The Experts below are selected from a list of 11949 Experts worldwide ranked by ideXlab platform
J. P. Courcy - One of the best experts on this subject based on the ideXlab platform.
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high pressure high temperature reservoir fluids investigation of synthetic condensate gases containing a Solid Hydrocarbon
Fluid Phase Equilibria, 1995Co-Authors: Philippe Ungerer, B Faissat, C Leibovici, H Zhou, E Behar, Gerard Moracchini, J. P. CourcyAbstract:In deep North Sea reservoirs, condensate gases have been found at high temperatures (up to 190 °C) and pressures (up to 1100 bar). Some of these methane-rich fluids are near critical and may contain significant amounts of high molecular weight Hydrocarbons. These features make it particularly difficult to study their thermodynamic behaviour, as well from an experimental as from a theoretical point of view. As such contrasted mixtures have not been extensively studied in the literature, we have also started data acquisition on synthetic mixtures. Compared with real fluids, synthetic mixtures allow indeed a more reliable test of thermodynamic models because their composition is much better controlled. Four synthetic gas condensates containing 6 or 7 components have been investigated in a visual cell to show the sensitivity of phase equilibria with respect to small quantities of heavy alkanes (nC36) and aromatics (phenanthrene). A very large sensitivity has been found, since addition of about 1% mol. of a heavy Hydrocarbon may increase dew pressures by 200 bar in some cases. Crystallization of heavy Hydrocarbons has been observed for temperatures 10–30 °C lower than pure component melting temperatures. These features have been modelled, using the Peng-Robinson equation of state for fluid phases. As a general feature, the Peng-Robinson EOS reproduces adequately the phase envelope of these fluids with regressed interaction parameters between methane and the heaviest Hydrocarbon. However, prediction of liquid dropout is unsatisfactory. A simple model of crystallization has been used to predict appearance of Solid from gas, which accounts for Solid state transitions. This model accounts fairly well for phenanthrene or nC36 crystallization at high pressure.
Artur B Stankiewicz - One of the best experts on this subject based on the ideXlab platform.
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origin properties and implications of Solid bitumen in source rock reservoirs a review
International Journal of Coal Geology, 2018Co-Authors: Maria Mastalerz, Agnieszka Drobniak, Artur B StankiewiczAbstract:Abstract This paper reviews the significance of Solid bitumen with emphasis on source-rock reservoirs. We discuss difficulties and discrepancies with terminology, especially those terms related to the origin of Solid bitumen and its physical and chemical properties. Various definitions of Solid bitumen have their own justifications and can be used provided there is clarity about which defining criteria are being considered. Difficulties in conforming to chemical-, solubility-, or origin-related definitions lead us to suggest adapting the reflectance of Solid Hydrocarbon as a practical choice for placing the boundary between Solid bitumen and pyrobitumen, and 1.50% is proposed as the boundary value. It has to be noted that this boundary may be shifted down to 1.3% for sulfur-rich kerogen. Recently, much progress has been made by combining imaging and physical adsorption techniques in porosity studies, and so the porosity of Solid bitumen is given special emphasis. Comparing pore characteristics obtained from SEM versus those generated by gas adsorption, mercury intrusion, or neutron scattering techniques indicates that the SEM pore inventory fails to account for the smallest pores ( We review the implications of the abundance of Solid bitumen on reservoir quality, porosity, permeability, and producibility, based on examples of selected sequences. One of the difficulties in predicting the influence of Solid-bitumen-bearing horizons on reservoir quality arises from the problems with detecting organic phases using various logging techniques. The use of specialized techniques such as NMR logging that allows two-dimensional T1 and T2 measurements should be expanded, and other potential techniques need to be further researched and tested. Certain aspects of the properties of Solid bitumen that are not as well understood, such as its Hydrocarbon generation potential or its role in Hydrocarbon migration are also discussed with the aim of identifying further research that could lead to a better understanding of the role that Solid bitumen plays in unconventional reservoirs.
Philippe Ungerer - One of the best experts on this subject based on the ideXlab platform.
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high pressure high temperature reservoir fluids investigation of synthetic condensate gases containing a Solid Hydrocarbon
Fluid Phase Equilibria, 1995Co-Authors: Philippe Ungerer, B Faissat, C Leibovici, H Zhou, E Behar, Gerard Moracchini, J. P. CourcyAbstract:In deep North Sea reservoirs, condensate gases have been found at high temperatures (up to 190 °C) and pressures (up to 1100 bar). Some of these methane-rich fluids are near critical and may contain significant amounts of high molecular weight Hydrocarbons. These features make it particularly difficult to study their thermodynamic behaviour, as well from an experimental as from a theoretical point of view. As such contrasted mixtures have not been extensively studied in the literature, we have also started data acquisition on synthetic mixtures. Compared with real fluids, synthetic mixtures allow indeed a more reliable test of thermodynamic models because their composition is much better controlled. Four synthetic gas condensates containing 6 or 7 components have been investigated in a visual cell to show the sensitivity of phase equilibria with respect to small quantities of heavy alkanes (nC36) and aromatics (phenanthrene). A very large sensitivity has been found, since addition of about 1% mol. of a heavy Hydrocarbon may increase dew pressures by 200 bar in some cases. Crystallization of heavy Hydrocarbons has been observed for temperatures 10–30 °C lower than pure component melting temperatures. These features have been modelled, using the Peng-Robinson equation of state for fluid phases. As a general feature, the Peng-Robinson EOS reproduces adequately the phase envelope of these fluids with regressed interaction parameters between methane and the heaviest Hydrocarbon. However, prediction of liquid dropout is unsatisfactory. A simple model of crystallization has been used to predict appearance of Solid from gas, which accounts for Solid state transitions. This model accounts fairly well for phenanthrene or nC36 crystallization at high pressure.
Maria Mastalerz - One of the best experts on this subject based on the ideXlab platform.
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origin properties and implications of Solid bitumen in source rock reservoirs a review
International Journal of Coal Geology, 2018Co-Authors: Maria Mastalerz, Agnieszka Drobniak, Artur B StankiewiczAbstract:Abstract This paper reviews the significance of Solid bitumen with emphasis on source-rock reservoirs. We discuss difficulties and discrepancies with terminology, especially those terms related to the origin of Solid bitumen and its physical and chemical properties. Various definitions of Solid bitumen have their own justifications and can be used provided there is clarity about which defining criteria are being considered. Difficulties in conforming to chemical-, solubility-, or origin-related definitions lead us to suggest adapting the reflectance of Solid Hydrocarbon as a practical choice for placing the boundary between Solid bitumen and pyrobitumen, and 1.50% is proposed as the boundary value. It has to be noted that this boundary may be shifted down to 1.3% for sulfur-rich kerogen. Recently, much progress has been made by combining imaging and physical adsorption techniques in porosity studies, and so the porosity of Solid bitumen is given special emphasis. Comparing pore characteristics obtained from SEM versus those generated by gas adsorption, mercury intrusion, or neutron scattering techniques indicates that the SEM pore inventory fails to account for the smallest pores ( We review the implications of the abundance of Solid bitumen on reservoir quality, porosity, permeability, and producibility, based on examples of selected sequences. One of the difficulties in predicting the influence of Solid-bitumen-bearing horizons on reservoir quality arises from the problems with detecting organic phases using various logging techniques. The use of specialized techniques such as NMR logging that allows two-dimensional T1 and T2 measurements should be expanded, and other potential techniques need to be further researched and tested. Certain aspects of the properties of Solid bitumen that are not as well understood, such as its Hydrocarbon generation potential or its role in Hydrocarbon migration are also discussed with the aim of identifying further research that could lead to a better understanding of the role that Solid bitumen plays in unconventional reservoirs.
E Behar - One of the best experts on this subject based on the ideXlab platform.
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high pressure high temperature reservoir fluids investigation of synthetic condensate gases containing a Solid Hydrocarbon
Fluid Phase Equilibria, 1995Co-Authors: Philippe Ungerer, B Faissat, C Leibovici, H Zhou, E Behar, Gerard Moracchini, J. P. CourcyAbstract:In deep North Sea reservoirs, condensate gases have been found at high temperatures (up to 190 °C) and pressures (up to 1100 bar). Some of these methane-rich fluids are near critical and may contain significant amounts of high molecular weight Hydrocarbons. These features make it particularly difficult to study their thermodynamic behaviour, as well from an experimental as from a theoretical point of view. As such contrasted mixtures have not been extensively studied in the literature, we have also started data acquisition on synthetic mixtures. Compared with real fluids, synthetic mixtures allow indeed a more reliable test of thermodynamic models because their composition is much better controlled. Four synthetic gas condensates containing 6 or 7 components have been investigated in a visual cell to show the sensitivity of phase equilibria with respect to small quantities of heavy alkanes (nC36) and aromatics (phenanthrene). A very large sensitivity has been found, since addition of about 1% mol. of a heavy Hydrocarbon may increase dew pressures by 200 bar in some cases. Crystallization of heavy Hydrocarbons has been observed for temperatures 10–30 °C lower than pure component melting temperatures. These features have been modelled, using the Peng-Robinson equation of state for fluid phases. As a general feature, the Peng-Robinson EOS reproduces adequately the phase envelope of these fluids with regressed interaction parameters between methane and the heaviest Hydrocarbon. However, prediction of liquid dropout is unsatisfactory. A simple model of crystallization has been used to predict appearance of Solid from gas, which accounts for Solid state transitions. This model accounts fairly well for phenanthrene or nC36 crystallization at high pressure.