Miscible Displacement of Heavy West Sak Crude by Solvents in Slim Tube

Sharma, Akanshu; Patil, S.L.; Kamath, V.A.; Sharma, G. D.

doi:10.2118/18761-ms

Cited by 265 publications

(5 citation statements)

References 14 publications

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“…This complex phase behavior is also observed for crude oil and gas mixtures, e.g., CO 2 , methane, and enriched separator gas. The LLV equilibria occurrence was reported for light − and heavy crude oil systems, − usually under low reservoir temperatures conditions with high gas content. For these systems, the influence of LLV on crude oil recovery, , along with their proper representation by process simulators, − is still a scientific challenge.…”

Section: Introductionmentioning

confidence: 99%

Study of Liquid–Liquid and Liquid–Liquid–Vapor Equilibria for Crude Oil Mixtures with Carbon Dioxide and Methane Using Short-Wave Infrared Imaging: Experimental and Thermodynamic Modeling

et al. 2020

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In this work, phase behavior was analyzed for recombined mixtures of a Brazilian pre-salt crude oil with carbon dioxide and methane. This oil was sampled at stock tank conditions during a well-test, and mixtures with gas were prepared with a gas molar composition ranging from 20.0 to 86.0 mol %. Their phase behavior was investigated from 293.15 to 378.15 K and up to 100.0 MPa. Direct phase transition detections were achieved by using a full visibility PVT cell, coupled with a short-wave infrared camera. At this wavelength, crude oil has a lower absorbance, and it has been noted that macroscopic phase transitions can be easily detected by visual inspection. For the pseudo-binary system crude oil + carbon dioxide systems, liquid−liquid phase transitions were observed when the gas content is higher than 70.0 mol %. In addition, at the higher carbon dioxide composition, an asphaltic phase was formed at high pressures together with liquid−liquid phases. Similarly, crude oil and methane systems presented a liquid−liquid immiscibility region at methane composition above 60.0 mol % in all temperature domain studied. The Peng−Robinson equation of state was used for modeling purposes, and liquid−liquid and liquid−liquid−vapor transitions were qualitatively described. Additionally, it was observed that liquid−liquid equilibria behavior was highly dependent on the crude oil heavy fraction immiscibility because of the increasing system asymmetry by increasing mixture gas content.

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Section: Introductionmentioning

confidence: 99%

Study of Liquid–Liquid and Liquid–Liquid–Vapor Equilibria for Crude Oil Mixtures with Carbon Dioxide and Methane Using Short-Wave Infrared Imaging: Experimental and Thermodynamic Modeling

et al. 2020

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“…As stated by Sharma (1990), ЉSTD results and EOS predictions indicate that CO 2 was unable to develop dynamic miscibility with West Sak crude at reservoir pressure and temperature conditionsЉ. Ethane was miscible with the West Sak oil at 600 psi (DeRuiter), while CO 2 failed to achieve miscibility even at pressures as high as 6600 psi (Sharma 1989). In this viscous oil system, liquid ethane is far more effective as an EOR injectant than liquid CO 2 is.…”

Section: Spe-179565-msmentioning

confidence: 73%

Ethane-Based EOR: An Innovative and Profitable EOR Opportunity for a Low Price Environment

McGuire

Okuno²,

Gould

et al. 2016

SPE Improved Oil Recovery Conference

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This paper summarizes the current state of the ethane industry in the United States and explores the opportunity for using ethane for enhanced oil recovery. We show both simulation data and field examples to demonstrate that ethane is an excellent EOR injectant.After decades of research and field application, the use of CO 2 as an EOR injectant has proven to be very successful. However, there are limited supplies of low cost CO 2 available, and there are also significant drawbacks, especially corrosion, involving its use. The rich gasses and volatile oils developed by horizontal drilling and fracturing in the shale reservoirs have brought about an enormous increase in ethane production. Ethane prices have dropped substantially. In the U.S., ethane is no longer priced as a petrochemical feedstock, but is priced as fuel. Also, substantial quantities of ethane are currently being flared.Ethane-based EOR can supplement the very successful CO 2 -based EOR industry in the U.S. There simply isn't enough low-cost CO 2 available to undertake all of the potential gas EOR projects in the U.S. The current abundance of low-cost ethane presents a significant opportunity to add new gas EOR projects. The ethane-based EOR opportunity can be summarized as follows;1. CO 2 -based EOR works well, and is well understood. 2. Ethane is better than CO 2 for EOR. 3. Ethane is simpler than CO 2 for EOR. 4. Ethane is now inexpensive, and will likely stay inexpensive. 5. Ethane-based EOR has become a viable option in the Lower 48. Large volumes of low-cost ethane are available. Recent additions to the growing ethane infrastructure now deliver ethane to locations where ethane-based EOR targets are plentiful.

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“…In other words, over the years, the design of this device has been completed and fabricated in its current form. In this case, there are no perfectly standard dimensions for the slim tube apparatus. − …”

Section: Mmp Laboratory Methodsmentioning

confidence: 99%

Mini Review of Miscible Condition Evaluation and Experimental Methods of Gas Miscible Injection in Conventional and Fractured Reservoirs

2021

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Nowadays, one of the most efficient ways of enhanced oil recovery (EOR) is gas miscible injection (GMI). In GMI, minimum miscible pressure (MMP) is the most substantial parameter. The MMP can be estimated by different methods, such as laboratory methods, using the equation of states (EOS), empirical correlations, mathematical models, and artificial intelligence. Among these, laboratory methods of estimating MMP comprise slim tube displacement (STD), rising bubble apparatus (RBA), vanishing interfacial tension (VIT), X-ray computerized tomography (CT), fast fluorescence-based microfluidic (FFBM) method, magnetic resonance imaging (MRI), sonic response method (SRM), rapid pressure increase (RPI), oil droplet volume measurement (ODVM), and pressure–composition diagrams (PCDs), all of which are described in detail in this paper. Furthermore, experimental investigations performed using the mentioned laboratory methods have been presented. On the other hand, to perform miscible injection experiments in the matrix–fracture system, there are methods, such as fractured core plug (FCP), matrix–fracture system (MFS), modified core holder (MCH), and microconsolidation device (MCD), that the accomplished studies by the mentioned method have surveyed. Eventually, it can be deduced that, owing to the difference between the MMP in conventional and fractured reservoirs, a reliable method (laboratory or mathematical model) for estimating the MMP in fractured reservoirs is required.

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Miscible Displacement of Heavy West Sak Crude by Solvents in Slim Tube

Cited by 265 publications

References 14 publications

Study of Liquid–Liquid and Liquid–Liquid–Vapor Equilibria for Crude Oil Mixtures with Carbon Dioxide and Methane Using Short-Wave Infrared Imaging: Experimental and Thermodynamic Modeling

Study of Liquid–Liquid and Liquid–Liquid–Vapor Equilibria for Crude Oil Mixtures with Carbon Dioxide and Methane Using Short-Wave Infrared Imaging: Experimental and Thermodynamic Modeling

Ethane-Based EOR: An Innovative and Profitable EOR Opportunity for a Low Price Environment

Mini Review of Miscible Condition Evaluation and Experimental Methods of Gas Miscible Injection in Conventional and Fractured Reservoirs

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