Raphael Bissen

Chulalongkorn University · Department of Mining and Petroleum Engineering

Microplastic pollution is one of the most significant global environmental concerns. This study represents a first attempt to establish connections between the concentration of microplastics and both ocean surface circulation direction and land-based sources along the western Gulf of Thailand. Microplastics at the high-tide line from 25 beaches in...

The Cenomanian (Upper Cretaceous) Maha Sarakham Formation of the Khorat Basin, northeastern Thailand consists of three evaporite units (Lower, Middle and Upper Salt) interbedded with clastic sediments and exhibits abundant deposits of potash. Although numerous studies have been carried out on the Khorat potash deposit, results are still equivocal w...

Salt caverns are an adequate solution for the sequestration of CO2 (large capacity, safety and long-term operation). The large rock salt deposits of the Maha Sarakham Formation represent a very promising location. Designing salt caverns is still a complex issue. In this paper, the stability of typical cavern shapes (spherical, cylindrical, teardrop...

Plastic debris is thought to be widespread in freshwater ecosystems globally¹. However, a lack of comprehensive and comparable data makes rigorous assessment of its distribution challenging2,3. Here we present a standardized cross-national survey that assesses the abundance and type of plastic debris (>250 μm) in freshwater ecosystems. We sample su...

Due to the effects of an anthropogenic global warming, the concern about the emissions of carbon dioxide (CO 2) into the environment has increased in various industries like petroleum industry. Currently, the use of the geological storage techniques, such as carbon capture and sequestration (CCS), is the most promising way to mitigate these emissio...

Beach ridges are depositional features that allow reconstruction of past sea-level variations, sediment dynamics, and storm activity. However, there are still very few systematic studies focusing on beach ridges available from the Gulf of Thailand. Along the east coast, satellite images provide evidence of beach ridges in the Chanthaburi Province,...

The main carbon dioxide (CO 2 ) emissions in Thailand come from the energy sector. Gas-based power plants, including natural gas and biogas, are CO 2 point sources, and are mostly located in the Khorat Plateau. Geological CO 2 storage is an important element in the effort to reduce CO 2 emissions from CO 2 point sources. This study is a preliminary...

This study used Discrete Element Modelling (DEM) to simulate the two-dimensional structural deformation within fold and thrust belts that are associated with plate collision. A total of 12 models were performed with different basal inclinations and pre-kinematic thickness. The results reveal that the thrust-related structures are dominated by pop-u...

Soundless Chemical Demolition Agents (SCDAs) are an environmentally friendly and safer alternative to traditional rock fragmentation methods. Admixtures are used to change the rheological properties and performance of SCDAs. This study aimed to investigate the effect of various concentrations of chemical accelerators (chloride salts) and viscosity...

At present a total of 118 hot springs are distributed throughout Thailand. Several studies with a focus on high-temperature hot springs related to geothermal resources were conducted in the northern and southern parts of the country. Geochemical data, however; especially isotopes of medium-to-low temperature hot springs are still scarce. Geochemica...

Silasiam mine is a large granite quarry for aggregate used for high building construction and road infrastructure. 2.4 Mtons of granite rock is produced as aggregate annually with a reserve of 48.4 Mtons. The objective of this study is to maximize the underlying value of the mineral resource by improving project concepts, optimizing the project dev...

1. Abstract The sample of silica sand is taking from Nakon Pathom province in Thailand. It has been reported to be good quality for glass industry. Presently, it is mined for construction sand and transported to many destinations inside and outside the country without any processing. According to this reason, the price of silica sand was low. Becau...

Microplastics (< 5 mm) are a major environmental issue due to their ubiquitous distribution in the environment. A range of studies have found significant levels in beach sand worldwide. Microplastics originate from inland and /or ocean-based sources and are due to years of improper disposal of plastic materials, mismanagement and negligent litterin...

Greenhouse gases like carbon dioxide (CO2) are crucial regarding global atmospheric temperatures. In Thailand, CO2 emissions quadrupled over the past 3 decades since 1989. The power generation sector is the main contributor by burning fossil fuels to produce electricity. These emissions are among the main reasons for Global Warming. Therefore, the...

In this study, the paleogeography and the natural history of sea level change was reconstructed for the Sam Roi Yot National Park, Prachuap Khiri Khan, Gulf of Thailand, one of the tropical natural conservation areas. Beach ridge sand and marine shells attached to sea notches were dated by Optically Stimulated Luminescence and conventional C 14 rad...

Locating suitable caves and stalagmites for palaeoenvironmental and palaeoclimatic studies can be challenging. Isotopic geochemical analyses, albeit commonly performed for palaeoclimatic reconstruction, are also time consuming and costly. Therefore, petrographic and non-destructive morphological studies on speleothems become desirable to facilitate...

1. Abstract Thailand's fast growing economy that leads to a boom in the construction which increases the demand of aggregates. Silisomboonsub is one company that mainly produces limestone aggregate for construction while its other mine is producing about 200t/h of granite aggregate. New granite crushing plant is designed using Bruno simulation soft...

Mehr als 60% aller Lagerstätten der Welt sind sogenannte NFR´s („Naturally Fractured Reservoir“). Für die optimale Erschließung einer solchen geklüfteten Lagerstätte ist die umfassende Dokumentation des Kluftnetzwerkes und seiner räumlichen Variabilität von entscheidender Bedeutung. Eine wesentliche Herausforderung besteht dabei in der Extrapolatio...

The detailed documentation of joint systems and their spatial variability are crucial for the optimal exploitation of fractured reservoirs. The extrapolation of well data up to reservoir scale is complex. This study investigates the potential of geomechan

prediction of fracture systems geology photogrammetry tectonics rock mechanics DFN modeling FE modeling

Der Hauptrogenstein ist im Ober- Bajocium, im Braunen Jura(bjHR), gebildet worden. Im Bereich des südlichen Oberrheingrabens ist der Hauptrogenstein als hellgrauer bis hellbräunlicher, schräggeschichteter bis massiger Kalkoolith ausgebildet. Die Gesamtmächtigkeiten dieser durch Mergelbänke und Schill-Lagen gegliederten Einheit reichen von 40m bis c...

geology rock mechanics