scholarly journals Experimental Study on the Effect of CO2 on Phase Behavior Characteristics of Condensate Gas Reservoir

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Dali Hou ◽  
Ying Jia ◽  
Yunqing Shi ◽  
Rui Zhao ◽  
Hongming Tang ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Experimental Study ◽  
Phase Behavior ◽  
Experimental Results ◽  
Dew Point ◽  
Gas Reservoirs ◽  
Two Phase ◽  
Extraction Capacity ◽  
Gas System ◽  
Behavior Characteristics

In this paper, the DBR all-visible mercury-free high-temperature and high-pressure multifunctional formation fluid PVT analyzer developed and produced by Schlumberger company is used to conduct an experimental study on phase behavior characteristics of one offshore high CO2 condensate gas wells. The experiments include two-phase flash experiment, constant composition expansion experiment (CCE experiment), and constant volume depletion experiment (CVD experiment). Experimental results show that the higher the CO2 content in the condensate gas system, the higher the gas-oil ratio of condensate gas, the greater the density of condensate oil, the higher the dew point pressure of condensate gas, the greater the relative volume of condensate gas, the smaller the amount of retrograde condensate oil. And the higher the CO2 content in the condensate gas system, the phase diagram is shifted to the left and up, the critical point of the phase diagram is shifted to the lower left, the smaller the area of the two-phase envelope, the lighter the condensate gas system, the condensate oil recovery is higher. The above experimental results revealed that CO2 is well soluble with condensate gas, the expansion capacity of the condensate gas system was slightly enhanced, and because CO2 has a good extraction capacity, the light components of condensate gas were constantly extracted, the retrograde condensate rate of condensate oil decreases, and the maximum retrograde condensate volume also decreased. However, the condensate oil was produced along with the natural gas, and the higher the CO2 content, the stronger the extraction, the more condensate oil was produced. It is mainly because CO2 has the strong gasification and extraction capacity, on the one hand, the retrograde condensation of condensate gas was inhibited, and on the other hand, reverse evaporation of condensate oil was enhanced. The above experimental results indicate the law of the effect of CO2 on the phase behavior characteristics of condensate gas reservoirs, providing theoretical basis and guidance for the efficient development of condensate gas reservoirs at sea.

Experimental Study and Thermodynamic Modeling of Phase Equilibria in the PbO-Fe2O3 System

2016 ◽  
Vol 870 ◽  
pp. 282-285 ◽  
Author(s):  
D.A. Vinnik ◽  
Evgeny A. Trofimov ◽  
D.A. Zherebtsov
Keyword(s):  
Phase Diagram ◽  
Experimental Study ◽  
Phase Equilibria ◽  
Thermodynamic Modeling ◽  
Thermodynamic Functions ◽  
Experimental Results

In this paper the systematized literature data about the PbO-Fe2O3 system and new experimental results are presented. Based on the analysis of EDX, DTA and PXRD data on a series of compositions from 5 to 85 mol % PbO, the phase diagram of the PbO-Fe2O3 system was updated. Using the obtained data and the data of other authors thermodynamic functions were optimized and the thermodynamic modeling of the phase equilibria in the system was performed, results of which are presented in the form of the PbO-Fe2O3 phase diagram.

Effect of Capillary Pressure on Phase Behavior in Tight Rocks and Shales

2013 ◽  
Vol 16 (03) ◽  
pp. 281-289 ◽  
Author(s):  
B.. Nojabaei ◽  
R.T.. T. Johns ◽  
L.. Chu
Keyword(s):  
Phase Behavior ◽  
Capillary Pressure ◽  
Gas Flow ◽  
Dew Point ◽  
Bakken Formation ◽  
Equilibrium Equations ◽  
Two Phase ◽  
Small Pore ◽  
The Impact

Summary Phase behavior is important in the calculation of hydrocarbons in place and in the flow of phases through the rocks. Pore sizes can be on the order of nanometers for shale and tight-rock formations. Such small pores can affect the phase behavior of in-situ oil and gas because of increased capillary pressure. Not accounting for increased capillary pressure in small pores can lead to inaccurate estimates of ultimate recovery, and of saturation pressures. In this paper, capillary pressure is coupled with phase equilibrium equations, and the resulting system of nonlinear fugacity equations is solved to present a comprehensive examination of the effect of small pores on saturation pressures and fluid densities. Binary mixtures of methane with heavier hydrocarbons and a real reservoir fluid from the Bakken shale are considered. The results show that accounting for the impact of small pore throats on pressure/volume/temperature (PVT) properties explains the inconsistent gas/oil-ratio (GOR) behavior, high flowing bottomhole pressures, and low gas-flow rate observed in the tight Bakken formation. The small pores decrease bubble-point pressures and either decrease or increase dew-point pressures, depending on which part of the two-phase envelope is examined. Large capillary pressure also decreases the oil density in situ, which affects the oil formation volume factor and ultimate reserves calculations. A good history match for wells in the middle Bakken formation is obtained only after considering a suppressed bubblepoint pressure. The results show that the change in saturation pressures, fluid densities, and viscosities is highly dependent on the values of interfacial tension (IFT) (capillary pressure) used in the calculations.

Critical Condition of Cavitation Occurrence in Various Liquids

1986 ◽  
Vol 108 (4) ◽  
pp. 428-432 ◽  
Author(s):  
S. Kamiyama ◽  
T. Yamasaki
Keyword(s):  
Experimental Data ◽  
Experimental Study ◽  
Critical Condition ◽  
Reasonable Agreement ◽  
Two Phase Flow ◽  
Cavitation Number ◽  
Experimental Results ◽  
Phase Flow ◽  
Two Phase ◽  
Predicted Values

An experimental study of cavitation occurrence in benzene, kerosene, gasoline, and Freon 12 was conducted using a square-edged orifice. The experimental results of the desinent cavitation number are compared with the calculated values predicted from two-phase flow analogy. The predicted values show reasonable agreement with experimental data for benzene and gasoline but require some modifications for kerosene and Freon 12.

Simulation of Tensile Behavior in Friction Stir Welded and Superplastically Formed Titanium 6 Al-4V Alloy

2007 ◽  
Author(s):  
Paul D. Edwards ◽  
Daniel G. Sanders ◽  
M. Ramulu
Keyword(s):  
Experimental Study ◽  
Numerical Modeling ◽  
Mechanical Response ◽  
Numerical Models ◽  
Tensile Behavior ◽  
Experimental Results ◽  
Friction Stir ◽  
Modeling Approach ◽  
Simulation Results ◽  
Behavior Characteristics

A hybrid numerical and experimental study was undertaken to evaluate the performance of as Friction Stir Welded (FSW) and Superplastically Formed Friction Stir Welded (SPF-FSW) Titanium joints. This paper presents the numerical models which were developed to simulate mechanical response of as FSW and SPF-FSW joints. The simulation results were then compared to experimentally determined behavior characteristics of the joints to assess the validity of the modeling approach. It was found that the numerical modeling approach presented here have simulated successfully the tensile behavior of a FSW joint agreeing with the experimental results. This method also adequately simulated the tensile behavior of a SPF-FSW joint, but due to geometrical influences, there are discrepancies between the numerical results and experimental observations.

Solution Properties and Phase Behavior of Ammonium Hexylene Octyl Succinate in Water and Water-Oil System

1970 ◽  
Vol 3 (1) ◽  
Author(s):  
Md. Hamidul Kabir ◽  
Ravshan Makhkamov ◽  
Shaila Kabir
Keyword(s):  
Critical Micelle Concentration ◽  
Phase Behavior ◽  
Liquid Crystalline ◽  
Carbon Number ◽  
Phase Region ◽  
Solution Properties ◽  
Middle Phase ◽  
Two Phase ◽  
Lamellar Liquid Crystal ◽  
Drug Ingredient

The solution properties and phase behavior of ammonium hexylene octyl succinate (HOS) was investigated in water and water-oil system. The critical micelle concentration (CMC) of HOS is lower than that of anionic surfactants having same carbon number in the lipophilic part. The phase diagrams of a water/ HOS system and water/ HOS/ C10EO8/ dodecane system were also constructed. Above critical micelle concentration, the surfactant forms a normal micellar solution (Wm) at a low surfactant concentration whereas a lamellar liquid crystalline phase (La) dominates over a wide region through the formation of a two-phase region (La+W) in the binary system. The lamellar phase is arranged in the form of a biocompatible vesicle which is very significant for the drug delivery system. The surfactant tends to be hydrophilic when it is mixed with C10EO8 and a middle-phase microemulsion (D) is appeared in the water-surfactant-dodecane system where both the water and oil soluble drug ingredient can be incorporated in the form of a dispersion. Hence, mixing can tune the hydrophile-lipophile properties of the surfactant. Key words: Ammonium hexylene octyl succinate, mixed surfactant, lamellar liquid crystal, middle-phase microemulsion. Dhaka Univ. J. Pharm. Sci. Vol.3(1-2) 2004 The full text is of this article is available at the Dhaka Univ. J. Pharm. Sci. website

Experimental Study of Particle Size, Sound Velocity, and Resonance Phenomena in a Two-Phase Foam Flow

2001 ◽  
Vol 32 (4-6) ◽  
pp. 5
Author(s):  
A. P. Sevast'yanov ◽  
I. V. An ◽  
S. I. Vainshtein ◽  
Yu. A. Sevast'yanov ◽  
A. V. Sidnev ◽  
...  
Keyword(s):  
Experimental Study ◽  
Particle Size ◽  
Sound Velocity ◽  
Two Phase ◽  
Foam Flow ◽  
Resonance Phenomena
Sign in / Sign up

Export Citation Format

Share Document