Study on High-Concentration Polymer Flooding To Further Enhance Oil Recovery

2006 ◽  
Author(s):  
Fulin Yang ◽  
Demin Wang ◽  
Gang Wang ◽  
Xinguang Sui ◽  
Weijie Liu ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Polymer Flooding ◽  
High Concentration ◽  
Enhance Oil Recovery

A Pilot Test of High-Concentration Polymer Flooding to Further Enhance Oil Recovery

2006 ◽  
Author(s):  
Fulin Yang ◽  
Demin Wang ◽  
Wenxiang Wu ◽  
Junzheng Wu ◽  
Weijie Liu ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Polymer Flooding ◽  
Pilot Test ◽  
High Concentration ◽  
Enhance Oil Recovery

Visco-Elastic Property Studies on Polymer Flooding Systems with High Concentrations

2012 ◽  
Vol 550-553 ◽  
pp. 834-837
Author(s):  
Ji Gang Wang ◽  
Quan Qing Du ◽  
Peng Wu ◽  
Shao Li Hu ◽  
Pan Niu
Keyword(s):  
Elastic Property ◽  
Oil Recovery ◽  
Elastic Characteristic ◽  
Polymer Flooding ◽  
Oil Field ◽  
High Concentration ◽  
Improved Oil Recovery ◽  
High Molecular Weight Polymer ◽  
Molecular Weight Polymer ◽  
Asp Flooding

Keywords: Visco-elastic property; polymer flooding; oil recovery Abstract. Polymer flooding and ASP flooding has improved oil recovery a lot in Daqing oil field. In ASP flooding, the existence of alkali decreases the visco-elastic characteristic of polymer, which decreases the oil recovery of polymer flooding. The aim of this paper was to study the visco-elastic characteristic, shear resistance in high concentration and high molecular weight polymer flooding, and analyzed the suitable parameter of it .They can provide the theory of polymer flooding development and application research.

The Research on Effect Factors of the Polymer Flooding in Low Permeability Reservoir of Daqing Oilfield

2011 ◽  
Vol 383-390 ◽  
pp. 3809-3813
Author(s):  
Yong Li Wang ◽  
Tao Li ◽  
Zhi Guo Fu ◽  
Shu Xia Liu ◽  
Bai Lin Yu ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Injection Rate ◽  
Polymer Flooding ◽  
Low Permeability ◽  
Effect Factors ◽  
Field Development ◽  
Low Permeability Reservoir ◽  
Well Pattern ◽  
Simulation Results ◽  
Enhance Oil Recovery

The pilot block is a heterogeneous reservoir with low permeability which is only 100-200(mD). Polymer flooding will be used to enhance oil recovery (EOR). Therefore, some experiment will be carried out in this pilot block .According to the simulation results, we can infer the effect factors of the polymer flooding such as concentration, injection rate, slug amounts, and well pattern. It gives us effective information for the field development plan.

Study on Formulation with Lower Initial Viscosity Gel/Alkali/Surfactant/Polymer After Polymer Flooding and Scenario Design of Field Test

2021 ◽  
Author(s):  
Cheng Jie Cheng ◽  
Bo Hai Liu ◽  
Qian Gao ◽  
Wei Yan ◽  
Lin Wen Chen ◽  
...  
Keyword(s):  
Field Test ◽  
Oil Recovery ◽  
Laboratory Experiments ◽  
Polymer System ◽  
Polymer Flooding ◽  
High Permeability ◽  
Injection Parameters ◽  
Scenario Design ◽  
Enhance Oil Recovery ◽  
Initial Viscosity

Abstract The blocks of polymer flooding have gradually entered into the stage of chase water flooding after polymer flooding in Daqing Oilfield and the comprehensive water cut is close to the exploitation limit of 98%. So it is urgent to develop some new technologies to further enhance oil recovery after polymer flooding. On the basis of laboratory research, a field test of alkali/surfactant/polymer flooding was carried out after polymer flooding in Daqing Oilfield in 2015, which achieved good development effect, but the polymer concentration was relatively large. Based on the field test of alkali/surfactant/polymer flooding, a new technology of the lower initial viscosity gel/alkali/surfactant/polymer flooding has further been studied according to the technical route combining plugging, adjusting and displacing, which can reduce the polymer dosage greatly under the premise of ensuring good oil displacing effect. In this paper, some laboratory studies are carried out, which realize significant technology breakthrough. Firstly, the adjusting and plugging agent of lower initial viscosity gel is screened out, which can be injected into the high permeability layers of low flow resistance like the water and migrate to the deep location of the high permeability layers and then gelatinize on spot. Therefore it can plug high permeability layers effectively and does not pollute the middle and low permeability layers at the same time. Secondly, the injection parameters of lower initial viscosity gel/alkali/surfactant/polymer system are optimized. The results of laboratory experiments show that the lower initial viscosity gel/alkali/surfactant/polymer system can enhance oil recovery by 13.5% OOIP under the optimal injection parameters, which is 1.2% OOIP more than that of the alkali/surfactant/polymer flooding and can save polymer dosage by 17.8%. In view of the good results obtained in laboratory experiments, the scenario design of field test is carried out and the incremental oil recovery is 10.1% OOIP predicted by numerical simulation. The field test is expected to start chemical flooding in 2021.

The Oil Displacement Mechanism of Viscoelastic of High-Concentration Polymer in Lamadian Oilfield

2014 ◽  
Vol 522-524 ◽  
pp. 1558-1561
Author(s):  
Wen Xiang Wu ◽  
Dong Zhang
Keyword(s):  
Molecular Weight ◽  
Field Test ◽  
Oil Recovery ◽  
Central Area ◽  
Polymer Flooding ◽  
High Concentration ◽  
Polymer Systems ◽  
North West ◽  
Oil Displacement ◽  
Swept Volume

The field test of high-concentration displacement is implemented in Lamadian Oilfield North West Block. The value of enhanced oil recovery in the central area is up to 20 percent or more. In order to explore the reason of good stimulation effect of high concentration polymer flooding in Lamadian Oilfield, the mechanism of high concentration polymer systems for EOR is conducted in this paper. The high concentration is characterized by the viscosity and elasticity of polymer in this article. The results showed that: the concentration of polymer with 25 million molecular weight reach to 3000mg/L, the increases value of viscoelasticity is the largest. So high-concentration polymer is defined as 3000mg/L. Compared with conventional polymer flooding, high concentration polymer has a greater ability to expand swept volume and effectiveness of wash oil.

scholarly journals Study on the Impact of Polymer Retention in Porous Media on Further Surfactant-Polymer Flood

2015 ◽  
Vol 8 (1) ◽  
pp. 45-50 ◽  
Author(s):  
Junjian Li ◽  
Hanqiao Jiang ◽  
Qun Yu ◽  
Fan Liu ◽  
Hongxia Liu
Keyword(s):  
Porous Media ◽  
Oil Recovery ◽  
Underground Water ◽  
Polymer Flooding ◽  
Polymer Flood ◽  
Good Potential ◽  
Enhance Oil Recovery ◽  
Polymer Application ◽  
The Impact ◽  
Polymer Retention

Polymer flood gains expansive popularity as a promising EOR method in various oilfields worldwide. However, there are still substantial amount of resources underground after polymer application. To further enhance oil recovery, secondary chemicals are sometimes utilized to sweep the remaining hydrocarbons to maintain the consistent development of oilfields. In this paper, a series of experiments are established and conducted to explore the feasibility of surfactant/ polymer flooding applied to a polymer flooded reservoir, and also the influence of polymer retention in porous media to enhance the oil recovery performance of subsequent chemical drive. The data of the experiments suggest that surfactant/polymer flooding owns a very good potential as a subsequent EOR technique, and that polymer retention in pores helps block underground water channels, improving greatly the sweeping efficiency of secondary chemical flood.

Polyhydroxybutyrate for Improved Oil Recovery: A Literature Review

2016 ◽  
Vol 13 (1) ◽  
pp. 39
Author(s):  
Norrulhuda Mohd Taib ◽  
Norfarisha Achim ◽  
Zulkafli Hassan
Keyword(s):  
Thermal Stability ◽  
Shear Rate ◽  
Literature Review ◽  
Oil Recovery ◽  
Polymer Flooding ◽  
Mechanical Degradation ◽  
Improved Oil Recovery ◽  
Enhance Oil Recovery ◽  
Thermal Stability Of

In this study the role of polymer flooding as one of the most efficient processes to enhance oil recovery (EOR) is discussed.  Polyhydroxybutyrate (PHB) is a bio-based polymer that has potential application for use in polymer flooding. This polymer is reviewed with particular emphasis on the effect of concentration, shear rate, salinity, hardness and temperature on polymer viscosity. Initial findings showed that PHB owned higher resistant as compared to mechanical degradation and thermal stability of HPAM as well as XG. 

scholarly journals Investigation of an Improved Polymer Flooding Scheme by Compositionally-Tuned Slugs

Processes ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 197 ◽  
Author(s):  
Ryan Santoso ◽  
Victor Torrealba ◽  
Hussein Hoteit
Keyword(s):  
Oil Recovery ◽  
Polymer Flooding ◽  
Solution Viscosity ◽  
Design Parameters ◽  
High Concentration ◽  
Sweep Efficiency ◽  
Polymer Injection ◽  
Low Salinity ◽  
Injection Scheme ◽  
Vertical Heterogeneity

Polymer flooding is an effective enhanced oil recovery technology used to reduce the mobility ratio and improve sweep efficiency. A new polymer injection scheme is investigated that relies on the cyclical injection of low-salinity, low-concentration polymer slugs chased by high-salinity, high-concentration polymer slugs. The effectiveness of the process is a function of several reservoir and design parameters related to polymer type, concentration, salinity, and reservoir heterogeneity. We use reservoir simulations and design-of-experiments (DoE) to investigate the effectiveness of the proposed polymer injection scheme. We show how key objective functions, such as recovery factor and injectivity, are impacted by the reservoir and design parameters. In this study, simulations showed that the new slug-based process was always superior to the reference polymer injection scheme using the traditional continuous injection scheme. Our results show that the process is most effective when the polymer weight is high, corresponding to large inaccessible pore-volumes, which enhances polymer acceleration. High vertical heterogeneity typically reduces the process performance because of increased mixing in the reservoir. The significance of this process is that it allows for increased polymer solution viscosity in the reservoir without increasing the total mass of polymer, and without impairing polymer injectivity at the well.

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