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 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.

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. 

Shear Studies on Polymer Flooding Systems with High Concentrations

2012 ◽  
Vol 535-537 ◽  
pp. 1189-1192 ◽  
Author(s):  
Ji Gang Wang ◽  
Peng Wu ◽  
Quan Qing Du ◽  
Hui Hui Cao ◽  
Meng Sun
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Oil Recovery ◽  
Polymer System ◽  
Polymer Flooding ◽  
Displacement Efficiency ◽  
High Concentration ◽  
High Molecular Weight Polymer ◽  
Molecular Weight Polymer ◽  
High Concentrations

Abstract: When the dose level of polymer is settled, the change of injection volume and concentration do not increase oil recovery obviously, while the result of lab research shows that the increasing of oil recovery of high concentration and high molecular weight polymer flooding can reach or over that of ASP flooding. The aim of this paper is to study the shear characteristic in high concentration and high molecular weight polymer flooding, and analyzed the suitable parameter of it.They can provide the theory of high concentration Polymer flooding. In the process of polymer flooding, it was because increasing the water phase viscosit and the retention effect of polymer molecules in porous media that making oil flow degrees than improved ,the sweep volume expand, and improve the oil recovery. Study confirmed [1-3], polymer solution with sticky elastic can effectively improve the oil displacement efficiency, reduce residual oil saturation [4-5]. So, the study on the shear properties of the polymer system in high concentration (>1000mg/L) can provide experimental base for a high concentration of polymer flooding, it also has important significance on theory of polymer flooding development and application research.

Reasonable Injection Parameters for the Polymer Flooding Research in the Putaohua I1~2 Oil Layer of Xing IV Area

2014 ◽  
Vol 535 ◽  
pp. 705-708
Author(s):  
Li Jun Wang ◽  
Lin Qiang Li
Keyword(s):  
Oil Recovery ◽  
Theoretical Basis ◽  
Economic Benefit ◽  
Injection Rate ◽  
Polymer Flooding ◽  
Oil Field ◽  
Polymer Molecular Weight ◽  
Weight Concentration ◽  
Injection Parameters ◽  
Daqing Oil Field

In order to increase the oil production and ultimate recovery of Xingbei area of Daqing oil field, according to the geologic conditions of Xingbei region .The reasonable injection parameters of polymer flooding were discussed considering geologic information , experiments in lab, economic benefit . The study consists of analyzing the law governing of the remaining oil in Xingbei. By applying the methods of the combination of geological modeling and simulation for analyzing different polymer molecular weight, concentration, dosage and injection rate. concludes the influence of different injection parameters to ultimate oil recovery, This paper provides a theoretical basis and experimental support for apricot north polymer flooding of Xingbei area of Daqing oilfield .

Study on Factors Influencing the Viscosity of Polyacrylamide Solution

2012 ◽  
Vol 512-515 ◽  
pp. 2439-2442 ◽  
Author(s):  
Yan Wang ◽  
Bao Wei Su ◽  
Xue Li Gao
Keyword(s):  
Polymer Solution ◽  
Oil Recovery ◽  
Divalent Cation ◽  
Polymer Concentration ◽  
Polymer Flooding ◽  
Polyacrylamide Solution ◽  
Factors Influencing ◽  
Stirring Rate ◽  
Main Factors ◽  
Enhance Oil Recovery

Polyacrylamide (PAM) is an important polymer for oilfield flooding. The viscosity of PAM solution is very significant for polymer flooding to enhance oil recovery. The main factors which influence viscosity of PAM solution including polymer concentration, temperature, stirring rate, TDS and divalent cation ions were studied. The results showed that high stirring rate will reduce the viscosity of PAM solution; and the viscosity decreases gradually with temperature increasing; TDS and divalent cation ions also affect the viscosity of polymer solution greatly, the viscosity loss is more than 3% with the TDS increases by 1000 mg/L under the same concentration of divalent cation ions; the viscosity loss is around 20% with the concentration of divalent cation ions increase by 100 mg/L.

scholarly journals Further enhanced oil recovery by branched-preformed particle gel/HPAM/surfactant mixed solutions after polymer flooding in parallel-sandpack models

RSC Advances ◽  
2017 ◽  
Vol 7 (63) ◽  
pp. 39564-39575 ◽  
Author(s):  
Houjian Gong ◽  
Hao Zhang ◽  
Long Xu ◽  
Kangning Li ◽  
Long Yu ◽  
...  
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Polymer Flooding ◽  
Residual Oil ◽  
Preformed Particle Gel ◽  
Mixed Solutions ◽  
Enhance Oil Recovery

How to further sweep residual oil from unswept areas is crucial to enhance oil recovery after polymer flooding, which is widely used.

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