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All Journal Journal of Mathematical and Fundamental Sciences Jurnal Perencanaan Pembangunan Scientific Contributions Oil and Gas
Bagus Endar Bachtiar Nurhandoko
Department Of Physics, Faculty Of Mathematics And Natural Sciences, Institut Teknologi Bandung
Agriculture, Biological Sciences & Forestry Astronomy Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Economics, Econometrics & Finance Energy Environmental Science Mathematics Physics Social Sciences

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Pengukuran Parameter Seismik dan Difraksi Sinar-X (XRD) pada Batuan Karbonat Formasi Parigi Jhon Alder; Bagus Endar Bachtiar Nur Handoko
Journal of Mathematical and Fundamental Sciences Vol. 39 No. 1-2 (2007)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Substitusi fluida merupakan bagian dari studi seismik untuk memodelkan dan menghitung berbagai macam skenario substitusi fluida yang memberi petunjuk pada pengamatan respon AVO (Amplitude Variation with Offset) dan data seismik post stack. Substitusi fluida melibatkan persamaan Gassmann yang akan mengestimasi efek fluida terhadap parameter modulus bulk. Prediksi parameter modulus bulk ini dapat dipakai untuk mencari keberadaan hidrokarbon.Eksperimen dilakukan terhadap beberapa sampel core batuan karbonat formasi Parigi di daerah Cirebon. Batuan karbonat yang diprediksi berkategori reef dengan kandungan mineral Calcite yang dominan. Kemudian diukur di dalam laboratorium seismik batuan tekanan tinggi dengan variasi tekanan berupa overburden dan pore pressure. Pengamatan dilakukan saat fluida berupa air disubstitusikan ke dalam batuan serta mengamati efek fluida yang terjadi ketika variasi tekanan diberikan. Pengaruh dari kehadiran fluida ini akan digunakan untuk menjelaskan efek substitusi fluida pada batuan karbonat.Kenaikan atau bertambahnya kecepatan gelombang-P ini berbanding lurus dengan modulus bulk dari fluida pengisi pori, sedangkan kecepatan gelombang-S cenderung menurun dengan kehadiran fluida. Hal ini menyatakan bahwa asumsi Gassmann tidak berlaku untuk batuan karbonat.
Airflow Study of A Closed Room in the Public Spaces and Mass Transportation for Healthy and Safe from The Transmission of Covid19 Bagus Endar Bachtiar Nurhandoko; Rio K. Martha; Kaswandhi Triyoso; Satryo A. Wibowo; Sri Widowati
Jurnal Perencanaan Pembangunan: The Indonesian Journal of Development Planning Vol. 5 No. 1 (2021): April 2021
Publisher : Ministry of National Development Planning Republic of Indonesia/Bappenas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36574/jpp.v5i1.158

Abstract

We present engineering airflow to intercept the transmission of Covid19 in public spaces and public transportations, which relatively fast and simple. This technique is to suppress effectively and as massive as possible the spread of aerosols and droplets contaminated with the COVID-19 virus that is flying in the air by providing a vertical downward flow using fans placed on the ceilings and the use of floors of the certain material so that aerosol and microdroplets will not bounce back up, difficult to roll, and firmly attached to the floor. The numerical airflow simulation shows that positioning the fan on the ceiling of the room will cause the air particle to move faster downward, which will push the microdroplets to fall to the floor more quickly, so that the microdroplets and aerosols will quickly move away from the most risk organs from the transmission, namely the mouth and nose. The contactangle test results on several floor materials always show a value of fewer than 90 degrees. These phenomena cause microdroplets or aerosols that fall to the floor will stick tightly and not easily roll. This phenomenon will cause the room to be more sterile from aerosols and microdroplets that may be contaminated with Covid19. The room will be healthier and safer. This technique can be a solution that is relatively inexpensive and simple to implement on a field scale and is very effective in reducing the radius of the spread of droplets or aerosols in closed spaces, both public spaces and public transportation, such as trains and city buses which are very susceptible to Covid19 transmission.
The Effect of Co2-Brine-Rock Interaction Towards Sand Onset Modeling in Dolomite-Rich Sandstone: A Case Study in Air Benakat Formation, South Sumatera, Indonesia Prasandi Abdul Aziz; Bagus Endar Bachtiar Nurhandoko; Taufan Marhaendrajana; Utjok W.R. Siagian; Tutuka Ariadji
Scientific Contributions Oil and Gas Vol 47 No 3 (2024)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.47.3.1682

Abstract

Carbon Capture Utilization Storage (CCUS) into geological storage (e.g., Enhanced Oil or Gas Recovery) provides a solution to reduce CO2 emissions yet remains a potential operational problem, such as sand problem phenomena in producer well. This study performs several experimental works (i.e., time-lapse dry mass measurements, , X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM) and elastic wave measurements) by using CO2-brine-rock batch experimental setup to observe mineral dissolution, pore structures alteration as well as rock physics alteration due to CO2-brine-rock interactions.This study used an outcrop sample of dolomite-rich sandstone from Air Benakat formation, South Sumatera, Indonesia. Our experimental works observed dolomite dissolution, secondary porosity development as well as rock strength reduction indirectly due to CO2-brine-rock interactions. The results of elastic wave velocity measurements (i.e. P & S waves) were then used to modify a considerable sand onset prediction model. Thus, the modified model demonstrates that considering CO2-brine-rock interactions could help to design better sand management strategy in producer well.
Co-Authors Aziz, Prasandi Abdul Jhon Alder Kaswandhi Triyoso Rio K. Martha Satryo A. Wibowo Sri Widowati Taufan Marhaendrajana Tutuka Ariadji Utjok W.R. Siagian