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28th International Ocean and Polar engineering Conference, ISOPE 2018

作者： Prasad, Siddhant K. Mech, Deepjyoti Nair, Vishnu Chandrasekharan Gupta, Pawan Sangwai, Jitendra S. Gas Hydrate and Flow Assurance Laboratory Petroleum Engineering Program Department of Ocean Engineering Indian Institute of Technology Madras Chennai India

ISBN: (纸本)9781880653876

Asphaltenes are heavy and polar fractions present in crude oil. Literature survey reveals that studies underlying the effect of individual components of crude oil on hydrate formation are rare. In this work, asphaltene fractions were extracted from a vacuum residue of the crude oil according to method based on IP143/90 (AlHumaidan et al., 2017) and characterized by FTIR, element analysis, SEM and MALDI-TOF MS. Thereafter, the effect of asphaltenes was studied on the phase stability of pure methane hydrate system at 1000 ppm and 10000 ppm concentration. It has been observed that the asphaltene plays an important role in elucidating the phase stability of methane hydrate systems. Copyright © 2018 by the International Society of Offshore and Polar Engineers (ISOPE)

关键词： Phase stability

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Preliminary Gravity Study of Pre-Tertiary and Tertiary Rock in Northern Kebumen, Central Java, Indonesia 2

Preliminary Gravity Study of Pre-Tertiary and Tertiary Rock ...

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2nd Southeast Asian Conference on Geophysics, SEACG 2018

作者： Nizar Ahmady, Faridz Santoso, Djoko Geophysical Engineering Study Program Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Bandung40132 Indonesia Applied Geophysics Research Group Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Bandung40132 Indonesia

Luk Ulo Melange Complex is a Pre-Tertiary rock formation consisting of various lithological background and complicated geological structure. Located in Northern Kebumen Regency, this rock is originally interpreted as products of tectonic process caused by paleo-subduction between Indian Oceanic Plate beneath Eurasian Plate in Cretaceous age. According to previous study on geological surface investigation shows that the melange complex is tectonically overlain by Tertiary sedimentary formation. On the contrary, geophysical study of the subsurface condition of the area is still under discussion due to limited of measured data. In order to obtain detailed subsurface image, gravity profiling was measured and interpreted across both Tertiary and pre-Tertiary rock. Frequency domain filter and designed moving average filter were used to separate residual and regional anomaly. The results denote gravity value of residual anomaly varying from -5 to +5 mGal, while regional anomaly is ranging from 150-180 mGal respectively. The preliminary interpretation was developed by taking into account the geological information and also the data that was collected during field campaign. Overall, high gravity anomaly is interpreted as diabase intrusion in the middle of research area. Meanwhile, low gravity anomaly indicated clay rich rock material related to matrix content of Luk-Ulo Melange Complex in the northern area. © 2019 IOP Publishing Ltd. All rights reserved.

关键词： Frequency domain analysis

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Revealing the shear-wave velocity structure of Tangkuban Parahu Volcano, West Java, Indonesia using Ambient Noise Tomography

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Journal of Volcanology and Geothermal Research 2025年 465卷

作者： Aditya Lesmana Awali Priyono Andri D. Nugraha Zulfakriza Shindy Rosalia David P. Sahara Rexha Verdhora Ry Sri Widiyantoro Wahyu Hidayat Faiz Muttaqy Devy Kamil Syahbana Ahmad Basuki Kristianto Geophysical Engineering Study Program Faculty of Minning and Petroleum Engineering Institut Teknologi Bandung Bandung 40132 Indonesia Global Geophysics Research Group Faculty of Minning and Petroleum Engineering Institut Teknologi Bandung Bandung 40132 Indonesia Research Center for Disaster Mitigation Institut Teknologi Bandung Bandung 40132 Indonesia Faculty of Engineering Maranatha Christian University Bandung 40164 Indonesia Geophysical Engineering Study Program Faculty of Technology Mineral and Energy UPN Veteran Yogyakarta 55283 Indonesia Research Center for Geological Disaster National Research and Innovation Agency (BRIN) Bandung Indonesia Center for Volcanology and Geological Hazard Mitigation (CVGHM) Geological Agency (GA) Jalan Diponegoro No. 57 Bandung 40122 Indonesia

We present a shear-velocity model for the Tangkuban Parahu Volcano (TPV) using ambient seismic noise tomography. We used data from a three-month 55-temporary netwok deployed between October 2021 and February 2022. We cross-correlated the vertical components at each station to extract an empirical Green's function, to generate group velocity maps within the periodicity range of 1 to 6.5 s. We then construct a three-dimensional model of shear-wave velocity to a depth of 5 km below the summit. Our analysis revealed distinct patterns of high and low velocity values, associated with the presence of the old Sunda caldera, unmapped local structures, and surface geothermal manifestation around TPV. We identified low velocity zones indicative of shallow reservoirs and pathways for magma migration from the subsurface to surface crater. Additionally, high velocity zones observed, correspond to cooled magmatic bodies.

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Difference between steam-water and air-water relative permeabilities in fractures

Difference between steam-water and air-water relative permea...

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International Collaboration for Geothermal Energy in the Americas - Geothermal Resources Counsil: 2003 Annual Meeting

作者： Chen, Chih-Ying Li, Kewen Horne, Roland N. Stanford Geothermal Program Department of Petroleum Engineering Stanford University Stanford CA 94305-2220 United States

The goal of this research has been to compare steam- and air-water transport through fractured media and gain better understanding of the behaviors of relative permeability in fractures. Air-water (or nitrogen-water) relative permeabilities are often used for geothermal reservoir simulations while steam-water relative permeabilities in fractures are rarely measured owing to difficulties and complexities of steam-water experiments. A novel and accurate methodology was developed to capture the unstable nature of the steam-water flow in a smooth-walled fracture. Repeatable results were obtained and show that steam-water relative permeabilities are different from nitrogen-water relative permeabilities. The average steam-water relative permeabilities show less phase interference. Also, comparing with previous research into air-water relative permeabilities in fractures, both average steam- and nitrogen-water relative permeabilities were seen to behave closer to the X-curve.

关键词： Geothermal water resources

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Petrophysics and rock physics using VTI model for low permeability and high porosity reservoir in CCS Gundih gas field pilot project, Indonesia 2

Petrophysics and rock physics using VTI model for low permea...

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2nd Southeast Asian Conference on Geophysics, SEACG 2018

作者： Fatkhan Danio, H. Anggarini, L.T. Mudatsir, O.A. Sule, M.R. Seismology Exploration and Engineering Research Group Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Indonesia Geological Engineering Study Program Universitas Pertamina Indonesia Geological Engineering Study Program Institut Teknologi Bandung Indonesia

A pilot Carbon Capture and Storage (CCS) project in Indonesia is planned to be implemented in Gundih area, Central Java Province in Indonesia. Prior to conducting CO2 injection, reservoir characterisations have to study thoroughly to assure that the reservoir is to meet with CCS standard requirements. The Jepon well in the Gundih fied was proposed as a suitable site for CO2 injection. The decision was made to proceed with a comprehensive site assessment and geological modelling of the Jepon area. This site was selected based on the reason the presence of a potentially suitable reservoir (Ngrayong Sandstone) and primary and secondary seals (Bulu Limestone and Wonocolo claystone). Using logging data, petrophysics and rock physics model are used to evaluate potential of the CO2 injection site. Permeability results from petrophysics calculations and recent injection tests show very small;whilst porosity is relatively high. This can be caused by fractures mostly are not connected. Hence, rock physics for the reservoir is evaluated and modelled as anisotropy or Vertical Tranverse Isotropy (VTI) in which fractures with preferred orientation. Stiffness calculations for VTI medium with different aspect ratio shows consistent with low permeability result. © 2019 IOP Publishing Ltd. All rights reserved.

关键词： Carbon capture

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Intermittent oxidation kinetics and metal/oxide interfacial undulation

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Physical Review B 2024年第8期110卷 085402-085402页

作者： Dongxiang Wu Xianhu Sun Judith C. Yang Guangwen Zhou Department of Mechanical Engineering & Materials Science and Engineering Program Department of Chemical and Petroleum Engineering

The phenomenon of oxygen adsorption induced surface restructuring is widespread across various metal-oxygen systems, yet its impact on initiating bulk oxide formation remains largely unexplored. Through in situ atomic-resolution electron microscopy observations of surface oxidation of Cu(110) and Cu85Au15(110), we unveil intermittent oxide-film growth modulated by oxygen-induced surface restructuring. This modulation is evidenced by repeated pinning of the Cu2O growth front at isolated Cu columns of the c(6×2)-O reconstruction, owing to required long-range diffusion of Cu and O atoms to the Cu2O growth front. We reveal that Cu vacancies, generated at the Cu2O growth front, are injected into the Cu2O/Cu interface, inducing hill and valley undulation of the Cu2O film. In contrast, atomic vacancies produced during the Cu85Au15(110) oxidation preferentially migrate into interfaces between Au-rich and Au-poor regions in the bulk, resulting in a flat and adherent Cu2O film. These findings demonstrate the critical role of oxygen-induced surface restructuring in modulating oxide film growth kinetics and the manipulability of the fate of injected vacancies by alloying, thereby offering insights applicable to a broader range of metal-oxygen systems for fine-tuning oxidation kinetics and enhancing oxide/metal interfacial adhesion.

关键词： Surface & interfacial phenomena Surface reconstruction Surface growth Density functional theory Transmission electron microscopy

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Product Analysis of Supercritical Fischer-Tropsch Synthesis: Utilizing a Unique On-Line and Off-Line Gas Chromatographs Setup in a Bench-Scale Reactor Unit

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American Journal of Analytical Chemistry 2015年第8期6卷 659-676页

作者： Amro Kasht Rehan Hussain Minhaj Ghouri Jan Blank Nimir O. Elbashir Chemical Engineering Program & Petroleum Engineering Program Texas A & M University at Qatar Doha Qatar

The utilization of supercritical fluids (SCF) in the Fischer-Tropsch Synthesis (FTS) further complicates the hydrocarbon products identification and analysis process due to the dilution of hydrocarbon peaks by the predominant solvent peak. Therefore, in this project, a custom-made Gas Chromatography (GC) analysis system was designed and implemented to identify and quantify SCF-FTS products. The FTS products were identified using two different methods. The first was through retention time matching by injecting standard solutions, and the second was through the use of the GC/MS system. The quantification of CO and CH4 was achieved by using external standards, where the CO conversion was calculated by relating the peak area of CO to the peak area of an internal standard (argon) while the CH4 selectivity was calculated by relating the peak area of CH4 to that of CO. After setting and calibrating the GC system, two reaction conditions (gas phase: 240°C, 20 bar syngas with 2:1 H2:CO molar feed ratio and for the supercritical fluids FTS (SCF-FTS): 240°C, 65 bar with 20 bar syngas partial pressure and 2:1 H2:CO molar feed ratio) were used to compare the different FTS reaction media. The comparison between the gas phase FTS and the SCF-FTS showed the following: carbon monoxide conversion was improved by 14% in the SCF-FTS, while the hydrocarbon product profile SCF-FTS showed 78% reduction in light hydrocarbons (C1 - C4) products, 35% increase in middle distillates (C11 - C22) products compared to gas phase FTS. These improvements have resulted in higher chain growth probability for the SCF-FTS (α = 0.85) compared to the gas phase FTS (α = 0.76). These results are generally in agreement with previously reported enhancement in the SCF-FTS[1].

关键词： Supercritical Fluids Fischer-Trospch Synthesis Gas Chromatography Mass Spectrometry

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Rate phenomena in the reaction of hydrogen sulfide with a pelletized zinc oxide-based sorbent

Rate phenomena in the reaction of hydrogen sulfide with a pe...

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Separations Division - Core programming Topic at the 2011 AIChE Annual Meeting

作者： Gutirrez, Carmen F. Palmer, Bruce R. Berrouk, Abdallah S. Peters, Cor J. Chemical Engineering Petroleum Institute Abu Dhabi United Arab Emirates Chemical Engineering Program Texas A and M University at Qatar Doha Qatar

ISBN: (纸本)9781618397232

Zinc oxide is an exceptionally effective sorbent for hydrogen sulfide. This oxide exhibits high affinity for hydrogen sulfide and consequently has been explored to remove sulfur from gasoline and diesel transportation fuels and from Claus sulfur plant tail-gas. This study focuses on a zinc oxide-based solid sorbent for sorption of H2S from dilute gas streams. A zinc oxide-based sorbent containing 65% zinc oxide, 18% peptized alumina and 17% perlite was prepared by wet pelletizing the solid reactants, drying the product at 150°C for one hour and heating the solids at 635°C for one hour. After cooling, the solids were crushed, dry sieved, wet sieved, and redried at 150°C for an hour to produce the sorbent. The sorption of hydrogen sulfide was measured as a function of time with a thermogravimetric analyzer. Sorption rate is shown as a function of hydrogen sulfide partial pressure, temperature, sorbent granule particle size, and sorbent granulation method. In addition the capabilities of sorbent regeneration are explored. A model for this system indicates that rate is governed by hydrogen sulfide transport through a growing zinc sulfide product layer in particles which constitute the agglomerated sorbent. The pelletized sorbent prepared in the present study reacts at a higher rate than a similar sorbent previously prepared by spray drying.

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Molecular dynamics simulation on modeling shale gas transport and storage mechanisms in complex nano-pore structure in organic matters

Molecular dynamics simulation on modeling shale gas transpor...

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Unconventional Resources Technology Conference, URTeC 2015

作者： He, Shuai Liu, Honglin Qin, Guan Petroleum Engineering Program Department of Chemical and Biomolecular Engineering University of Houston TX United States Langfang Branch PetroChina Company Limited China

ISBN: (纸本)9781613994337

In this paper, we firstly investigate the natural gas storage and transport behavior in simple geometries such as two parallel-plates model and carbon nanotube model by using molecular dynamics simulation. Then, we combined molecular simulation (MS) with digital rock reconstruction technique to investigate the natural gas storage and transport behavior in ultra-low permeable shale matrices containing nano-scale pore structures. 3-D nano-pore structure is recreated using the Markov Chain Monte Carlo (MCMC) simulation based on the 2-D scanning electron microscopy (SEM) image of shame sample. Generally, single molecular layer adsorption in simple geometries is observed and the adsorption isotherm can be fitted by Langmuir type of adsorption isotherm. Besides, non- continuum features of gas transport behaviors such as slippery boundary and Knudsen diffusion dominated flow demonstrate that conventional Darcy's equation may not adequately describe the flow behavior in shale reservoir. Knudsen diffusivity is obtained by molecular simulation which could be beneficial in reservoir simulation. The combination of MCMC and molecular simulation (MS) offers a unique approach towards investigating gas transport in complex porous networks in the shale formation. Copyright 2015, Unconventional Resources Technology Conference.

关键词： Molecular dynamics

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Design of an oil pipe inner surface inspection system

Design of an oil pipe inner surface inspection system

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IEEE GCC Conference and Exhibition

作者： Bouchalkha, Abdellatif Hamad, Mohammed Sabri Al-Beloushi, Khaled Al-Qayedi, Mana Al-Hammadi, Khalid Physics Department Art and Science College Petroleum Institute Abu Dhabi United Arab Emirates Electrical Engineering Program Petroleum Institute Abu Dhabi United Arab Emirates

ISBN: (纸本)9781612841199

Magnetic Flux Leakage (MFL) techniques are the commonly used methods in the inspection of oil pipelines. This technique presents several limitations in detecting cracks. In this paper we present a novel method using ultrasound waves to obtain 3-d images of pipeline inner surfaces. Using this technique, cracks on the inner surface of a steel pipeline were identified and measured. © 2011 IEEE.

关键词： Nondestructive examination

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