Dissolution Characteristics of Hydrophobically Associating Polyacrylamide in Stirred Tanks

Zhou, Guozhong; Xie, Minghui; Liu, Min; Wu, Huaxiao; Long, Xiang‐li; Yu, Peng

doi:10.1016/s1004-9541(08)60339-0

Cited by 10 publications

(2 citation statements)

References 10 publications

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“…Due to the high viscosity of crude oil, strong formation shear capacity [2,17], and high mineralization of formation water in offshore fields such as Bohai [18], hydrophobic associative polymer AP-P4 can better meet the needs of viscosity building ability [19,20], shear resistance and salt tolerance under the conditions of offshore oilfield injection and polymerization than conventional linear polymers [21][22][23]. The polymer dispensing system used in onshore fields is no longer suitable due to the large volume of single well dispensing in offshore fields [24,25], the limited space and carrying capacity of offshore platforms [2,26], and the long dissolution time of polymers [27,28].…”

Section: Introductionmentioning

confidence: 99%

Exploration of Super-Gravity Rapid Dissolution Method of Polymer for Offshore Oil Repellent

Zheng

Luo

et al. 2022

Processes

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The long dissolution time and large dispensed volumes of oil repellent polymers in offshore oil fields lead to a great increase in the volume and number of dissolution and maturation tanks in the polymer formulation system. However, there is limited space and load-bearing capacity at the offshore platform and only a small space is available for the dispensing system. To further optimize the polymer dispensing system and reduce its floor space, the super-gravity technology may be considered as a way to speed up the dissolution of the polymer. The mechanism of super-gravity rapid dissolution was investigated by establishing mathematical models and with indoor experiments. The effects of filler pore size and super-gravity factor on polymer dissolution time and solution viscosity were investigated using the super-gravity rapid dissolution device, then combined with established graded forced stretching devices for field magnification experiments. The results indicated that the super-gravity method can substantially shorten the polymer dissolution time. The basic dissolution time of the polymer AP-P4 was shortened by 35 min compared with the conventional formulation method after use of the super-gravity rapid dissolution device. The optimal process conditions for the preparation of polymer solution by the super-gravity rapid dissolution device were selected as the optimal super-gravity factor range of 1031~1298.

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Section: Introductionmentioning

confidence: 99%

Exploration of Super-Gravity Rapid Dissolution Method of Polymer for Offshore Oil Repellent

Zheng

Luo

et al. 2022

Processes

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“…The polymer dissolution injection process of a platform in Suizhong 36-1 oilfield is taken as an example. Polymer dissolution is divided into two steps [27][28][29]: (1) the first step is to disperse and dissolve to prepare 5000 mg/L polymer solution, which is further dissolved in the maturing tank. The dissolution time of the whole process is 30 min, which can basically meet the initial dissolution conditions of this concentration of polymer; (2) the second step is to further dilute the polymer to 1750 mg/L, in which the polymer mother liquor is mixed with the dilution water in the high-pressure injection manifold.…”

Section: Introductionmentioning

confidence: 99%

Optimization Design and Analysis of Polymer High Efficiency Mixer in Offshore Oil Field

et al. 2020

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The degree of polymer-water mixing in high-pressure pipelines on offshore oilfields usually influences the polymer solution’s performance. To realize efficient mixing of the polymer mother liquor with dilution water in the high-pressure pipeline, a high-efficiency mixer is designed and optimized. The designed mixer consists of four parts: a T-shaped pipe as the main body, an inlet flow-splitting plate, a stainless-steel flow-guiding tube, and an outlet flow-splitting plate. Mathematical models are built by using computational fluid dynamics (CFD) and the mixing effects are compared by using Fluent. The research results show that compared with conventional T-shaped mixers, the designed high-efficiency mixer has better mixing performance and increases the mixing rate to 80%. To optimize the mixing rate, the length of the stainless-steel tube is increased and the tube is perforated to guide the flow. The result shows that boring holes along straight lines around the tube can achieve good optimization effect and increase the mixing rate to 95%. The designed high-efficiency mixer can effectively improve the dissolving efficiency and solve problems in polymer-water mixing in the high-pressure pipeline.

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Accelerating Dissolution of Polyacrylamide in Offshore Oil Field

Zhang

et al. 2015

Bulletin Korean Chem Soc

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The solubility of polyacrylamide significantly reduces the efficiency of polymer flooding in offshore oil fields, because of the low performance of polyacrylamide and the special environment. The objective of this paper is to investigate a novel approach to accelerate the dissolution of hydrolyzed polyacrylamide (HPAM) by adding a co‐solvent cholamine (MEA). We investigated the effects of MEA on the microstructure and the performance of HPAM. Results showed that the addition of MEA and the temperature rise greatly shortened the dissolution time of HPAM, while improved the rheological property and seepage behavior. The enhanced solubility of polyacrylamide and the performance of polymer solution can be attributed to the enlarging of the molecular clew size, the stretching of molecular chains and the lowering of the glass transition temperature of HPAM. The new approach has high practical and the economic values for applications of the polymer flooding technology in offshore oilfields with complex reservoir conditions.

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Dissolution Characteristics of Hydrophobically Associating Polyacrylamide in Stirred Tanks

Cited by 10 publications

References 10 publications

Exploration of Super-Gravity Rapid Dissolution Method of Polymer for Offshore Oil Repellent

Exploration of Super-Gravity Rapid Dissolution Method of Polymer for Offshore Oil Repellent

Optimization Design and Analysis of Polymer High Efficiency Mixer in Offshore Oil Field

Accelerating Dissolution of Polyacrylamide in Offshore Oil Field

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