Can hot water injection with chemical additives be an alternative to steam injection: Static and dynamic experimental evidence

Du, Xuan; Liu, Tong; Xi, Changfeng; Wang, Bojun; Qi, Zongyao; Zhou, You; Xu, Jiacheng; Lin, Lixing; Istratescu, Georgeta; Babadagli, Tayfun; Li, Huazhou

doi:10.1016/j.fuel.2022.125751

Cited by 9 publications

(3 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The initial development phase in China included natural depletion mining and water flooding mining, resulting in a significant deficiency in formation energy and waterflooding causing heavy-scale precipitation [ 4 ]. The current approach to enhanced oil recovery primarily involves the combination of horizontal well fracturing, water flooding enhancement, and various auxiliary techniques [ 5 , 6 ]. The utilization of gas flooding has gradually gained global recognition among scientists due to its abundant sources, diverse composition, and effective maintenance of formation pressure.…”

Section: Introductionmentioning

confidence: 99%

Application of Polymeric CO2 Thickener Polymer-Viscosity-Enhance in Extraction of Low-Permeability Tight Sandstone

Fu,

Song,

Pan

et al. 2024

Polymers

View full text Add to dashboard Cite

The conventional production technique employed for low-permeability tight reservoirs exhibits limited productivity. To solve the problem, an acetate-type supercritical carbon dioxide (scCO2) thickener, PVE, which contains a large number of microporous structures, was prepared using the atom transfer radical polymerization (ATRP) method. The product exhibited an ability to decrease the minimum miscibility pressure of scCO2 during a solubility test and demonstrated a favorable extraction efficiency in a low-permeability tight core displacement test. At 15 MPa and 70 °C, PVE-scCO2 at a concentration of 0.2% exhibits effective oil recovery rates of 5.61% for the 0.25 mD core and 2.65% for the 5 mD core. The result demonstrates that the incorporation of the thickener PVE can effectively mitigate gas channeling, further improve oil displacement efficiency, and inflict minimal damage to crude oil. The mechanism of thickening was analyzed through molecular simulation. The calculated trend of thickening exhibited excellent agreement with the experimental measurement rule. The simulation results demonstrate that the contact area between the polymer and CO2 increases in direct proportion to both the number of thickener molecules and the viscosity of the system. The study presents an effective strategy for mitigating gas channeling during scCO2 flooding and has a wide application prospect.

show abstract

Section: Introductionmentioning

confidence: 99%

Application of Polymeric CO2 Thickener Polymer-Viscosity-Enhance in Extraction of Low-Permeability Tight Sandstone

Fu,

Song,

Pan

et al. 2024

Polymers

View full text Add to dashboard Cite

show abstract

“…There is also a viscosity reducing chemical flooding, which increases water viscosity while reducing oil viscosity, achieving the goal of improving mobility ratio. On the one hand, the principle of thermal viscosity reduction is used to add chemical agents into hot water to achieve the goal of reducing the viscosity of crude oil through hot water chemical flooding. , This technology has the advantages of high sweep efficiency and low heat loss, but like thermal recovery, it is limited by factors such as well spacing. On the other hand, amphiphilic polymers that utilize chemical viscosity reduction typically introduce amphiphilic groups onto the polyacrylamide backbone. , The introduction of hydrophobic groups can enable polymer molecules to form supramolecular aggregates through hydrophobic association, resulting in stronger viscosity capacity and shear resistance in solutions compared to general water-soluble polymers.…”

Section: Introductionmentioning

confidence: 99%

“…On the one hand, the principle of thermal viscosity reduction is used to add chemical agents into hot water to achieve the goal of reducing the viscosity of crude oil through hot water chemical flooding. 17,18 This technology has the advantages of high sweep efficiency and low heat loss, but like thermal recovery, it is limited by factors such as well spacing. On the other hand, amphiphilic polymers that utilize chemical viscosity reduction typically introduce amphiphilic groups onto the polyacrylamide backbone.…”

Section: Introductionmentioning

confidence: 99%

Hyperbranched Copolymer as a Viscosity Reducer for Offshore Heavy Oil: From Optimization to Application

Chen

Shi

et al. 2023

Energy Fuels

View full text Add to dashboard Cite

This paper discussed the selection of functional monomers and optimal synthesis conditions for hyperbranched copolymer named as HVR, a novel polymer flooding chemical, intended to enhance offshore heavy oil recovery. The potential application of HVR as a polymer for oil displacement was also evaluated. Through experiments and molecular simulations, functional monomers AOS and OP-10 for Bohai heavy oil were screened out due to their high viscosity reduction rates for oil, both above 90%. Moreover, the interaction energy calculation results suggested that AOS and OP-10 were more likely to spontaneously disperse asphaltene aggregation. Furthermore, the influence of various factors on the synthesis of HVR was discussed using orthogonal design, and optimal synthesis conditions were determined. The optimal conditions for HVR synthesis are as follows: polymerization concentration of 30 wt %, initiator dosage of 1 wt %, initiation temperature of 50 °C, and system pH of 7; the sum of OP-10 and AOS accounts for 29.9 wt %, with a molar ratio of 1:1; the total amount of AM and AA accounts for 79.9 wt %, with a mole ratio of 6.5:3.5; and 3.0 G PAMAM accounts for 0.2 wt %. Moreover, HVR demonstrated good mobility control capacity and improved the recovery of heavy oil significantly in core flooding tests. Injecting a slug of 0.3 PV of HVR led to the additional recovery of 21.96 and 16.04% for oil viscosities of 350 and 500 cP, respectively. Notably, HVR’s additional recovery was over 7% higher than that of conventional hydrophobically associating polymer. These findings highlight the potential of HVR as a novel polymer to enhance the heavy oil recovery.

show abstract

Development of a simple and efficient oil-soluble nanocatalytic system for aquathermolysis upgrading of heavy crude oil

Kholmurodov

Tajik

Farhadian

et al. 2023

Fuel

View full text Add to dashboard Cite

Can hot water injection with chemical additives be an alternative to steam injection: Static and dynamic experimental evidence

Cited by 9 publications

References 30 publications

Application of Polymeric CO2 Thickener Polymer-Viscosity-Enhance in Extraction of Low-Permeability Tight Sandstone

Application of Polymeric CO2 Thickener Polymer-Viscosity-Enhance in Extraction of Low-Permeability Tight Sandstone

Hyperbranched Copolymer as a Viscosity Reducer for Offshore Heavy Oil: From Optimization to Application

Development of a simple and efficient oil-soluble nanocatalytic system for aquathermolysis upgrading of heavy crude oil

Contact Info

Product

Resources

About