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Full-Text Articles in Geological Engineering
Ore Reserves Estimation Of The Nam Nga Coal Deposit, Lao Pdr, Using Geostatistical Method, Tongvang Bliachongvang
Ore Reserves Estimation Of The Nam Nga Coal Deposit, Lao Pdr, Using Geostatistical Method, Tongvang Bliachongvang
Chulalongkorn University Theses and Dissertations (Chula ETD)
This research study focuses on estimating the coal deposit quantity and qualities as CV and AC at Nam Nga coal deposit, Lao PDR using OK and SGS geostatistical methods. A total of 295 assays data from 51 exploration drill holes collected from LID Company were used. The results reveal that OK produces geological resource of 2.2 MT with an average CV of 3,733 kcal/kg and an average AC of 48.68 %. The mineable reserve computed from OK's ultimate pit design and pit adjustment are 0.55 MT. The OK method produces 9.32 MT of wastes, yielding a stripping ratio of 10.4:1. …
Effects Of Monovalent Ions On Low Salinity Waterflooding In Shaly-Sandstone Reservoir, Ativish Yomchan
Effects Of Monovalent Ions On Low Salinity Waterflooding In Shaly-Sandstone Reservoir, Ativish Yomchan
Chulalongkorn University Theses and Dissertations (Chula ETD)
Multi-component Ion Exchange (MIE) was proved to be a major mechanism occurred during Low Salinity Waterflooding (LSWF). Reduction of both total salinity and concentration of divalent ions of injected water together with a presence of monovalent ion results in dissolution of divalent ions linking between rock surface and oil. As a consequence, oil is liberated from rock surface. This study aims to study effects of monovalent ions in MIE mechanism. Stirring test is performed and results show that ion with less hydration radius tends to be more active in MIE; hence, potassium ion and cesium ion illustrate potential in oil …
Evaluation Of Wax Deposition Prevention For Crude Oil Production From Mae Soon Oil Field, Htet Myat Min
Evaluation Of Wax Deposition Prevention For Crude Oil Production From Mae Soon Oil Field, Htet Myat Min
Chulalongkorn University Theses and Dissertations (Chula ETD)
Waxy crude oils are normally found in petroleum reservoirs. Crude oil with the wax formation is one of the crucial problems for flow assurance of pipeline transportation in oil and gas production. This issue can commonly cause wax deposition problem and it has made a huge amount of economic losses such as production, time and maintenance cost. Therefore, it is a critical aspect to deal with wax deposition for crude oil flow assurance, especially at the surface region in cold climate. In this study, n-heptane and poly (maleic anhydride-alt-1-octadecane) or MA as the inhibitors with different concentrations will be measured …
Pre-Feasibility Study Of Silica Sand Processing Plant In Sihanoukville Province, Cambodia, Sochea Ros
Pre-Feasibility Study Of Silica Sand Processing Plant In Sihanoukville Province, Cambodia, Sochea Ros
Chulalongkorn University Theses and Dissertations (Chula ETD)
Nowadays, bottom ash and flue gas desulfurization (FGD) gypsum are by-products of the coal combustion process from coal-fired power plant. Bottom ash has been applied in many applications such as landfill, cement industry etc., and FGD gypsum is applied in cement and wallboard industry. Also, they can be used in agricultural activities for soil amendment but the amount of bottom ash and FGD used in this function is still low. Furthermore, biochar has long been used to improve soil fertility. The positive impacts of biochar amendment on soils are that it can increase soil capacity to adsorb plant nutrients, decrease …
Utilization Of Biochar Coupled With Coal Combustion Products For Degraded Soil Amendment, Thidphavanh Sengsingkham
Utilization Of Biochar Coupled With Coal Combustion Products For Degraded Soil Amendment, Thidphavanh Sengsingkham
Chulalongkorn University Theses and Dissertations (Chula ETD)
Low Salinity Waterflooding (LSWF) has been intensively studied worldwide as it is a low-cost technique. By injecting water with very low salinity compared to formation water in the reservoir, the method changes equilibrium between rock surface, oil and surrounding water, causing wettability alteration through Multi-component Ion Exchange (MIE) mechanism. In this study, ammonium ion is added into low salinity water to facilitate the MIE mechanism in shaly-sandstones reservoir. Experiments are performed with shaly-sandstone rock as it contains both calcium and magnesium ions as part of clays and ammonium ion can express its potential by triggering MIE mechanism. Stirring test, spontaneous …
Performance Evaluation Of Integrated Co2 Huff-N-Puff And Wag In Low-Pressure Heterogeneous Reservoir, Hutthapong Yoosook
Performance Evaluation Of Integrated Co2 Huff-N-Puff And Wag In Low-Pressure Heterogeneous Reservoir, Hutthapong Yoosook
Chulalongkorn University Theses and Dissertations (Chula ETD)
The integrated CO2 Huff-n-Puff and WAG is a novel technique to combine CO2 Huff-n-Puff technique that conducted at early state and followed by WAG technique until the end of operating time. This technique is effectiveness in term of increased oil recovery and reduced CO2 utilization. However, the integrated CO2 Huff-n-Puff and WAG process contains numerous adjustable operating parameters. Hence, numerical simulation study and sensitivity analysis become essential to investigate the effects of main operational parameters and evaluate the performance of the integrated CO2 Huff-n-Puff and WAG process in low-pressure heterogeneous reservoir to achieve the maximum benefits. According to simulation results, …
Designing Efficient Petroleum Fiscal System For Mozambique, Nelson Victor
Designing Efficient Petroleum Fiscal System For Mozambique, Nelson Victor
Chulalongkorn University Theses and Dissertations (Chula ETD)
Nowadays, tax regime is designed to attract investment and provide the contractor with fair return on investment, at the same time, provide the host government with adequate resources for rent, thereby resulting in win-win situation. This study analyses the existing petroleum fiscal regime in the Republic of Mozambique and proposes a more efficient and flexible regime. The analysis shows that the government take currently remains at around 39% while the contactors' net present value (NPV) increases as field sizes and oil prices increase. The current system is considered a regressive system which is inefficient in distributing wealth from oil profit. …
Coal Combustion Products Utilization For Soil Amendment, Tran Thi Anh Tuyet
Coal Combustion Products Utilization For Soil Amendment, Tran Thi Anh Tuyet
Chulalongkorn University Theses and Dissertations (Chula ETD)
Nowadays, coal has a crucial role in generating energy all over the world. As a result, the consumption of coal creates a huge amount of coal combustion products, including bottom ash and fly ash. The coal ash has the potential characteristics to become a resource material in agriculture such as its texture, water holding capacity, bulk density, pH etc., and contains almost all the essential plant nutrients. However, most of the coal ash created is dumped into the landfill, which is a contributing factor in the environmental degradation. This study wants to use coal ash in agriculture as a way …
Time Series Pattern Discovery Techniques For Well-To-Well Log Correlation, Chanchai Apiwatsakulchai
Time Series Pattern Discovery Techniques For Well-To-Well Log Correlation, Chanchai Apiwatsakulchai
Chulalongkorn University Theses and Dissertations (Chula ETD)
Well log data is one of the most abundant data sources for subsurface characterization since almost all drilled wells are logged. Subsurface characterization requires correlated well log information. Processes to help perform well-to-well log correlation have been developed in this study based on the two approaches: pattern matching and pattern discovery. Pattern matching focuses on finding a known pattern of interest in uncorrelated wells. The use of Euclidean, Hamming, and Levenshtein distances in similarity measurement, Piecewise Aggregate Approximation (PAA), and Symbolic Aggregate approXimation (SAX) data representation helps create reduced-resolution while maintains the main characteristics of the signals. Multi-resolution analysis provides …