Investigation into the properties of water-in-heavy oil emulsion and its role in enhanced oil recovery during water flooding

With the continuous exploitation of most reservoirs in China, the proportion of heavy oil reservoirs increases, and the development difficulty is greater than that of conventional reservoirs. In view of the important subject of how to improve the recovery factor of heavy oil reservoir, the thermal recovery technology (hot water flooding, steam flooding, steam assisted gravity drainage SAGD and steam huff and puff) and cold recovery technology (chemical flooding, electromagnetic wave physical flooding and microbial flooding) used in the development of heavy oil reservoir are summarized. The principle of action is analyzed, and the main problems restricting heavy oil recovery are analyzed The main technologies of heavy oil recovery are introduced from the aspects of cold recovery and hot recovery. Based on the study of a large number of literatures, and according to the development trend of heavy oil development, suggestions and prospects for the future development direction are put forward.

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Effect of pressure variation on polymer flooding

10.32920/ryerson.14663814 ◽

2021 ◽

Author(s):

Ahmad Ali Manzoor

Keyword(s):

Polymer Solution ◽

Enhanced Oil Recovery ◽

Oil Recovery ◽

Heavy Oil ◽

Constant Pressure ◽

Maximum Pressure ◽

Core Flooding ◽

Sweep Efficiency ◽

Black Oil Model ◽

Original Oil In Place

Chemical-based enhanced oil recovery (EOR) techniques utilize the injection of chemicals, such as solutions of polymers, alkali, and surfactants, into oil reservoirs for incremental recovery. The injection of a polymer increases the viscosity of the injected fluid and alters the water-to-oil mobility ratio which in turn improves the volumetric sweep efficiency. This research study aims to investigate strategies that would help intensify oil recovery with the polymer solution injection. For that purpose, we utilize a lab-scale, cylindrical heavy oil reservoir model. Furthermore, a dynamic mathematical black oil model is developed based on cylindrical physical model of homogeneous porous medium. The experiments are carried out by injecting classic and novel partially hydrolyzed polyacrylamide solutions (concentration: 0.1-0.5 wt %) with 1 wt % brine into the reservoir at pressures in the range, 1.03-3.44 MPa for enhanced oil recovery. The concentration of the polymer solution remains constant throughout the core flooding experiment and is varied for other subsequent experimental setup. Periodic pressure variations between 2.41 and 3.44 MPa during injection are found to increase the heavy oil recovery by 80% original-oil-in-place (OOIP). This improvement is approximately 100% more than that with constant pressure injection at the maximum pressure of 3.44 MPa. The experimental oil recoveries are in fair agreement with the model calculated oil production with a RMS% error in the range of 5-10% at a maximum constant pressure of 3.44 MPa.

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Oxidation of Heavy Oil Using Oil-Dispersed Transition Metal Acetylacetonate Catalysts for Enhanced Oil Recovery

Energy & Fuels ◽

10.1021/acs.energyfuels.1c03434 ◽

2021 ◽

Author(s):

Meisam Babapour Golafshani ◽

Mikhail A. Varfolomeev ◽

Seyedsaeed Mehrabi-Kalajahi ◽

Nikolay O. Rodionov ◽

Pooya Tahay ◽

...

Keyword(s):

Transition Metal ◽

Enhanced Oil Recovery ◽

Oil Recovery ◽

Heavy Oil ◽

Metal Acetylacetonate

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Microfluidics experimental investigation of the mechanisms of enhanced oil recovery by low salinity water flooding in fractured porous media

Fuel ◽

10.1016/j.fuel.2021.123067 ◽

2022 ◽

Vol 314 ◽

pp. 123067

Author(s):

Atena Mahmoudzadeh ◽

Mobeen Fatemi ◽

Mohsen Masihi

Keyword(s):

Experimental Investigation ◽

Porous Media ◽

Enhanced Oil Recovery ◽

Oil Recovery ◽

Fractured Porous Media ◽

Water Flooding ◽

Low Salinity ◽

Low Salinity Water ◽

Salinity Water

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A mechanistic investigation of low salinity water flooding coupled with ion tuning for enhanced oil recovery

RSC Advances ◽

10.1039/d0ra08301a ◽

2020 ◽

Vol 10 (69) ◽

pp. 42570-42583

Author(s):

Rohit Kumar Saw ◽

Ajay Mandal

Keyword(s):

Enhanced Oil Recovery ◽

Oil Recovery ◽

Water Flooding ◽

Wettability Alteration ◽

Rock Surface ◽

Calcite Dissolution ◽

Low Salinity ◽

Low Salinity Water ◽

Mechanistic Investigation ◽

Salinity Water

The combined effects of dilution and ion tuning of seawater for enhanced oil recovery from carbonate reservoirs. Dominating mechanisms are calcite dissolution and the interplay of potential determining ions that lead to wettability alteration of rock surface.

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