Chemical Engineering Commons^™

Heat Exchanger Network Retrofit Under Fouling Effect, Jaturaporn Yanyongsak

Chulalongkorn University Theses and Dissertations (Chula ETD)

The energy conservation by heat exchanger network (HEN) is important in process design according to an increase of energy costs and global environmental concerns. To minimize the energy consumption with positive net present value (NPV), the retrofitted HEN plays an important role in process energy systems. The HEN retrofit model is based on stage-wise superstructure by Yee and Grossmann (1990). In addition, fouling deposition on the surface area of heat exchangers causes extra energy consumption, production loss and maintenance costs. The new proposed model is retrofitting HEN with fouling effects. This method achieves HEN with the optimal trade-offs between energy …

Methane Hydrate Formation And Dissociation : Roles Of Promoters, Kimhak Neak

Chulalongkorn University Theses and Dissertations (Chula ETD)

Roles of promoters become necessary in methane hydrate formation for the attempt of gas storage application, but some additives might cause unwanted results in gas recovery. The effects of amino acids (l-leucine and l-valine) and surfactants, sodium dodecyl sulfate (SDS), and methyl ester sulfonate (MES) was investigated at 8 MPa and 2 to 4 °C. L-leucine system enhanced hydrate formation because of its surface activity and surface adsorption at interfaces. A noticeable methane uptake yield was also observed in the l-valine solution. Its influences might be from the nature of l-valine that has non-polar, aliphatic hydrophobic side chain resulting in …

Optimization Of Single Refrigerant Conocophillips Lng Cascade Process, Naken Saetang

Chulalongkorn University Theses and Dissertations (Chula ETD)

An LNG cascade process operates under high pressure and extremely low temperature to liquefy natural gas, requiring very high work input to the compressors. This thesis performed the optimization of the single refrigerant ConocoPhillips LNG process by a global optimization technique based on the domain and image partitioning methodology (Faria and Bagajewicz, 2012) to minimize work input to the system. The procedure consists of an NLP upper bound and MILP lower bound models. The lower bound model was formulated by discretizing and linear relaxation of the upper bound non-linear equations by assigning new integer variables and a set of linear …

Energy And Exergy Analysis For Cryogenic Process Design/Retrofit, Nattawat Threerachannarong

Chulalongkorn University Theses and Dissertations (Chula ETD)

Energy and Exergy analysis are one of alternative techniques to analyze chemical processes in term of energy quality parameters such as enthalpy, entropy and exergetic temperature. The exergetic temperature can conduct Exergy Composite Curves diagram (ECCs) (Marmolejo-Correa, 2012) which represents exergy targets: exergy requirement, exergy rejection and exergy destruction etc. In addition, these targets can be used for improving processes. The strength points of these analysis are to design the new process and to improve the utility performance. Therefore, these analysis methods have been applied to low-temperature process that requires a large amount of energy consumption. In this work, there …

Removal Of Mixed Vocs Of Benzene, Toluene And Xylene By A Multistage Corona Discharge System, Nitikorn Ditthawat

Chulalongkorn University Theses and Dissertations (Chula ETD)

The oxidation of mixed volatile organic compounds (VOCs) of benzene, tol-uene and xylene in non-thermal plasma corona discharge was investigated. An initial total VOCs concentration of 100 ppm and feed flow rate of 50.0 ml/min were firstly fixed to investigate the effects of an applied voltage and input frequency on VOCs conversion, power consumption and CO₂ and CO selectivities. For a single stage plasma system, under the optimum applied voltage of 8 kV and input frequency of 500 Hz, the system gave the high CO₂ selectivity with the low CO selectivity and the lowest power consumption. At the optimum operationable …

Life Cycle Assessment Of End Of Life Strategies For Waste From Petroleum Production, Nuntawat Urairat

Chulalongkorn University Theses and Dissertations (Chula ETD)

The waste treatment and disposal of oil refining industry sector are one of the significant aspects of environmental concerns. Because they are not only generated in substantial amounts, but also contained with various hazardous substances such as waste oils, spent catalysts, and mercury-contaminated materials. This study aimed to develop and evaluate the waste management strategies, from waste generator (WG) to waste processors (WP), using the material flow analysis (MFA, STAN v.2.6.601) and life cycle assessment (LCA, SimaPro v.8.3.0.0) as an assessment tool. The functional unit is the amount of waste generated from six refineries in the year 2015. The waste …

Kinetics Study For Fischer-Tropsch Synthesis Over Cobalt Catalyst By Kinetic Monte-Carlo Simulation, Nuttawut Pugingna

Chulalongkorn University Theses and Dissertations (Chula ETD)

Kinetic Monte-Carlo simulation was utilized to study the kinetic behaviors of C₁ and C₂ formation in the Fischer-Tropsch synthesis over the cobalt surface by varying reaction conditions. Two reaction models: the carbide mechanism and the CO insertion mechanism were applied to this simulation. The production rates and fractional coverages of each adsorbed species could be calculated under the steady state. Moreover, the combination between carbide and CO insertion mechanism was also studied to suggest the possibility of each reaction mechanism, and compared the results with the reported experimental results under the same conditions. It was ob-served that the C–C bond …

Effecst Of Water On The Methane Hydrate Formation And Dissociation With Hollow Silica And Activated Carbon, Sarocha Rungrussamee

Chulalongkorn University Theses and Dissertations (Chula ETD)

The porous materials, hollow silica (HSC) and activated carbon (AC), were selected to investigate their effects with water on methane hydrate formation and dissociation. The methane hydrate formation with the porous materials was conducted at 8 MPa and 277 K. The dissociation of hydrates was achieved by thermal stimulation with 294 K temperature driving force. The result showed that the hydrate formation of the system with 1:14 HSC to water ratio, the system with excess water, provided the highest methane consumed and water conversion to hydrates. That is because the HSC has low density allowing it to float on water …

Heat Exchanger Network Design/Retrofit With Partitioning Technique For Linearization Of Specific Heat Capacity-Temperature Relation, Siwat Valeekiatkul

Chulalongkorn University Theses and Dissertations (Chula ETD)

Heat Exchanger Network (HEN) design has been studied for 40 years starting from heuristic technique; pinch analysis and design method to mathematical programming. The stage-wise superstructure by mathematical programming from Yee and Grossmann (1990) was one of the famous models suitable for industrial HEN design under assumption of constant average specific heat capacity (Cp) which generally should be fitted by empirical form of cubic equation. Zhu and Asante (1999) and Ayotte-Sauvé et al. (2017) used piece-wise linearization called stream segment model, to approximate Cp. Their Cp approximation techniques used high number of piece-wises to calculate Cp accurately. This paper presents …

Use Of Binary Surfactant Formulations In Low Ift Foam And Surfactant Flood, Sorrawit Tantipalakul

Chulalongkorn University Theses and Dissertations (Chula ETD)

Viscous fingering and early breakthrough are the main problems observed during the water flooding. These problems could be overcome by using foam flooding by coinjection of surfactant solution and nitrogen gas as a mobility control in a porous media to help improve the sweep efficiency. To gain the maximum benefits of foam flooding, ultra-low interfacial tension foam was studied to obtain a foaming system with high sweep efficiency and at the same time high oil solubilization to help mobilize the oil phase from reservoir rock. In this work, mixed surfactant systems between sodium dioctylsulfosuccinate (AOT) and internal olefin sulfonate (IOS) …

Conversion Of N-Pentane To Aromatics: Effect Of Surface Modification By Chemical Liquid Deposition And Promoter Over Nano Scale Ga/Hzsm-5, Sukkatad Sintapanin

Chulalongkorn University Theses and Dissertations (Chula ETD)

This work studied the effects of chemical liquid deposition, i.e., TEOS concentration and multicycle silylation on Ga/HZSM-5 on their catalytic performance in aromatization of n-pentane. The parent nano scale HZSM-5 zeolite catalysts were incorporated with Ga by impregnation method followed by silylation via chemical liquid deposition (CLD) using tetraethyl orthosilicate (TEOS) by varying concentrations and number of cycles. Moreover, the small amount of Pt, Zn, La and P was introduced by co-impregnation method to study the effect of promoter. The physical and chemical properties of catalysts were characterized by N2 physisorption, XRD, NH3-TPD, IPA-TPD, TPO, TPR, SEM and 27Al MAS …

Development Of Lcsoft As A Tool For Life Cycle Assessment Of Environmental Impacts : Incorporating Additional Lcia Methodologies And Environmental Footprint, Tanathip Rattanatum

Chulalongkorn University Theses and Dissertations (Chula ETD)

Life Cycle Assessment (LCA) is a technique to calculate, assess, and analyze environmental impacts through the entire life cycle of products. LCSoft has been continuously developed as LCA software which has ability to integrate with other software e.g. process simulation software and economic analysis software. In addition, LCSoft has several functions which can analyse various environmental effects such as sensitivity analysis, alternative comparison, and eco efficiency analysis. In this thesis, several features were added into LCSoft to cover a wider application range from users and more industrial technologies. This thesis consists of four main parts. First, adding more essential equipment …

Furfurylamine-Based Polybenzoxazine Adsorbent For Co2 Capture: Effect Of Carbonization Temperature And Activation Methods, Thanabhumi Vongtiang

Chulalongkorn University Theses and Dissertations (Chula ETD)

Carbon sorbents are of interest for post-combustion CO₂ capture. Polymers are one of the potential precursors to develop carbon adsorbent with suitable surface functionalities. In this research, furfurylamine-based polybezoxazine was used to produce the carbon adsorbent because of its superior properties such as high char yield, high thermal stability, and low water adsorption. To obtain the carbon adsorbent, benzoxazine monomer was prepared by using furfurylamine, paraformaldehyde, and phenol. Polymerization by a sol-gel technique using xylene as a solvent was employed. The obtained polymer was carbonized at various temperatures: 600, 700, and 800 °C. Physical and chemical activation were then conducted …

Designing Binary Low Ift Surfactant System Using Hld Concept For Oil Recovery, Tukta Jamprakhon

Chulalongkorn University Theses and Dissertations (Chula ETD)

Surfactant-based microemulsion technology is widely used in tertiary enhanced oil recovery applications (EOR). The formulation of suitable surfactant system is a key success in production and economic feasibility of this technology. The middle phase or Winsor Type III microemulsions, employed for selecting appropriate surfactant system, can offer an optimal salinity at which the high oil solubilization capacity and minimum interfacial tension (IFT) or ultralow IFT (<0.01 mN/m) are obtained. By this technology, more remaining oil in the reservoir can be solubilized and mobilized which leads to an improvement of oil recovery. This study aims to formulate surfactant systems for the oil recovery through microemulsion formulation. The novel mixed anionic surfactant system of a sodium dioctyl sulfosuccinate (AOT) and an internal olefin sulfonates (IOS) with different alkyl chain lengths (C15-18, C19-23, C24-28) were used due to its mixture avoiding the surfactant precipitation. The result found that the binary mixture of AOT and (IOS C15-18 and IOS C19-23) can form the middle phase at the mixing ratios of 5:5 to 9:1 (by molar ratio) with heptane and decane. When the fraction of IOS increased in the mixed AOT/IOS system, the optimal salinity (S*) also increased. For the effects of a carbon tail length of IOS surfactant was observed that the tail length increased with decreasing the optimal salinity. The hydrophilic-lipophilic deviation (HLD) for the mixed surfactant system was investigated to individually determine the K and Cc values for the IOS surfactants. The finding from this work provided a guide for surfactant selection through HLD concept to formulate microemulsion-based surfactant flooding for EOR application.

Development Of Group-Contribution Models For Use In Surfactant Selection - Case Studies Of Single And Mixed Surfactant Applications, Woramet Chanachichalermwong

Chulalongkorn University Theses and Dissertations (Chula ETD)

Microemulsion is the surfactant/oil/water system that is applied to many applications such as enhanced oil recovery, cleaning agents, environmental remediation and drug delivery system. To select the suitable surfactant to form an efficient microemulsion system for each specific condition and application, a systematic selection method is needed to reduce time and valuable resources that may be required in the design of an interest product. This work developed a systematic method to select suitable surfactants for a specific application based on several properties including but not limited to types of emulsion, emulsion stability, solubility and toxicology. Since not all models are …

การเตรียมฟิล์มพอลิพิร์โรลบนแผ่นทองแดงโดยวิธีการพอกพูนด้วยไฟฟ้า, ธิดา คุณสมบัติ

Chulalongkorn University Theses and Dissertations (Chula ETD)

งานวิจัยนี้ศึกษาการเตรียมฟิล์มพอลิพิร์โรล (Polypyrrole) บนแผ่นทองแดงโดยเทคนิคการพอกพูนด้วยกระแสไฟฟ้า (Electrodeposit) เพื่อทดสอบผลต่อความสามารถในการป้องกันการกัดกร่อนและค่าการนำไฟฟ้าของแผ่นทองแดงที่ผ่านการเคลือบ ศึกษาตัวแปร คือ ค่าความหนาแน่นกระแสไฟฟ้า เวลาในการพอกพูน และปริมาณผงคาร์บอน รวมถึงขนาดและรูปแบบของช่องทางการไหลของแก๊ส พบว่าชิ้นงานที่เคลือบด้วยฟิล์มพอลิพิร์โรลที่ได้จากการเตรียมในสารละลายอิเล็กโทรไลต์โดยใช้กรดโดเดซิลเบนซีนซัลโฟนิก และพอลิพิร์โรล ความเข้มข้น 0.05 และ 0.15 โมลต่อลิตร ตามลำดับ ที่ภาวะต่างกัน พบว่าที่ภาวะความหนาแน่นกระแสไฟฟ้าที่ 12.7 มิลลิแอมแปร์ต่อตารางเซนติเมตร เป็นระยะเวลา 10 นาที มีประสิทธิภาพการป้องกันการกัดกร่อนและค่าการนำไฟฟ้าที่ได้ดีที่สุด แต่เมื่อมีการเติมคาร์บอนวัลแคน 13.3 มิลลิกรัมต่อลิตร พบว่าสามารถนำไฟฟ้าได้มากขึ้นถึง 338 ซีเมนต์ต่อเซนติเมตร และป้องกันการกัดกร่อนได้ดีขึ้นถึง 0.030 มิลลิเมตรต่อปี และมีค่าความต้านทานเชิงสัมผัสเท่ากับ 0.090 มิลลิโอห์มตารางเซนติเมตร หลังจากนั้นศึกษาการเคลือบพอลิพิร์โรลบนแผ่นทองแดงที่เซาะร่อง 2 รูปแบบ คือ รูปแบบขนาน และรูปตัวยู พบว่ากระบวนการเคลือบนี้สามารถเคลือบแผ่นทองแดงที่มีการเซาะร่องได้ทั้งสองแบบรูปแบบ โดยประสิทธิภาพการป้องกันการกัดกร่อนของแผ่นทองแดงเคลือบดีขึ้น แต่ค่าการนำไฟฟ้าลดลง โดยเฉพาะการเซาะร่องแบบตัวยู

การแยกแก๊สผสมไนโตรเจน/เฮกเซน/1-บิวทีนด้วยเมมเบรนคอมพอสิตไคโตซาน, ภาณุวัฒน์ ภาวิไล

Chulalongkorn University Theses and Dissertations (Chula ETD)

งานวิจัยนี้ได้ศึกษาการแยกแก๊สผสมไนโตรเจน/เฮกเซน/1-บิวทีนด้วยเมมเบรน คอมพอสิตไคโตซานที่ผสมผสานเทคนิคการเตรียม 4 รูปแบบ ได้แก่ 1) การเติมอนุภาคซีโอไลต์ชนิด 4A ปริมาณร้อยละ 0, 1 และ 5 โดยน้ำหนักของไคโตซาน 2) การปรับความหนาของชั้นฟิล์มไคโตซาน 100 และ 50 ไมครอน 3) การใช้วัสดุฐานรองเป็นผ้าสปันบอนด์ชนิดพอลิโพรพิลีนและพอลิเอสเตอร์ และ 4) การเชื่อมขวางเมมเบรนคอมพอสิตด้วยสารละลายกรดซัลฟิวริก นอกจากนั้นยังได้ศึกษาผลการสะสมของตัวเร่งปฏิกิริยาชนิดไตรเอทิลอลูมินัม (TEAL) ที่ใช้ในกระบวนการผลิตพอลิเอทิลีนด้วยเทคโนโลยี CX บนเมมเบรนคอมพอสิตไคโตซานต่อสมรรถนะการแยกแก๊ส จากการศึกษาพบว่าเมมเบรนคอมพอสิตไม่เชื่อมขวางที่มีความหนาของชั้นฟิล์มไคโตซานหนา 100 ไมครอน ผสมผงซีโอไลต์ 4A ปริมาณร้อยละ 1 โดยน้ำหนัก และใช้วัสดุฐานรองผ้าสปันบอนด์ชนิดพอลิโพรพิลีน มีค่าแฟกเตอร์การแยกแก๊สสูงถึง 2.08±0.06 สำหรับคู่แก๊สไนโตรเจน/เฮกเซน และ 1.28±0.10 สำหรับคู่แก๊สไนโตรเจน/1-บิวทีน ในขณะที่ค่าความสามารถในการซึมผ่านแก๊สเท่ากับ 5127±745 แบร์เรอร์ เมื่อใช้อุณหภูมิดำเนินการ 10 องศาเซลเซียส ความดันแก๊สผสมขาเข้า เมมเบรน 4 บาร์ ความดันฝั่งเพอมิเอตเป็นความดันบรรยากาศ (1 บาร์) ความเข้มข้นเฮกเซนและ 1-บิวทีน ในแก๊สผสมเป็นร้อยละ 0.50 และ 4.50 โดยปริมาตร ตามลำดับ แต่ประสิทธิภาพในการแยกแก๊สของเมมเบรนจะลดลงเมื่อได้รับ TEAL และสูญเสียความสามารถในการแยกแก๊สเมื่อถูกแช่ในสารละลาย TEAL ที่ความเข้มข้นร้อยละ 5 โดยน้ำหนัก เป็นเวลา 24 ชั่วโมง

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

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 …

Effectiveness Of Ammonium Ion In Low Salinity Waterflooding In Shaly-Sandstone Reservoir, Hung Vu Quoc

Chulalongkorn University Theses and Dissertations (Chula ETD)

In this study was presented the pre-feasibility study of silica sand processing plant in Sihanoukville province. The resources approximately 8,750,000 tons, would be a high potential deposit for the glass industry. In this study focuses on the characteristics of the silica sand, methodology to remove the impurities which contained high Fe2O3, Al2O3 and another major oxide element, and economic evaluation technique. To identification of silica sand which used sieve analysis, Frantz isodynamic magnetic separator following by electrical microscope, XRD, and XRF. Therefore, to upgrade the quality of silica sand, which is using Shaking Table, Wet High-Intensity Magnetic Separator, and Reverse …

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

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 …

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. …

Mechanistic Modeling Of Nanoparticle-Stabilized Supercritical Co2 Foams And Its Implication In Field-Scale Eor Applications, Doris Patricia Ortiz Maestre

LSU Master's Theses

Previous experimental studies show that nanoparticle-stabilized supercritical CO₂ foams (or, NP CO₂ foams) can be applied as an alternative to surfactant foams, in order to reduce CO₂ mobility in gas injection enhanced oil recovery (EOR). These nanoparticles, if chosen correctly, can be an effective foam stabilizer attached at the fluid interface in a wide range of physicochemical conditions.

By using NP CO₂ foam experiments available in the literature, this study performs two tasks: (i) presenting how a mechanistic foam model can be used to fit experimental data and determine required model parameters, and (ii) investigating the …

Experimental Study Of Low Salinity Water Flooding And Fracturing Effects In Low Permeability Carbonate Reservoir, Benny Arianto Harahap

Theses

In past decades, there were numerous research works demonstrated that salinity alteration of injected water could enhance the oil recovery. Low salinity water (LSW) injection is a type of Enhanced Oil Recovery (EOR) method, which attracts the industrial, and researchers because of its simplicity to use the implications,

Environment-friendly nature, and less cost. In addition to, hydraulic fracturing, also known as hydraulic stimulation, is another EOR method that improves hydrocarbon flow by creating fractures in the Low Permeability Formation (LPF) that connects the reservoir and wellbore. Fractures will increase the permeability of reservoir and give the flow path for hydrocarbon …

Vibration Modification To A.P.I. Fracture Short Term Conductivity Testing Procedure, Blake A. Ereaux

Graduate Theses & Non-Theses

The current API Short Term Fracture Conductivity (volume number) testing procedure provided by the American Petroleum Institute doesn't consistently provide repeatable results. For example, in an independent review of three commercial lab results testing the same sample of proppant the variation between the three had a data spread of nearly 80% (Anderson, 2013). Continuing and refocusing the research performed by Kent Blair's thesis "Modifying Fracture Conductivity Testing Procedures" (Montana Tech, 2015), the goal of this thesis is to expand the lab research results on the use of vibration in the cell loading procedure to improve the repeatability of test results. …

The Effect Of Mineral Composition On Shale Oil Recovery, Andrew Fakhry

Graduate Theses & Non-Theses

Identifying contact angles in porous media is essential for characterizing multiphase flow of fluids in reservoirs. Traditional methods to measure contact angles assume a homogenous structure of reservoir rock; however, microscale pictures by Scanning Electron Microscopes (SEM) show that rock composition varies even inside a single pore. In addition, the preferentiality of oil layer formation is different according to the minerals constituting the reservoir rock. As a result, contact angles have heterogeneous behavior at the pore-scale.

For the purpose of this research, contact angles are measured on the pure minerals that make up the main components of a Bakken reservoir …

Evaluation Of Methods To Model Hydraulic Fractures In Flow Simulation, Ben Doleshal

Graduate Theses & Non-Theses

Modern reservoir studies use reservoir simulation to predict future production and plan reservoir development. Due to the increase in production in unconventional reservoirs in recent years, the number of hydraulically fractured wells has risen drastically. The days of using simple analytic techniques to account for the production of a single hydraulic fracture in a vertical well are gone, and the need to be able to model numerous hydraulic fractures in many stages over long horizontals is required.

This brings up the study question of this research: What is the best way to model hydraulic fractures in a flow simulator? There …

An Application Of Box-Jenkins Approach In Forecasting Nigerian Crude Oil Prices., Bashir Umar Faruk

Bullion

Nigerian government has been adopting Moving Average (MA) method in pegging crude oil price benchmark. However, large discrepancy between the projected oil price benchmark and the actual international crude oil prices is observed over time. Therefore, the main objective of this research is to investigate whether Box-Jenkins approach could provide a lasting solution to the problem of inefficient oil price forecast in the Nigerian budgeting process. In our quest for an appropriate oil benchmark, monthly bonny light crude oil prices for the period of April 1986 to December 2015 are used.

Diagenesis And Formation Stress In Fracture Conductivity Of Shaly Rocks; Experimental-Modelling Approach In Co2-Rock Interactions, Abiola Olukola Olabode

LSU Doctoral Dissertations

In large scale subsurface injection of carbon dioxide (CO₂) as obtainable in carbon sequestration programs and in environmentally friendly hydraulic fracturing processes (using supercritical CO₂), long term rock-fluid interaction can affect reservoir and seal rocks properties which are essential in monitoring the progress of these operations. The mineralogical components of sedimentary rocks are geochemically active particularly under enormous earth stresses, which generate high pressure and temperature conditions in the subsurface. While geomechanical properties such as rock stiffness, Poisson’s ratio and fracture geometry largely govern fluid flow characteristics in deep fractured formations, the effect of mineralization can …