The Experts below are selected from a list of 177 Experts worldwide ranked by ideXlab platform
Yang Haolong - One of the best experts on this subject based on the ideXlab platform.
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A New Method for Determining Original Gas in Place and Cumulative Water Influx in Waterdrive Gas Reservoirs
2013 International Conference on Computational and Information Sciences, 2013Co-Authors: Hu Junkun, Li Xiaoping, Yang HaolongAbstract:This paper presents a new method for determining original gas in place and Cumulative Water Influx in Waterdrive gas reservoirs. The new method proposed in this paper mainly comprises four procedures: firstly, using the well test analysis results of non-stablized well test which was measured under the initial condition that Waterdrive gas reservoir did not produce Water, combining with current performance data of Waterdrive gas reservoir which produces Water at present, to calculate the current effective permeability to gas in the Waterdrive gas reservoir by gas phase binomial deliverability equation of gas-Water two-phase steady state flow; secondly, using this calculated effective permeability to gas and the gas-Water relative permeability curve of reservoir, to calculate the current Water saturation; once again, using this calculated Water saturation and material balance principle for Cumulative Water Influx, to establish the relationship of the Cumulative Water Influx and original gas in place; finally, using this established relationship of the Cumulative Water Influx and original gas in place, combining with the general form of the material balance equation for Waterdrive gas reservoirs, to determine the original gas in place and Cumulative Water Influx. The example study verifies that this new method is reliable.
Iji Sunday - One of the best experts on this subject based on the ideXlab platform.
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Aquifer Detection and Characterisation Using Material Balance: A Case Study of Reservoirs A, B, C and D
2015Co-Authors: Omoniyi Omotayo Adewale, Iji SundayAbstract:Abstract: Oil and gas production needs energy, sufficient enough to drive the produced hydrocarbon to the surface of the well. Usually some of this required energy is supplied by nature. The hydrocarbon fluids are under pressure because of their depth. The gas and Water in petroleum reservoirs under pressure are the two main sources that help move oil to the well bore and sometimes up to the surface. Depending on the original characteristics of hydrocarbon reservoirs, the type of drive energy is different. The material balance equation has been a very useful tool in analyzing these mechanisms. If none of the terms in the material balance equation can be neglected, then the reservoir can be described as having a combination drive in which all possible sources of energy contribute a significant part in producing the reservoir fluids, and determining the primary recovery factor. For this to happen, the Water must be produced from an aquifer. The aquifer Water expands slightly, displacing the oil or gas from the reservoir towards the borehole as pressure drops around the borehole. Most literatures have been able to call attention to the analysis of strong and partial Water drive. This study was able to bring to light the aquifer characteristics based on weak Water drives. Knowledge of the Cumulative Water Influx is also important to the reservoir engineer. This study also goes ahead to add to aquifer detection and characterization, the Cumulative Water Influx of each reservoir. The whole proces
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Aquifer Detection and Characterisation Using Material Balance: A Case Study of Reservoirs A, B, C and D
International Journal of Science Technology and Society, 2015Co-Authors: Omoniyi Omotayo Adewale, Iji SundayAbstract:Oil and gas production needs energy, sufficient enough to drive the produced hydrocarbon to the surface of the well. Usually some of this required energy is supplied by nature. The hydrocarbon fluids are under pressure because of their depth. The gas and Water in petroleum reservoirs under pressure are the two main sources that help move oil to the well bore and sometimes up to the surface. Depending on the original characteristics of hydrocarbon reservoirs, the type of drive energy is different. The material balance equation has been a very useful tool in analyzing these mechanisms. If none of the terms in the material balance equation can be neglected, then the reservoir can be described as having a combination drive in which all possible sources of energy contribute a significant part in producing the reservoir fluids, and determining the primary recovery factor. For this to happen, the Water must be produced from an aquifer. The aquifer Water expands slightly, displacing the oil or gas from the reservoir towards the borehole as pressure drops around the borehole. Most literatures have been able to call attention to the analysis of strong and partial Water drive. This study was able to bring to light the aquifer characteristics based on weak Water drives. Knowledge of the Cumulative Water Influx is also important to the reservoir engineer. This study also goes ahead to add to aquifer detection and characterization, the Cumulative Water Influx of each reservoir. The whole process entailed analyzing reservoirs A,B,C and D using the method proposed by Cole and Campbell. The plots showed a weak Water drive for all reservoirs. The Water Influx for all the reservoirs were calculated and results obtained. The Cole and Campbell plots were proven to be more accurate method of detecting and characterizing aquifer and Water drive strength.
Yielding G. - One of the best experts on this subject based on the ideXlab platform.
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Application of material balance methods to CO2 storage capacity estimation within selected depleted gas reservoirs.
'Geological Society of London', 2017Co-Authors: Clarke A.l., Imber J., Davies R.j., Van Hunen J., Daniels S.e., Yielding G.Abstract:Depleted gas reservoirs are potential sites for CO2 storage; therefore, it is important to evaluate their storage capacity. Historically, there have been difficulties in identifying the reservoir drive mechanism of gas reservoirs using traditional P/z plots, having direct impacts for the estimation of the original gas in place (OGIP) and dependent parameters for both theoretical and effective CO2 storage capacity estimation. Cole plots have previously provided an alternative method of characterization, being derived from the gas material balance equation. We use production data to evaluate the reservoir drive mechanism in four depleted gas reservoirs (Hewett Lower Bunter, Hewett Upper Bunter, and North and South Morecambe) on the UK Continental Shelf. Cole plots suggest that the North Morecambe and Hewett Upper Bunter reservoirs experience moderate Water drive. Accounting for Cumulative Water Influx into these reservoirs, the OGIP decreases by up to 20% compared with estimates from P/z plots. The revised OGIP values increase recovery factors within these reservoirs; hence, geometrically based theoretical storage capacity estimates for the North Morecambe and Hewett Upper Bunter reservoirs increase by 4 and 30%, respectively. Material balance approaches yield more conservative estimates. Effective storage capacity estimates are between 64 and 86% of theoretical estimates within the depletion drive reservoirs, and are 53 – 79% within the Water drive reservoirs
Graham Yielding - One of the best experts on this subject based on the ideXlab platform.
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Application of material balance methods to CO2 storage capacity estimation within selected depleted gas reservoirs
Petroleum Geoscience, 2017Co-Authors: Amy L. Clarke, Jonathan Imber, Richard J. Davies, J. Van Hunen, Susie E. Daniels, Graham YieldingAbstract:Depleted gas reservoirs are potential sites for CO 2 storage; therefore, it is important to evaluate their storage capacity. Historically, there have been difficulties in identifying the reservoir drive mechanism of gas reservoirs using traditional P / z plots, having direct impacts for the estimation of the original gas in place (OGIP) and dependent parameters for both theoretical and effective CO 2 storage capacity estimation. Cole plots have previously provided an alternative method of characterization, being derived from the gas material balance equation. We use production data to evaluate the reservoir drive mechanism in four depleted gas reservoirs (Hewett Lower Bunter, Hewett Upper Bunter, and North and South Morecambe) on the UK Continental Shelf. Cole plots suggest that the North Morecambe and Hewett Upper Bunter reservoirs experience moderate Water drive. Accounting for Cumulative Water Influx into these reservoirs, the OGIP decreases by up to 20% compared with estimates from P / z plots. The revised OGIP values increase recovery factors within these reservoirs; hence, geometrically based theoretical storage capacity estimates for the North Morecambe and Hewett Upper Bunter reservoirs increase by 4 and 30%, respectively. Material balance approaches yield more conservative estimates. Effective storage capacity estimates are between 64 and 86% of theoretical estimates within the depletion drive reservoirs, and are 53 – 79% within the Water drive reservoirs. Supplementary material: A more detailed description of the aquifer modelling is available at https://doi.org/10.6084/m9.figshare.c.3803770.v1
Hu Junkun - One of the best experts on this subject based on the ideXlab platform.
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A New Method for Determining Original Gas in Place and Cumulative Water Influx in Waterdrive Gas Reservoirs
2013 International Conference on Computational and Information Sciences, 2013Co-Authors: Hu Junkun, Li Xiaoping, Yang HaolongAbstract:This paper presents a new method for determining original gas in place and Cumulative Water Influx in Waterdrive gas reservoirs. The new method proposed in this paper mainly comprises four procedures: firstly, using the well test analysis results of non-stablized well test which was measured under the initial condition that Waterdrive gas reservoir did not produce Water, combining with current performance data of Waterdrive gas reservoir which produces Water at present, to calculate the current effective permeability to gas in the Waterdrive gas reservoir by gas phase binomial deliverability equation of gas-Water two-phase steady state flow; secondly, using this calculated effective permeability to gas and the gas-Water relative permeability curve of reservoir, to calculate the current Water saturation; once again, using this calculated Water saturation and material balance principle for Cumulative Water Influx, to establish the relationship of the Cumulative Water Influx and original gas in place; finally, using this established relationship of the Cumulative Water Influx and original gas in place, combining with the general form of the material balance equation for Waterdrive gas reservoirs, to determine the original gas in place and Cumulative Water Influx. The example study verifies that this new method is reliable.
