, Rohima Sera
PETROGAS: Journal of Energy and Technology Vol 6, No 1 (2024): MARCH
Publisher : Sekolah Tinggi Teknologi MIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58267/petrogas.v6i1.163

Abstract

Lumpur Pemboran merupakan salah satu sarana yang penting dalam operasi pemboransumur-sumur minyak dan gas bumi. Pada proses pemboran berlangsung biasanya terdapat berbagai kendala, salah satunya adalah terjadinya Lost Circulation. Lost Circulation adalah hilangnya sebagian atau seluruh fluida pemboran saat sirkulasi sedang berlangsung. Lost circulation terjadi karena rekahan pada dinding pemboran baik rekahan yang terjadi secara alami atau secondary. LCM (Lost Circulation Material) adalah suatu metode yang digunakan untuk menanggulangi Lost Circulation dengan menambahkan sejumlah material pemberat kedalam lumpur pemboran ataupun dengan cara memompakan sejumlah material pemberat kedalam formasi lost. LCM yang digunakan pada penelitian ini adalah Fracseal dan CaCO3. Cara Kerja dari CaCO3 dan Fracseal ini terhadap lost circulation adalah dengan cara menutup pori pori atau zona rekahan formasi sehingga fluida tidak masuk kedalam formasi. Pada penelitian ini, pengaruh LCM terhadap filtrat lumpur pemboran mengalami penurunan jumlah filtrat yang hilang, pada pengujian 3% LCM mengalami penurunan filtrat dari 7 ml/ 30 menit menjadi 5 ml/ 30 menit, dan untuk 5% LCM mengalami penurunan menjadi 4,6 ml/ 30 menit. 
Struktur Sedimen daerah Sungai “KLG” untuk Identifikasi Lingkungan Pengendapan Satuan Batupasir Karbonatan Afifah, Rohima Sera
Teknika Vol. 19 No. 2 (2024): Oktober
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/teknika.v19i2.8855

Abstract

Struktur sedimen merupakan salah satu data penting dalam penentuan lingkungan pengendapan. Pembentukan struktur sedimen dipengaruhi oleh proses sedimentasi baik sebelum, selama dan sesudah. Proses- proses disebabkan antara lain oleh proses fisika, kimia, biogenik, transportasi oleh agen erosi, arus fluida dan aliran massa. Penelitian bertujuan untuk mengetahui klasifikasi berdasarkan proses terbentuknya struktur sedimen dan melakukan interpretasi Lingkungan Pengendapan. Penelitian berfokus pada Satuan Batuan Batupasir Karbonatan untuk mengetahui lingkungan pengendapan dengan beberapa metode, yakni: metode deskritif, mengkaji hasil satuan batuan hasil pemetaan geologi permukaan, metode analisis struktur sedimen untuk penentuan klasifikasi proses pembentukan dan media transportasi, metode analisis fosil untuk mendapatkan jenis fosil dan lingkungan hidup. Hasil Penelitian, menunjukkan struktur sedimen di daerah penelitian berupa Flute Cast dan Groove Cast. Struktur sedimen terbentuk akibat proses erosi aliran fluida dan aliran sedimen sebelum pengendapan diatas bidang lapisan. Klasifikasi kedua struktur sedimen tersebut berupa Pre-Depositional dan atau dikenal dengan struktur erosi. Lingkungan pengendapan daerah penelitian berdasarkan keterdapatan fosil yang ditemukan adalah jenis Fosil Gastropoda. Maka, Lingkungan Pengendapan daerah penelitian adalah Laut Dangkal.
Co-Authors Abdul Gafar Karim Adhiksana, Arief Amiruddin Amiruddin Amiruddin Andi Jumardi Andi Jumardi Arintalofa, Vithya Battu, Desianto Payung Belo, Janet Jalisar Darmiyati, Iin Della Endangtri Deny Fatryanto Edyzoh Eko Widodo Dharma Arung Laby Dimas Putra Wibowo El Ridlo, Nuruddin Kafy Fatma Fatma Firdaus Firdaus Firdaus Halim , Andry Hamriani Ryka Herry Setiawan Irma Andrianti Jamaluddin Jamaluddin Jumardi, Andi karmila karmila Kurmaselia, Aprilino Alfa Kurniawan, Teddy Laby, Dharma Arung Luthfiyah Atisa Fadhilah M. Nur Mukmin M. Rizal Faahrun Manik, Nijosiho Maria Maria Mirza Mirza Mohammad Lutfi Mohammad Luthfi Muhammad Aldi, Muhammad Mustagina, Amanda Nijusiho Manik Nur, Dennis Ramdhan Pasarrin, Yonatan Rumpang Patanduk, Beth Alfine Prada, Charlis Andika Pratama Bagus Restu.S R.Bambang Wicaksono Rahman, Muhammad Safa Ramadhan, Muhammad Fauzi Randanan, Eltimeyansi Chrisye Rante, Wandi Allo Refiyanto, Andra Agustin Restu, Pratama Bagus Risna Risna, Risna RR. Ella Evrita Hestiandari Ryka, Hamriani Sulardi . Suprayitno, Abdi Susilo, Arya Cahya Teddy Kurniawan Ulfah, Baiq Maulinda Ummul Haq Vely Remitha Viola Sri Wahyuni Waskita, Kukuh Jalu Widodo, Pria Agung Willard, Karnila Zavta Rizki