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6th ITB International Geothermal Workshop, IIGW 2017

作者： Hidayat, Iki Sutopo Pratama, Heru Berian Study Program of Petroleum Engineering Faculty of Mining and Petroleum Engineering Bandung Institute of Technology Indonesia Study Program of Geothermal Engineering Faculty of Mining and Petroleum Engineering Bandung Institute of Technology Jl. Ganeca No. 10 West java Bandung40132 Indonesia

The Kerinci geothermal field is one phase liquid reservoir system in the Kerinci District, western part of Jambi Province. In this field, there are geothermal prospects that identified by the heat source up flow inside a National Park area. Kerinci field was planned to develop 1×55 MWe by Pertamina Geothermal Energy. To define reservoir characterization, the numerical simulation of Kerinci field is developed by using TOUGH2 software with information from conceptual model. The pressure and temperature profile well data of KRC-B1 are validated with simulation data to reach natural state condition. The result of the validation is suitable matching. Based on natural state simulation, the resource assessment of Kerinci geothermal field is estimated by using Monte Carlo simulation with the result P10-P50-P90 are 49.4 MW, 64.3 MW and 82.4 MW respectively. This paper is the first study of resource assessment that has been estimated successfully in Kerinci Geothermal Field using numerical simulation coupling with Monte carlo simulation. © Published under licence by IOP Publishing Ltd.

关键词： Monte Carlo methods

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Development of unconventional method for mapping the surface hydrothermal alteration in Wayang Windu geothermal field

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AIP Conference Proceedings 2021年第1期2363卷

作者： Syafrizal Arie Naftali Hawu Hede Nurul Magrfirah 1Research Group of Earth Resource Exploration Faculty of Mining and Petroleum Engineering Institute of Technology Bandung Bandung 40132 Indonesia 2Master Program of Mining Engineering Faculty of Mining and Petroleum Engineering Institute of Technology Bandung Bandung 40132 Indonesia

The Wayang Windu geothermal field, a geothermal system zone that produces energy sources located in Pengalengan and Kertasari Districts, Bandung Regency, West Java, Indonesia. The interpretation of surface minerals considers the alterations in volcanic rocks that occur at the research site. The distribution of surface minerals is closely related to the fracture pattern and the position of manifestation. The testing method that we used is the X-Ray diffraction method, which aimed to identify surface minerals. Silica (cristobalite, quartz, tridymite, opal), sulfate (alunite), oxide minerals, and clay minerals (kaolinite, smectite) are minerals that are often found on the surface. Native sulfur is often found in the primary manifestation of the crater. X-Ray Fluorescence is used to determine the main elements and traces in a sample. Andesite and andesite-basaltic-rock are rock types that are found in the research area. The XRF analysis results show that the SiO2 distribution is inversely proportional to the Al2O3, Fe2O3, and K2O distributions.

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Numerical Study of Temperature Profiles of Transient Flow in the Geothermal Oilfield

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IOP Conference Series: Earth and Environmental Science 2021年第1期732卷

作者： J Hendrarsakti M Rahma Faculty of Mechanical and Aerospace Engineering Geothermal Engineering Master's Program Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Jl. Ganesha 10 Bandung 40132 Indonesia

Some petroleum wells that are no longer productive still have heat in their formation rocks. Those heat can be extracted and utilized by injecting working fluid into the wellbore. The current study's objective was to create a 2D numerical calculation program for transient flow temperatures inside the well then it was used to calculate the temperature distribution in oil and gas fields in the Arun field and BK Area. The injected fluids were modeled as a double-pipe heat exchanger. Heat transfer processes inside the wellbore were convection in the inner pipe and the annulus and conduction in the pipe walls and rock formations. The computational calculation used a finite difference method. The computation results were then compared with calculations from the literature. After being validated, the program was used to calculate the Arun field and BK Area temperature distributions. This study found that compared with the reference literature, the current results had a similar optimum temperature range of 130°C-160°C but had different profiles shape with an average deviation of 12%. In the Arun fields, simulation results indicated that the field could reach temperatures between 90°C-120°C and was classified as a medium-temperature geothermal source. BK Area could reach optimum temperatures between 50°C-80°C and be classified as the low-temperature geothermal.

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Cellulose Microcrystalline: A Promising Ecofriendly Approach to Control Culex Quinquefasciatus Larvae

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SSRN 2023年

作者： de Souza, Sindoval Silva Gomes, Alex Rodrigues Batista Guimarães, Abraão Tiago Rodrigues, Aline Sueli de Lima de Matos, Letícia Paiva Mendonça, Juliana dos Santos Luz, Thiarlen Marinho da da Silva Matos, Stênio Gonçalves Safiur, M. Rahman Ragavendran, Chinnasamy Senthil-Nathan, Sengottayan Guru, Ajay Rakib, Md. Refat Jahan Mubarak, Nabisab Mujawar Mostafizur, Md. Rahman Rocha, Thiago Lopes Towfiqul Islam, Abu Reza Md. Malafaia, Guilherme Post-Graduation Program in Biotechnology and Biodiversity Federal University of Goiás GO Goiânia Brazil Laboratory of Toxicology Applied to the Environment Goiano Federal Institute Urutaí Campus. Rodovia Geraldo Silva Nascimento 25 km Zona Rural Urutaí GO Brazil Post-Graduation Program in Ecology Conservation and Biodiversity Federal University of Uberlândia MG Uberlândia Brazil Post-Graduation Program in Conservation of Cerrado Natural Resources Goiano Federal Institute Urutaí GO Brazil Department of Environmental Science and Disaster Management Noakhali Science and Technology University Noakhali3814 Bangladesh Saveetha University Tamil Nadu Chennai India Division of Biopesticides and Environmental Toxicology Sri Paramakalyani Centre for Excellence in Environmental Sciences Manonmaniam Sundaranar University Tirunelveli Tamil Nadu Alwarkurichi627 412 India Department of Cariology Saveetha Dental College and Hospitals SIMATS Tamil Nadu Chennai600 077 India Noakhali Science and Technology University Noakhali Bangladesh Petroleum and Chemical Engineering Faculty of Engineering Universiti Teknologi Brunei Bandar Seri BegawanBE1410 Brunei Jahangirnagar University Dhaka1342 Bangladesh Laboratory of Environmental Biotechnology and Ecotoxicology Institute of Tropical Pathology and Public Health Federal University of Goiás Goiás Goiânia Brazil Department of Disaster Management Begum Rokeya University Rangpur5400 Bangladesh

The growing use of synthetic chemical compounds/substances in vector control of mosquitoes, associated with their adverse effects on the environment and non-target organisms, has demanded the development of eco-friendly alternatives. In this context, this study aimed to evaluate the larvicidal action of different cellulose microcrystalline (CMs) concentrations and investigate their toxicity mechanisms in Culex quinquefasciatus fourth instar larvae as a model species. Probit analysis revealed that the median lethal concentrations (LC50) for 24 h and 36 h exposure were 100 and 58.29 mg/L, respectively. We also showed that such concentrations induced a redox imbalance in the larvae, marked by an increase in the production of reactive oxygen species (ROS) and thiobarbituric acid reactive substances (TBARS), as well as a reduction in the activity of superoxide dismutase (SOD) and catalase (CAT). Furthermore, different alterations in the external morphology of the larvae were associated with the ingestion of CMs. On the other hand, exposure of adult zebrafish (Danio rerio) to LC5024h and LC5036h for seven days did not induce any behavioral changes or alterations mutagenic, genotoxic, biochemical, or in the pro- and anti-inflammatory response. Thus, taken together, our study demonstrates for the first time that the use of CMs can constitute a promising strategy in the control of C. quinquefasciatus larvae, combining insecticidal efficiency with an "eco-friendly" approach in the fight against an important mosquito vector of several human diseases. © 2023, The Authors. All rights reserved.

关键词： Cellulose

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Nuclear magnetic resonance estimation of petrophysical properties and evaluation of hydrocarbon huff-n-puff gas injection in lower eagle Ford shale oil samples

Nuclear magnetic resonance estimation of petrophysical prope...

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SPE/AAPG/SEG Unconventional Resources Technology Conference 2019, URTC 2019

作者： Cudjoe, S. Oraki, I. Barati, R. Tsau, J.-S. Zhang, C. Nicoud, B. Bradford, K. Baldwin, A. Mohrbacher, D. University of Kansas Chemical and Petroleum Engineering Department LawrenceKS United States University of Kansas Tertiary Oil Recovery Program LawrenceKS United States Chesapeake Energy Oklahoma CityOK United States

Shale oil formations are distinguished by the presence of kerogen and generated hydrocarbons (light oil & bitumen) occupying the organic and inorganic pores. This makes petrophysical measurements using conventional techniques very challenging. Moreover, implementing hydrocarbon gas huff-n-puff in shale oil formations as an improved oil recovery (IOR) method, although effective, creates a more complex system, where the underlying in-situ interactions are not fully understood. Nuclear magnetic resonance (NMR) measurements can predict fluid types occupying different pore sizes in a formation. As such, performing gas huff-n-puff in the laboratory on core and at the pilot scale in the formations can benefit from a non-destructive saturation measurement. This measurement can be used for the estimation of incremental oil recovery based on the initial oil-in-place (OIP). This study utilizes low field NMR relaxation measurements correlated with core analysis to estimate porosity, permeability and oil saturation properties of the Lower Eagle Ford (LEF) shale samples in the black-oil window and outline the in-situ rock-fluid interactions during the IOR process. NMR measurements of T2-relaxation and 2D T1-T2 maps are obtained for both outcrop and reservoir core-plugs in "as-received" and "fully-saturated" states, respectively. The outcrop plug is saturated with hexadecane, while the reservoir cores are saturated with produced oil from the Eagle Ford formation at different temperatures (40°C and 125°C) and a pore pressures of 3500 psi. The pressure of 3,500 psi was chosen because it is ~800 psi above the bubble point of the reservoir fluid and provides for a pressure drop to occur for the puff cycle. Saturation measurements are developed for the LEF shale oil core plugs for which the efficiency of the gas huff-n-puff IOR technique is evaluated. On the other hand, subsequent NMR measurements were acquired after conducting hydrocarbon gas huff-n-puff recovery on both the outcrop a

关键词： Nuclear magnetic resonance

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Carbon Nanofibers in Predicted Environmentally Relevant Concentrations Intensify Monocystis Sp. Infection and Affect the Lumbricus Terrestris Earthworms' Health

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SSRN 2023年

作者： Montalvão, Mateus Flores Gomes, Alex Rodrigues Guimarães, Abraão Tiago Batista de Lima Rodrigues, Aline Sueli de Matos, Letícia Paiva dos Santos Mendonça, Juliana da Luz, Thiarlen Marinho da Silva Matos, Stênio Gonçalves Rahman, M. Safiur Ragavendran, Chinnasamy Senthil-Nathan, Sengottayan Guru, Ajay Rakib, Md. Refat Jahan Mubarak, Nabisab Mujawar Rahman, Md. Mostafizur Rocha, Thiago Lopes Towfiqul Islam, Abu Reza Md. Malafaia, Guilherme Post-Graduation Program in Ecology Conservation and Biodiversity Federal University of Uberlândia MG Uberlândia Brazil Laboratory of Toxicology Applied to the Environment Goiano Federal Institute Urutaí Campus. Rodovia Geraldo Silva Nascimento 25 Km Zona Rural GO Urutaí Brazil Post-Graduation Program in Conservation of Cerrado Natural Resources Goiano Federal Institute GO Urutaí Brazil Post-Graduation Program in Biotechnology and Biodiversity Federal University of Goiás GO Goiânia Brazil Bangladesh Atomic Energy Commission Bangladesh Periyar University India Division of Biopesticides and Environmental Toxicology Sri Paramakalyani Centre for Excellence in Environmental Sciences Manonmaniam Sundaranar University Alwarkurichi Tamil Nadu Tirunelveli627 412 India Department of Cariology Saveetha Dental College and Hospitals SIMATS Tamil Nadu Chennai600 077 India Noakhali Science and Technology University Noakhali Bangladesh Petroleum and Chemical Engineering Faculty of Engineering Universiti Teknologi Brunei Bandar Seri Begawan BE1410 Brunei Jahangirnagar University Dhaka1342 Bangladesh Laboratory of Environmental Biotechnology and Ecotoxicology Institute of Tropical Pathology and Public Health Federal University of Goiás Goiás Goiania Brazil Department of Disaster Management Begum Rokeya University Rangpur5400 Bangladesh

Although the ecotoxicity of carbon-based nanomaterials (CBNs) is known, the potential effect of carbon nanofibers (CNFs) on edaphic organisms has not been evaluated. Thus, we aimed at the ecotoxicity of CNFs (at 10 and 100 mg/kg) in Lumbricus terrestris earthworms naturally infected with Monocystis sp. After 28 days of exposure, treatments did not affect the survival rate. However, we observed a significant loss of body biomass, and Monocystis sp. infection in seminal vesicles was potentiated by exposure to CNFs. Earthworms exposed to CNFs showed a redox imbalance in the seminal vesicle, muscle, and intestine and an alteration in nitric oxide production in these organs. In muscles, we also noticed a significant reduction in AChE activity in earthworms exposed to CNFs. The histopathological analyses revealed the treatments' significant effect on the structures of the different evaluated tissues. Although we did not notice a concentration-response for several of the biomarkers, when taken together and after the application of IBRv2 and principal component analysis (PCA), we noticed that the response of earthworms to CNFs at 100 mg/kg showed a more significant deviation from the unexposed group. This was mainly determined by inhibiting antioxidant activity in the seminal vesicle, biochemical biomarkers assessed in muscle and intestine, and histomorphometric muscle biomarkers from earthworms exposed to CNFs at 100 mg/kg. Thus, we demonstrate that CNFs increase the parasite load of Monocystis sp. of adult L. terrestris earthworms and induce biochemical changes and histopathological changes, especially at 100 mg/kg. Our results point to the additional impact these nanomaterials can have on the health of earthworms, signaling the need for greater attention to their disposal and ecotoxicological effects on soil organisms. © 2023, The Authors. All rights reserved.

关键词： Biomarkers

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Carbon Nanofibers in Predicted Environmentally Relevant Concentrations Intensify Monocystis Sp. Infection and Affect the Lumbricus Terrestris Earthworms' Health

SSRN

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SSRN 2023年

作者： Montalvão, Mateus Flores Gomes, Alex Rodrigues Guimarães, Abraão Tiago Batista Rodrigues, Aline Sueli de Lima de Matos, Letícia Paiva Mendonça, Juliana dos Santos da Luz, Thiarlen Marinho da Silva Matos, Stênio Gonçalves Rahman, M. Safiur Ragavendran, Chinnasamy Senthil-Nathan, Sengottayan Guru, Ajay Rakib, Md. Refat Jahan Mubarak, Nabisab Mujawar Rahman, Md. Mostafizur Rocha, Thiago Lopes Islam, Abu Reza Md. Towfiqul Malafaia, Guilherme Post-Graduation Program in Ecology Conservation and Biodiversity Federal University of Uberlândia MG Uberlândia Brazil Laboratory of Toxicology Applied to the Environment Goiano Federal Institute Urutaí Campus. Rodovia Geraldo Silva Nascimento 25 km Zona Rural GO Urutaí Brazil Post-Graduation Program in Conservation of Cerrado Natural Resources Goiano Federal Institute GO Urutaí Brazil Post-Graduation Program in Biotechnology and Biodiversity Federal University of Goiás GO Goiânia Brazil Bangladesh Atomic Energy CommissionBangladesh Bangladesh Periyar University India Division of Biopesticides and Environmental Toxicology Sri Paramakalyani Centre for Excellence in Environmental Sciences Manonmaniam Sundaranar University Tirunelveli Tamil Nadu Alwarkurichi627 412 India Department of Cariology Saveetha Dental College and Hospitals SIMATS Tamil Nadu Chennai600 077 India Noakhali Science and Technology University Noakhali Bangladesh Petroleum and Chemical Engineering Faculty of Engineering Universiti Teknologi Brunei Bandar Seri BegawanBE1410 Brunei Jahangirnagar University Dhaka1342 Bangladesh Laboratory of Environmental Biotechnology and Ecotoxicology Institute of Tropical Pathology and Public Health Federal University of Goiás Goiás Goiania Brazil Department of Disaster Management Begum Rokeya University Rangpur5400 Bangladesh

We aimed at the ecotoxicity of CNFs (at 10 and 100 mg/kg) in Lumbricus terrestris earthworms naturally infected with Monocystis sp. After 28-d of exposure, treatments did not affect the survival rate. However, we observed a significant loss of body biomass, and Monocystis sp. infection in seminal vesicles was potentiated by exposure to CNFs. Earthworms exposed to CNFs showed a redox imbalance in the seminal vesicle, muscle, and intestine and an alteration in nitric oxide production in these organs. In muscles, we also noticed a significant reduction in AChE activity in earthworms exposed to CNFs. The histopathological analyses revealed the treatments' significant effect on the structures of the different evaluated tissues. When taken together and after applying IBRv2 and PCA, we noticed that the response of earthworms to CNFs at 100 mg/kg showed a more significant deviation from the unexposed group. Thus, we demonstrate that CNFs increase the parasite load of Monocystis sp. of adult L. terrestris earthworms and induce biochemical changes and histopathological changes, especially at 100 mg/kg. Our results point to the additional impact these nanomaterials can have on the health of earthworms, signaling the need for greater attention to their disposal and ecotoxicological effects on soil organisms. © 2023, The Authors. All rights reserved.

关键词： Muscle

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Topographic map analysis to determine Arjuno-Welirang volcanostratigraphy and implication for geothermal exploration 6

Topographic map analysis to determine Arjuno-Welirang volcan...

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6th ITB International Geothermal Workshop, IIGW 2017

作者： Apriani, Lestari Satriana, Joshua Chalik, Citra Aulian Mulyana, Reza Syahputra Hafidz, Muhammad Suryantini Magister Program of Geothermal Engineering Faculty of Mining and Petroleum Engineering Bandung Institute of Technology Indonesia

Volcanostratigraphy study is used for supporting geothermal exploration on preliminary survey. This study is important to identify volcanic eruption center which shows potential area of geothermal heat source. The purpose of volcanostratigraphy study in research area is going to distinguish the characteristics of volcanic eruption product that construct the volcanic body. The analysis of Arjuno-Welirang volcanostratigraphy identification are based on topographic maps of Malang sheet with 1:100.000 scale, 1:50.000 scale, and a geological map. Regarding to the delineation of ridge and river, we determine five crowns, three hummocks, one brigade and one super brigade. The crowns consist of Ringgit, Welirang, Arjuno, Kawi, and Penanggungan, the hummocks comprise of Kembar III, Kembar II, and Kembar I, the brigade is Arjuno-Welirang, and the super brigade is Tengger. Based on topographic map interpretation and geothermal prospect evaluation method analysis, shows that Arjuno-Welirang prospect area have good geothermal resource potential. © Published under licence by IOP Publishing Ltd.

关键词： Volcanoes

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Integrated Pore Pressure Model Estimation – Case Study of Jambi Sub-basin, South Sumatera, Indonesia

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IOP Conference Series: Earth and Environmental Science 2021年第1期873卷

作者： Ahmad Farhan Farabi Ignatius Sonny Winardhie Noor Cahyo Wibowo Geophysical Engineering Study Program Faculty of Mining and Petroleum Engineering Bandung Institute of Technology Bandung Indonesia Geophysics Division Pertamina Upstream Technical Center Jakarta Indonesia.

Pore pressure estimation is crucial in drilling wells for safety purposes also a very effective method for dealing with drilling accidents. Determination of overpressure is the main foundation in the evaluation to minimize the non-productive time (NPT). Here we present several models to generate pore pressure analysis of well from Jambi Sub-basin, South Sumatera, Indonesia. The model for estimation pore pressure is carried out by 3 methods: Eaton, Yan & Han, and Kan & Swan. Those methods will be compared to gain a more accurate model estimation within the study area. Kan and Swan's model show the best fit for estimation because this method is suitable for the formation of tester like MDT/DST on higher frequency with parameter of C1 = 0.001 and C2 = 0.0003 for Jambi Sub-basin. The velocity data to construct the 3D pore pressure model was also validated with well data using multi-attribute analysis. The multi-attribute analysis used 2 algorithms, namely step-wise regression and probabilistic neural network (PNN). The analysis show that PNN has a better correlation compared to step-wise regression. The analysis shows the overpressure zone depth is ranges from 1700 – 2000m on Gumai Formation with maximum pressure around 6500 psi. The peak of overpressure dominated by Gumai and Talang Akar formation is caused by the loading mechanism because the rate of sedimentation on thick shale sequence is higher than the rate of dewatering on those formations.

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A review study of metal oxide nanoparticles utilization in wettability alteration mechanism

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AIP Conference Proceedings 2023年第1期2945卷

作者： Wan Mohd Shaharizuan Mat Latif Mohd Syazwan Mohd Musa Norfazliana Abdullah Mohd Syahlan Mohd Syukri Mohd Adly Ibrahim Norzilawati Mohamad Sairoz Norazlan Sharbini Norhafizuddin Husein Ahmad Amirhilmi A. Razak Sagala Farad Oil and Gas Program Faculty of Engineering Universiti Malaysia Sabah Jalan UMS 88400 Kota Kinabalu Sabah Malaysia School of Chemical and Energy Engineering Faculty of Engineering Universiti Teknologi Malaysia 81310 Johor Bahru Johor Malaysia PETRONAS Research Sdn Bhd Jalan Ayer Hitam 43000 Bandar Baru Bangi Selangor Malaysia Department of Chemical and Petroleum Engineering University of Calgary 2500 University Street NW Calgary AB T2N1N4 Canada

Wettability is the property of rock which vital in controlling the location, flow, and distribution of fluids within a reservoir. The increases in the water-wetness will improve both sweep and displacement efficiency, consequently releasing the trapped oil within the pore space and throat of the rock. The water-wetness will lead to a favorable mobility ratio by changing the water and oil relative permeability and reducing the capillary force by decreasing the interfacial tension (IFT) of oil-water within a reservoir. On the other hand, the vast application of nanotechnology also provides the metal oxide nanoparticles as a wettability modifier, although still limited compared to silicon dioxide (SiO2) nanoparticles. Hence, in this review study, the effects of several metal oxide nanofluids: aluminium oxide (Al2O3), cerium oxide (CeO2), cuprum oxide (CuO), iron oxide (Fe2O3), magnesium oxide (MgO), nickel oxide (NiO), titanium dioxide (TiO2), and zirconium dioxide (ZrO2) during wettability alteration of the oil-wet rocks towards water-wet were analyzed and compared with the SiO2. The procedures for artificially modifying the wettability in laboratory experiments are also investigated, including porous media preservation and experimental conditions. The fundamentals of wettability alteration by a nanofluid, which are cleaning and coating mechanisms are presented too. Key factors such as the concentration of nanoparticle, particle size, brine salinity, and the presence or absence of surfactant were also discussed in detail. Meanwhile, the effectiveness of reducing the oil viscosity and increasing the brine viscosity showed that an extra mechanism could be achieved by utilizing the metal oxide nanoparticles, conversely, it was not achieved by the SiO2.

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