Measurement of gas diffusivity in heavy oils
WebMay 1, 2016 · To calculate diffusivity, t1 was set to 24 min. The time of CO 2 diffusion to the bottom of porous media was approximately 192 min, so t2 was set to 48, 96, 144, and 192 min. The fitting results of CO 2 into porous media saturated with n -tetradecane under 4000 kPa and 30 °C are shown in Fig. 3. WebNov 15, 2004 · The solvent diffusivity in heavy oil at constant temperature can be measured by using the so-called pressure decay method. In this method, the solvent diffusivity is determined by monitoring the decaying pressure of solvent phase while it is in contact with heavy oil in a closed high-pressure cell.
Measurement of gas diffusivity in heavy oils
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WebJun 11, 2013 · Results showed that the solubility of CO 2 at initial pressure of 1.73 mPa for 5000cP oil is 0.04015, and 0.04195 g/100cc for static and dynamic conditions, respectively. The diffusion coefficient value at static and dynamic condition for the same experimental condition is 4.531×10 -10 m/s 2 and 4.852×10 -10 m/s 2. WebA new technique is developed to measure the diffusivity of gas in bitumen as a function of composition. Results are presented for a carbon dioxide−bitumen system, which is of considerable industrial relevance. ... New Experimental Method for Measuring Gas Diffusivity in Heavy Oil by the Dynamic Pendant Drop Volume Analysis (DPDVA). …
WebJun 15, 2024 · In conventional methods, direct measurement is performed for the amount of gas absorbed in the oil and spatial gradient of gas concentration in oil, which leads to the … WebMay 1, 2015 · Measurement of Gas Diffusivity in Heavy Oils and Bitumens by Use of Pressure-Decay Test and Establishment of Minimum Time Criteria for Experiments May 2015 SPE Journal20(5) DOI:10.2118/170931-PA...
Effective diffusivity of CO 2 in the unconsolidated sandpack saturated with a Lloy… 22. Fy = Mole fraction of oil phase in the cell [= 1 - F y}. F = Mole fraction of gas ph… Pressure vs. gas saturation in porous media-exper- iments and simulations. tinuo… WebJan 1, 2011 · For measuring diffusivity of CH 4 in heavy oil, the initial pressure was 1,341.4 kPa for the CH 4 -heavy oil sample#1 and 1,326.2 kPa for the CH 4 -heavy oil sample#2. The variation of pressure for each experiment was recorded as a function of time while gas phase diffused into the liquid phase.
WebSep 25, 2024 · The results show that diffusion of propane in heavy oil undergoes three different stages: early region, transition region, and late-time region. The maximum diffusion coefficient is observed at the end of transition region. ... Zhang Y, Hyndman C, Maini B. Measurement of gas diffusivity in heavy oils. J Pet Sci Eng. 2000;25:37–47. Article ...
WebNMR well logging of petroleum reservoir require the measurement of the NMR response of water, oil, and gas in the pore space of rocks at elevated temperatures and pressures. The viscosity of the oil may range from less than 1 cp to greater than 10,000 cp. Also, the oil and gas are not a single component but rather a broad distribution of ... イタリアの地図はWebJul 1, 2024 · The measured thermal diffusivity data (see Fig. 1) of the oil reservoir rock sample decreases as a temperature increases from 3.614 mm 2 ⋅s −1 at room temperature (302.75 K) to 0.968 mm 2 ·s −1 at high temperatures 723.15 K. otazo tengoWebSep 15, 2024 · The experimental method was first validated using methane + hexadecane and methane + decane, and then used to measure the methane diffusion coefficients in two live oils at reservoir conditions. The obtained data were processed by compositional simulation to determine the diffusion coefficients. イタリアの地図帳WebMade available by U.S. Department of Energy Office of Scientific and Technical Information ... イタリアの家具WebIn essence, it is a constant diffusion-cell- volume technique, in which, unlike the pressure-decay meth- od, we are now able to measure the rate of gas dissolution... otazu caramel crystalWebMar 28, 2024 · A numerical method was proposed to calculate the pressure drop and the diffusion coefficient in the process of CO 2 diffusion from oil to water. The experimental results indicated that the CO 2 diffusion coefficient in oil or water increased rapidly with pressure up to the critical pressure of CO 2 and gradually slowed down thereafter. otazu amazonite calm earringsWebMade available by U.S. Department of Energy Office of Scientific and Technical Information ... イタリアの地図 印刷