Degradation of Polyacrylamide: A Review

2013 ◽  
Vol 800 ◽  
pp. 411-416 ◽  
Author(s):  
Luo Yi ◽  
Ke Zhi Li ◽  
De Xin Liu
Keyword(s):  
Oil Recovery ◽  
Waste Water Treatment ◽  
Economic Effects ◽  
Water Soluble ◽  
Chemical Degradation ◽  
Oil Well ◽  
Well Production ◽  
Paper Making ◽  
Oil Exploitation ◽  
Enhance Oil Recovery

Water-soluble polyacrylamide is commercially available in different domains of industry, such as water purified, paper making, pharmacy, agriculture and oil exploitation. Especially polyacrylamide is used for polymer displacement, which can enhance oil recovery through increasing the sweeping efficiency. Good economic effects are achieved by the industrial application of polymer in various oil fields. However, some problems of the oil-well production and the waste water treatment come forth with the present of polyacrylamide in the production fluid. It is maybe an efficient mean to solve it with the degradation of polyacrylamide. So, this paper reviews the lately development on the research of the degradation of polyacrylamide, especially including ultrasonic degradation, thermal degradation, biodegradation and chemical degradation.

Effects of Microbial Degradation over Heavy Oil and Oilfield Test

2012 ◽  
Vol 524-527 ◽  
pp. 49-55
Author(s):  
Zhao Yong Jiang ◽  
Ting Shan Zhang ◽  
Xiao Hui Chen ◽  
Guang Zhi Lan
Keyword(s):  
Oil Recovery ◽  
Microbial Degradation ◽  
Heavy Oil ◽  
Freezing Point ◽  
Recovery Ratio ◽  
Heavy Oils ◽  
High Recovery ◽  
Oil Exploitation ◽  
Recovery Cost ◽  
Enhance Oil Recovery

Heavy oils are abundant in resins and asphaltenes, and they have the characters of high freezing point, low flowing ability, difficult oil recovery and high recovery cost. Microbial degradation can effectively improve the properties of heavy oils and enhance oil recovery ratio. According to distinctive properties of heavy oils from different oilfields, identical microbial assemblies are sifted and incubated. Then the assemblies are used to degrade the heavy oils in oilfield. The results indicated that microbes selected could degrade resins and asphaltenes in heavy oils. Oilfield tests in Qinghai and Xinjiang Oilfield proved that microbial degradation is evident in enhancing recovery ration and is feasible and economical in heavy oil exploitation.

Residual Oil Distribution and Stimulation for SZ 36-1 Oilfield in High Water-Cut Stage

2014 ◽  
Vol 675-677 ◽  
pp. 1530-1534
Author(s):  
Biao Li ◽  
Hong Zhang
Keyword(s):  
Oil Recovery ◽  
High Water ◽  
Oil Well ◽  
Residual Oil ◽  
Oil Distribution ◽  
High Water Cut Stage ◽  
High Water Cut ◽  
Reservoir Description ◽  
Water Cut ◽  
Enhance Oil Recovery

SZ 36-1 oilfield has entered high water cut stage, and thus research on the distribution of oil is important for tapping potential in oilfield. In this paper, the distribution of residual oil of SZ 36-1 oilfield was discussed by fine reservoir description and dynamic analysis. The saturation of residual oil at faults, “died oil” between two well, the top of positive rhythm sand body and low (no) permeability interlayer is higher than other situations. We point out that infilling adjustment wells, increasing the oil well productivity and structure adjustment of produced liquid are efficient measures to enhance oil recovery for SZ 36-1 oilfield .

Conceptual Design of an In-Pipe Displacement System Applicable for Oil Well Production Column

2020 ◽  
Author(s):  
Saulo Queiroz Figliuolo ◽  
Valter Estevão Beal ◽  
Luis Alberto Breda Mascarenhas ◽  
Juan Carlos Romero Albino ◽  
Hugo Francisco Lisboa Santos
Keyword(s):  
Production Rate ◽  
Oil Recovery ◽  
Conceptual Development ◽  
Development Process ◽  
Product Development Process ◽  
Oil Well ◽  
Well Production ◽  
Deep Well ◽  
Displacement System ◽  
Efficient Power

Abstract Oil well production rate should be maintained during its lifecycle and maintenance interventions are necessary to reach this goal. Production engineer teams work on different ways to make the production stable and to enhance the oil recovery from the reservoirs. However, interventions are necessary to maintain or recover the production rate. Some problems that cause maintenance are malfunctioning/wear of equipment, clogging/obstruction and operational mistakes. These maintenances are required using expensive equipment, especially on offshore operations. In order to reduce the overall cost of interventions, robotic systems have been proposed. In this work, a conceptual development for a robotic production column well intervention system is proposed. This equipment should be strong enough to resist oil well environmental characteristics. Nowadays, the challenge involves high pressure and high temperature wells, high flow rates, a long/deep well and other very hostile features. Even though, this device has to be very slim and lightweight because it will be responsible for carrying on other systems (measurement / inspection tools, completion tools, etc.) displacing into the oil well production column. On the other hand, it needs to have highly efficient power consumption since the power availability is usually limited in the actuation environment of this autonomous equipment. In order to guarantee the achievement of the desirable requirements, the design team followed the best practices of the product development process aided by a design for lifecycle guidelines.

IMPROVING THE EFFICIENCY OF OPERATING AN OIL WELL WITH BOTTOM WATER

2021 ◽  
Author(s):  
Ильяс Азаматович Ишбулатов
Keyword(s):  
Oil Recovery ◽  
Bottom Water ◽  
Recovery Factor ◽  
Oil Well ◽  
Well Production ◽  
Oil Water ◽  
Water Cut

При разработке водонефтяных зон наблюдается образование конусов подошвенной воды, что ведет к увеличению обводненности скважинной продукции и снижению коэффициента извлечения нефти (КИН). В качестве одного из методов борьбы с данным явлением возможно применение технологии, описанной в патенте RU 2 730 163 C1. В данной статье представлены результаты моделирования данной технологии в гидроди-намическом симуляторе. During the development of oil-water zones, the formation of bottom water cones is observed, which leads to an increase in the water cut of the well production and a decrease in the oil recovery factor. As one of the methods to combat this phenomenon, it is possible to use the technology described in patent RU 2 730 163 C1. This article presents the results of modeling this technology in a hydrodynamic simulator.

scholarly journals A Case Study on the Water-Oil Interface of Shunbei Oilfield Based on Dynamic Data

Energies ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6844
Author(s):  
Hailong Liu ◽  
Fengpeng Lai
Keyword(s):  
Production Rate ◽  
Oil Recovery ◽  
Volume Ratio ◽  
Oil Wells ◽  
Sensitivity Analyses ◽  
Water Volume ◽  
Oil Well ◽  
Well Production ◽  
Steady State Method ◽  
Oil Water

Shunbei Oilfield is characterized by substantial heterogeneity and a complex oil–water relationship. The water-oil interface is dynamically changing, and it is a crucial parameter for reserve calculation and evaluation. The main purpose is to analyze the effect of fluid flow in multi-scale media on the water-oil interface. It is well known that the fracture-cavity reservoirs have well-developed fractures and karst caves, and their distribution is complex in Shunbei Oilfield. This paper presents a way to simplify the fracture-cavity system first, then uses a unit of oil wells as a system to study the water-oil interface, which avoids impact on the water-oil interface due to oil production. A detailed step by step procedure for solving the semi-analytical solution of water-oil interface in a fracture-cavity reservoir by using an explicit algorithm and a successive steady-state method is presented. The solution can be used to investigate water-oil interface behavior. In this paper, we validated this method with the actual data for a relatively similar actual reservoir. Sensitivity analyses about the effects of the main parameters including production rates, cave volume and initial oil–water volume ratio on interfacial migration velocity are also presented in detail. The water breaking time of oil wells is fully investigated. The water-oil interface movement chart under different development conditions is established to predict the water-oil interface in the late stage of oil well production and extend the waterless developing period. Being based on this chart, a water breakthrough warning can be realized, and oil recovery can be improved. The findings of the research have led to the conclusion that the rising speed of water-oil interface is proportional to the production rate, on the contrary, it is inversely proportional to cave volume and initial oil–water volume ratio. As well production goes on, the water-oil interface rises at different rates. After the well is put into production for one year, the water-oil interface rises by 16.38%, 12.56% and 4.24% according to the condition that production rate is 10%, the initial oil–water volume ratio is 0.7, and the cave volume is 100 × 104 m3. This method is not only suitable for any period and any well type in the development of Shunbei Oilfield; it also has the function of calculating the real-time water-oil interface of a single well and multi-wells. This new method has the characteristics of easy calculation and high accuracy. The method in this paper can be further developed as it has great applicability in fracture-cavity reservoirs.

A Novel Thermoviscosifying Water-Soluble Polymer for Enhancing Oil Recovery from High-Temperature and High-Salinity Oil Reservoirs

2011 ◽  
Vol 306-307 ◽  
pp. 654-657 ◽  
Author(s):  
Yu Wang ◽  
Zhi Yong Lu ◽  
Yu Gui Han ◽  
Yu Jun Feng ◽  
Chong Li Tang
Keyword(s):  
High Temperature ◽  
Oil Recovery ◽  
High Salinity ◽  
Water Soluble ◽  
Oil Reservoirs ◽  
Water Soluble Polymer ◽  
The Poor ◽  
Hydrolyzed Polyacrylamide ◽  
Increasing Temperature ◽  
Enhance Oil Recovery

Polymer flooding represents one of the most efficient processes to enhance oil recovery, but the poor thermostability and salt tolerance of the currently-used partially hydrolyzed polyacrylamide (HPAM) impeded its use in high-temperature and high-salinity oil reservoirs. “Smart” thermoviscosifying polymers (TVPs) may overcome the deficiencies of HPAM. Steady and dynamic rheological behaviors against temperature of a novel TVP were examined in this work in comparison with a commercial HPAM polymer. It was found when increasing temperature, both apparent viscosity and elastic modulus increase for TVP aqueous solution, but decrease for HPAM solution. The results indicate that TVP shows some potential to be used in enhancing oil recovery from high-temperature and high-salinity oil reservoirs.

Smart Polymers and their Applications: A Review

2017 ◽  
Vol 8 (03) ◽  
Author(s):  
Gore S. A. ◽  
Gholve S. B. ◽  
Savalsure S. M. ◽  
Ghodake K. B. ◽  
Bhusnure O. G. ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Water Soluble ◽  
Solution Temperature ◽  
Smart Polymers ◽  
Stimuli Responsive ◽  
Responsive Materials ◽  
Water Soluble Polymers ◽  
Commercial Applications ◽  
Stimuli Sensitive ◽  
External Stimuli

Smart polymers are materials that respond to small external stimuli. These are also referred as stimuli responsive materials or intelligent materials. Smart polymers that can exhibit stimuli-sensitive properties are becoming important in many commercial applications. These polymers can change shape, strength and pore size based on external factors such as temperature, pH and stress. The stimuli include salt, UV irradiation, temperature, pH, magnetic or electric field, ionic factors etc. Smart polymers are very promising applicants in drug delivery, tissue engineering, cell culture, gene carriers, textile engineering, oil recovery, radioactive wastage and protein purification. The study is focused on the entire features of smart polymers and their most recent and relevant applications. Water soluble polymers with tunable lower critical solution temperature (LCST) are of increasing interest for biological applications such as cell patterning, smart drug release, DNA sequencing etc.

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