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Showing 1 to 20 of 48 for “"Reservoir conditions"”.
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Phase Behaviour and Mass Transfer of Solvent(s)-CO2-Heavy Oil Systems Under Reservoir Conditions
… of the solvent(s)-CO2-heavy oil systems under reservoir conditions. In order to improve the phase behaviour modeling of highly asymmetric systems, e.g., solvent(s)-CO2-heavy oil systems, a new alpha function for the Peng-Robinson equation of state (PR EOS) is first developed. In comparison with …
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Nonequilibrium phase Behaviour and Mass Transfer of Alkane Solvents(s)-CO2-Heavy Oil Systems Under Reservoir Conditions
… artificially induce foamy oil flow in heavy oil reservoirs by dissolution with injected gases (e.g., CO2 and alkane solvents), which is characterized by time-dependent (i.e., nonequilibrium) phase behaviour. The entrained gas bubbles in the heavy oil are considered as the main mechanism …
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Mass Transfer of Alkane Solvents-CO2-Heavy Oil Systems in the Absence and Presence of Porous Media Under Reservoir Conditions
For a thin heavy oil reservoir where thermal methods are not applicable due to heat loss to over- and under-burdens, gas injection is considered to be an effective alternative. One of the major mechanisms associated with gas injection is the molecular diffusion of dissolved gas(es) which reduce the …
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Application of Foam for Mobility Control in Enhanced Oil Recovery (EOR) Process
… investigation of foam for mobility control at reservoir conditions. The adsorption of cationic surfactants on natural minerals was discussed in a separate chapter, although it is one aspect for evaluating surfactant formulations. A numerical model was used to fit the foam strength for foam …
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Fracture Stimulation by Nano-assisted Foam-based Fluids in High-Temperature Reservoirs
… initiate and propagate fractures at the target reservoir interval. Proppants, such as coated sands and ceramic, are mixed within the fracturing fluid and distributed inside the fractures to keep the fractures open and maintain the conductive pathways for oil and gas flows. Therefore, fracturing …
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Basic relation for the recovery of oil by steam application to an oil and hot water system
… displacement was solved numerically for typical reservoir conditions. Heat losses to the overlying and underlying formations were included, and certain simplifying assumptions were made to facilitate numerical treatment of the problem by the method of characteristics. General trends of the …
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Low Interfacial Tension Foam Miscible Ethane Oil Recovery in Low Permeability Harsh Environments
… the presence of oil and Type I microemulsion in reservoir brine was identified to be thermally stable at reservoir conditions. Subsequent foam quality and coreflood displacement tests were conducted to compare the recovery efficiencies of three processes: a) gravity–unstable, miscible ethane …
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INTERFACIAL TENSION MEASUREMENT BY SESSILE DROP USING DIGITAL IMAGE PROCESSING
… flooding but requires accurate modeling of reservoir conditions and determination of interfacial tensions, IFTs. The spinning drop technique is very popular but the sessile drop method offers the advantage that it is a static system. Most previous systems required a photograph to be taken …
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Surfactants and enhanced oil recovery
… range (ii) exhibit low adsorption onto reservoir rock (iii) interfacial tension as low as 10-2mNm-1 have been subsequently optimised. Core flooding tests carried out under reservoir conditions produced an additional 20% of the original-oil-in-place.
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Transport property equations-of-state for reservior fluids and dense gas mixtures
… of viscosity and thermal conductivity at reservoir temperature and pressure of interest is required for many engineering problems that involve heat and mass transfer or pressure drop relationship. Direct experimental viscosity and thermal conductivity data are usually not available at …
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Experimental Simualtion Of Hot Fluid Injection Process for In-reservoir Upgrading
… via steam to reduce bitumen’s viscosity in the reservoir so it flows easily to the surface. A high heat capacity fluid could eventually replace steam in this role. Vacuum Residue (VR) is the heaviest, most viscous and richest in contaminants amongst the different bitumen fractions, thus is the …
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On Steam Based Recovery Process Design
… process for bitumen production from oil sands reservoirs. The most used thermal methods are Steam Flooding (SF), Cyclic Steam Stimulation (CSS), and Steam Assisted Gravity Drainage (SAGD). The choice of method depends on the geology, initial reservoir conditions, and the viscosity of the oil. …
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Experimental Studies on Solvent Screening and Performance Analysis for Bitumen Recovery Using ES-SAGD
… of highly viscous bitumen from oil sands reservoirs requires energy-intensive in-situ thermal methods, notably Steam-Assisted Gravity Drainage (SAGD). While SAGD is commercially proven, it is limited by a high Steam-to-Oil Ratio (SOR) and substantial environmental impact. The Expanding …
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Methods and systems for ballooned hydraulic fractures and complex toe-to-heel flooding
… from both conventional and unconventional reservoirs is very low. The hydrocarbon recovery factor for conventional reservoirs is typically between 5% and 15% after primary recovery and between 35% and 45% after secondary recovery. The hydrocarbon recovery factor for organic shale reservoirs …
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Acoustic monitoring of hydraulic stimulation in granites
… fracture stimulation of low permeability EGS reservoir rock is widely employed to develop this resource and is generally required to make unconventional resources an economically viable resource. Significant challenges for EGS technology include poor connectivity between injection and …
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Modeling of Methane and Carbon Dioxide Sorption Capacity in Tight Reservoirs Using Machine Learning (ML) Techniques
… shale and coal have been measured at different reservoir conditions. High-accuracy “integrated” shallow and deep learners/predictors were developed, without splitting the dataset into several batches. The best predictors were Random Forest Regressor (RFR) and Artificial Neural Network (ANN) with …
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Oil reservoir characterization using ensemble data assimilation
… oilfields that provide real-time measurements of reservoir conditions. These measurements can be used for more frequent reservoir model calibration and characterization that can lead to improved oil recovery though model-based closed-loop control and management. This thesis proposes an efficient …
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Screening guidelines and data analysis for the application of in-situ polymer gels for injection well conformance improvement
… selecting a proper gel technology for a given reservoir is a challenging task for reservoir engineers because of the associated geological and technical complexities and the absence of efficient screening tools.</p><p>A comprehensive review for the worldwide gel field projects was conducted to …
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A Decision Support System for Indirect Potable Reuse Based on Integrated Modeling
… water constitutes a major portion of the reservoir's safe yield. It requires timely and informed decision-making in response to the fluctuating operational conditions, e.g., weather patterns, plant performance, water demand, etc. Advanced integrated modeling techniques can be used to …
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