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All Journal HIGEIA (Journal of Public Health Research and Development) Journal of Geoscience, Engineering, Environment, and Technology JOURNAL OF EARTH ENERGY ENGINEERING International Journal of Engineering, Science and Information Technology

Ira Herawati, Ira

Unknown Affiliation

Author-ID : 616478

Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Social Sciences Transportation

Published : 7 Documents Claim Missing Document

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Articles

Analyzing The Statistics Function For Determination Of Oil Flow Rate Equation in New Productive Zone Herawati, Ira; Rita, Novia; Novrianti, Novrianti; Taufand, Rosalia M
Journal of Geoscience, Engineering, Environment, and Technology Vol 2 No 1 (2017): JGEET Vol 02 No 01 : March (2017)
Publisher : UIR PRESS

Oil rate will be decline at production time in a well. So, we have to produce in another layer who assume have a potential. Before we produce another layer who assumed have a potential, we need to predict oil rate to known how much oil gain. In this field research oil rate prediction in new productive zone was determine following by analogical data and near well references. In this method there is a difference determine of oil rate for each people. Cause of that, in this research using analysis statistical for oil rate predicting in new productive zone based on linear function for Productivity Index (PI) and polynomial function for watercut. Determining equation of linear and polynomial functions for oil rate prediction measuring by production and logging data for each well who assumed productive zone in area X field RMT. Based of statistically analysis for linear function known that coefficient determination (r2) = 0.9964 and polynomial function known that coefficient determination (r2) = 0.9993. This result indicated that we can use both of the functions for oil rate prediction in new productive zone in area X field RMT. After that, based on both of functions calculate oil rate prediction each wells in area X field RMT. So, known differences in oil rate prediction between oil rate data in area X field Y known is 28.13 BOPD or 0.78%.

Analysis of Petroleum Downstream Industry Potential in Riau Province Erfando, Tomi; Herawati, Ira
Journal of Geoscience, Engineering, Environment, and Technology Vol 2 No 2 (2017): JGEET Vol 02 No 02 : June (2017)
Publisher : UIR PRESS

Petroleum downstream industry in Riau Province is still not optimal. The data shows that from 98,892,755 barrels lifting oil each year only 62,050,000 barrels could be processed in refinery unit II Dumai operated by PT Pertamina. There is a potential of 35-40% of downstream industry. Indonesian Government through The Ministry of Energy and Mineral Resources declared the construction of a mini refinery to boost oil processing output in the downstream sector. A feasibility study of development plan mini refinery is needed. The study includes production capacity analysis, product analysis, development & operational refinery  analysis and economic analysis. The results obtained by the mini refinery capacity is planned to process crude oil 6000 BOPD with the products produced are gasoline, kerosene, diesel and oil. Investment cost consist of is capital cost US $ 104419784 and operating cost US $ 13766734 each year with net profit earned US $ 12330063/year and rate of return from investment 11.63%

Karakterisasi Heterogenitas Reservoir Lapangan X Dengan Dynamic Lorenz Coefficient Herawati, Ira
JOURNAL OF EARTH ENERGY ENGINEERING Vol 1 No 1 (2012): OCTOBER
Publisher : UIR PRESS

Pada proses injeksi air (secondary recovery) dimana air berfungsi mendorong minyak ke sumur produksi, distribusi air akan dipengaruhi oleh sifat heterogenitas suatu reservoir. Distribusi pendesakan air sulit untuk dideteksi karena air cenderung untuk mengalir di zona-zona yang berpermeabilitas tinggi. Oleh karena itu dalam rangka pengukuran heterogenitas reservoir pada tahap injeksi air, penting untuk mempertimbangkan pengaruh geometri aliran yang disebabkan oleh sifat dinamika batuan. Studi ini bertujuan untuk melakukan karakterisasi heterogenitas reservoir dengan injeksi air di Lapangan X. Proses pengukuran derajat heterogenitas menggunakan metode Lorenz coefficient dinamis (dynamic Lorenz coefficient) yang merupakan pengembangan dari parameter Lorenz coefficient. Sifat dinamis injeksi air yang meliputi geometri aliran injeksi dianalisis dengan menggunakan streamline. Informasi yang didapat dari simulasi streamline berupa laju alir injeksi dan time of flight (TOF) streamline akan menjadi dasar perhitungan volume pori yang tersapu oleh air injeksi. Sehingga nilai flow capacity dan storage capacity (F â F) untuk masing-masing region dapat dihitung. Selanjutnya derajat heterogenitas reservoir dihitung dengan persamaan Lorenz.

Analisis Kinerja Tenaga Pendorong Reservoir dan Perhitungan Water Influx pada Perolehan Minyak Tahap Primer (Studi Kasus Lapangan Falipu) Herawati, Ira
JOURNAL OF EARTH ENERGY ENGINEERING Vol 5 No 2 (2016): OCTOBER
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22549/jeee.v5i2.480

Primary recovery is the stage of oil production by relying on the natural ability of the driving force of the reservoir. Kind of driving force that is water drive reservoir, depletion drive, segregation drive and a combination drive. The pressure drop occurred along its produced oil from the reservoir. Reservoir so that the driving force is the main parameter in maintaining reservoir pressure balance. Through the concept of material balance is the determination of the type of propulsion quifer reservoir and the power that generates driving force parameter analysis capability and aquifer in oil producing naturally. Then do the forecasting production to limit the ability of primary recovery production phase. Combination drive depletion of water drive and the drive is a driving force in the dominant reservoir Falipu Fields with a strongly water aquifer types of drives obtained through material balance equation. Calculations using the method of water influx Havlena & Odeh used as a correction factor for determining the type of propulsion reservoir and aquifer strength. Forecasting production in the Field Falipu generate recovery factor of 41% with a pressure boundary in 2050.

Evaluasi Peningkatan Produksi Pada Formasi Sandstone Sumur #H Dan #P Dengan Perencanaan Stimulasi Pengasaman Matriks (Studi Kasus Lapangan Falih) Herawati, Ira; Novrianti, Novrianti
JOURNAL OF EARTH ENERGY ENGINEERING Vol 4 No 2 (2015): OCTOBER
Publisher : UIR PRESS

Salah satu upaya stimulasi sumur yang dilakukan untuk meningkatkan produktivitas sumur yang mengalami penurunan produksi karena menurunnya permeabilitas akibat kerusakan formasi adalah dengan pengasaman matriks. Pengasaman matriks dapat dilakukan pada formasi sandstone menggunakan fluida stimulasi berbahan dasar asam Hydrofloric (HF) yang dicampur dengan asam Hydrochlorid (HCl). Dalam pelaksanaannya perlu dilakukan perencanaan desain pengasaman matriks serta mengevaluasi hasil sebelum dan sesudah dilakukan stimulasi pengasaman matriks. Penggunaan Asam Hydrofloric pada batuan sandstone karena dapat melarutkan Silikat. Asam Hydrofloric bereaksi dengan Calsium (Ca) dan Mangan (Mg) membentuk endapan. Pencampuran asam Hydrofloric dan Hydrochlorid akan dapat menghilangkan scale karena sementasi sandstone terdiri dari Ca dan Mg. Evaluasi keberhasilan stimulasi dilakukan pada sumur #H dan #P yang didasarkan pada laju produksi harian sumur, productivity index, kurva IPR (Inflow Performance Relationship) Wiggins serta harga permeabilitas sumur. Dari hasil penelitian yang dilakukan pada sumur #H mengalami peningkatan produksi dari 81.125 BOPD menjadi 121.365 BOPD dengan kenaikan harga productivity index dari 0.12 bbl/day/psi menjadi 0.2 bbl/day/psi dan kenaikan harga permeabilitas dari 11.65 mDarcy menjadi 17.79 mDarcy. Hasil pengamatan yang dilakukan pada sumur #P mengalami penurunan produksi dari 40.89 BOPD menjadi 34.94 BOPD dengan penurunan harga productivity index dari 0.10 bbl/day/psi menjadi 0.09 bbl/day/psi dan penurunan harga permeabilitas dari 10.76 mDarcy menjadi 9.42 mDarcy.

Kebutuhan Informasi Pasien Praoperasi Herawati, Ira; Handayani, Fitria; Andriany, Megah
HIGEIA (Journal of Public Health Research and Development) Vol 8 No 2 (2024): April 2024
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/higeia.v8i2.68799

Setiap pasien praoperasi akan mengalami kecemasan. Kecemasan terjadi karena literasi kesehatan yang kurang mengenai penyakit, rencana operasi dan anestesi saat operasi. Tujuan dari penulisan scoping review ini adalah mengetahui informasi yang dibutuhkan pasien preoperasi. Metode yang digunakan dalam scoping review ini adalah dengan mencari artikel yang relevan sesuai dengan keyword. Kriteria inklusi pada scoping review ini adalah partisipan dalam penelitian adalah pasien praoperasi, hasil penelitian menggambarkan informasi yang dibutuhkan pasien praoperasi, penelitian descriptive cross sectional, tahun terbit penelitian dalam rentang waktu 2013-2023 dan penelitian dalam Bahasa Inggris. Hasil dari scoping review ini adalah literasi kesehatan yang kurang dapat berakibat pada konflik keputusan yang akan dialami oleh pasien praoperasi. Informasi yang dibutuhkan pasien praoperasi antara lain penyakit, pemeriksaan yang dibutuhkan, penyebab, pengobatan, komplikasi, risiko tindakan operasi, manfaat, tindakan operasi, masalah yang timbul setelah operasi, lama operasi, perawatan di rumah setelah operasi dan efek operasi pada fungsi tubuh serta kehidupan. Selain itu pasien praoperasi juga membutuhkan informasi mengenai pembiusan antara lain komplikasi anestesi, pilihan anestesi, pilihan obat bius dan pulih setelah anestesi. Anxiety was the most common feeling for preoperative patient. Anxiety occurred due to lack of literacy about disease, surgery plan and anesthesia during surgery. The purpose of this scoping review was to find the information needed by preoperative patients. The method in this scoping review was search the relevant articles according to keywords. The inclusion criteria in this scoping review were the participants are preoperative patients, the results describe the information needed by preoperative patients, cross-sectional descriptive research, the year of publication in the 2013-2023 and in English language. The result of this scoping review was the lack of health literacy can cause conflict of decision for preoperative patients. The information needed by preoperative patients includes disease, examinations, causes, treatment, complications, risks and benefit of the surgery, problems after surgery, surgery duration, home care after surgery and the effects of surgery on body function and life. Preoperative patients also need information about anesthesia, including complications, choice of anesthesia, choice of anesthesia drug and recovery after anesthesia.

Study of the Effect of Post Weld Heat Treatment on the Bending Strength of Weld Joints in SMAW and GMAW Methods in Root Bend Areas and Face Bend on ASTM A106 Grade B Paskel, M. Piere Sam; Ariyon, Muhammad; Fitrianti, Fitrianti; Herawati, Ira; Sebayang, Alexander; Tarigan, Efrata; Idhamkamil, Idhamkamil; Tarigan, Liwat
International Journal of Engineering, Science and Information Technology Vol 5, No 2 (2025)
Publisher : Malikussaleh University, Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52088/ijesty.v5i2.850

This study evaluates the effect of Post Weld Heat Treatment (PWHT) on the bending strength of raw materials and welding joints using SMAW and GMAW welding methods. Tests were conducted on root and face bends to compare bending strength before and after PWHT treatment. The test results show that in the root bend area, the base material without PWHT has a bending strength of 3983.16 MPa, while in SMAW and GMAW welding, the bending strength is 3788.39 MPa and 2695.96 MPa, respectively. After PWHT was applied, the bending strength of the base material increased to 4739.76 MPa, while that of SMAW and GMAW welding increased to 4131.62 MPa and 5193.39 MPa, respectively. In the face bend area, the base material without PWHT showed a bending strength of 3077.70 MPa, with SMAW and GMAW welding producing bending strengths of 2654.28 MPa and 2259.32 MPa, respectively. After PWHT, the bending strength of the base material increased to 3289.05 MPa, while SMAW and GMAW welding recorded 2641.47 MPa and 3498.07 MPa, respectively. This study's results indicate that PWHT significantly improves bending strength, especially in the base material and weld joints in the root bend area.

Co-Authors Alexander Sebayang Fitria Handayani Fitrianti Fitrianti, Fitrianti Idhamkamil, Idhamkamil Megah Andriany Muhammad Ariyon Novia Rita Novrianti Paskel, M. Piere Sam Rosalia M Taufand, Rosalia M Tarigan, Efrata Tarigan, Liwat Tomi Erfando, Tomi

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