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Lessons learned from coreflood experiments with surfactant-polymer and alkali-surfactant-polymer for enhanced oil recovery

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Petroleum 2023年第4期9卷 487-498页

作者： Ivan Kurnia Muhammad Fatchurrozi Riyaz Ghulam Anwary Guoyin Zhang Reservoir Engineering Research Group Institut Teknologi BandungIndonesia Petroleum Engineering Undergraduate Study Program Institut Teknologi BandungIndonesia Petroleum Recovery Research Center New Mexico TechUnited States

A review of coreflood experiments for chemically enhanced oil recovery(EOR)is presented in this paper,particularly surfactant-polymer(SP)and alkali-surfactant-polymer(ASP)*** objective of this review is to gain a general outlook and insight from coreflood experiments injecting SP or ASP slug as tertiary *** discussion is separated into sections based on relevant core and fluid properties as well as surfactant selection and SP/ASP slug design and their impact on incremental *** studies in this review have been published within the last twenty years but few older coreflood works have been included for *** in each reviewed study have been summarized in tables to help readers gain detailed *** learned from these past experiments should help other chemical EOR practitioners or students of the field in benchmarking or improving the outcomes of their future SP/ASP experiments.

关键词： Enhanced oil recovery Surfactant Polymer Alkali Coreflood

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Theoretical study of CO2 hydrogenation to methanol on isolated small Pdx clusters

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Journal of Energy Chemistry 2019年第8期28卷 79-87,I0004页

作者： Adhitya G.Saputro Refaldi I.D.Putra Arifin L.Maulana Muhammad U.Karami Mochamad R.Pradana Mohammad K.Agusta Hermawan K.Dipojono Hideaki Kasai Engineering Physics Research Group Institut Teknologi BandungBandung 40132 Indonesia Research Center for Nanosciences and Nanotechnology Institut Teknologi BandungBandung 40132 Indonesia Akashi College National Institute of TechnologyHyogo 674-8501 Japan Graduate School of Engineering Osaka UniversityOsaka 565-0871 Japan Department of Applied Physics Osaka UniversityOsaka 565-0871 Japan

CO2 hydrogenation to methanol on small size Pdxclusters(x = 7, 9 and 13) has been studied using density functional theory calculations. It has been found that in contrast to metallic Pd system, these small Pdxclusters can interact well with CO2 molecule. CO2 molecule can be adsorbed with a bidendate configuration on the Pdxclusters. The formation of CO2 bidendate adsorption configuration facilitates the first step of CO2 hydrogenation reaction on the clusters. The energy profiles for formate pathway and reverse water gas shift + CO hydrogenation pathways on Pdxclusters are quite similar with Cu(111) surface, except for the first and last hydrogenation steps where the Pdxclusters have lower activation energies. This improvement causing the Pdxclusters to have a tolerable turn over frequencies values. In general, the usage of Pd in the form of small size cluster can improve the catalytic performance of metallic Pd for the CO2 hydrogenation to methanol because small size Pd cluster can act not only as an H2 dissociation center but also as a CO2 hydrogenation center.

关键词： Pdx clusters CO2 Adsorption Hydrogenation Methanol Density functional theory

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Analysis of explosion risk factor potential on coal reclaim tunnel facilities by modified analytical hierarchy process

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International Journal of Coal Science & Technology 2018年第3期5卷 339-357页

作者： Nuhindro Priagung Widodo Budi Sulistianto Ahmad Ihsan Mining Engineering Group Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Jl. Ganesha No. 10Bandung 40132 Indonesia

This study focused on developing a risk assessment method for explosion at a coal reclaim tunnel （CRT） facility. The method was developed based on an analytical hierarchy process （AHP）, which is an expert system that quantifies the factors of explosion incidents, based on events and hierarchies. In this paper, the proposed model was modification from original AHP model, specifically modifying the structure from ＂alternative＇s results＂ to ＂total risk-rating＇s results＂. The total risk-rating is obtained by summing up risk-rating of each factor, where the risk-rating is a multiplication product of the risk value by the AHP weighted value. To support decision-making using the expert system, data on the real conditions of the CRT were collected and analyzed. A physical modeling of the CRT with laboratory-scale experiments was carried out to show the impact of a ventilation system in CRT on diluting the methane gas and coal dust, in order to support the quantification of AHP risk value. The criteria to evaluate the risk of explosion was constructed from six components that are： fuel, oxygen, ignition, confinement, dispersion, and monitoring system. Those components had fifty-two factors that serve as sub-components （root causes）. The main causes of explosion in CRT were found to be： mechanical ventilation failure and abnormal ventilation, breakdown of monitoring system, and coal spontaneous-combustion. Assessments of two CRT facilities at Mine A and Mine B were carried out as a case study in order to check the reliability of the developed AHP method. The results showed that the risk rating of Mine A was classified as high and Mine B was classified as medium, which is in a good agreement with the site conditions.

关键词： Risk Explosion Coal reclaim tunnels Analytical hierarchy process

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