Study on dynamic characteristics of polymer flooding and factors affecting oil displacement effect

2019 ◽  
Author(s):  
Guohong Liu
Keyword(s):  
Dynamic Characteristics ◽  
Polymer Flooding ◽  
Displacement Effect ◽  
Factors Affecting ◽  
Oil Displacement

Experimental Study on the Displacement Performance of Heat-Resistant Polymer

2014 ◽  
Vol 675-677 ◽  
pp. 1495-1499 ◽  
Author(s):  
Tao Ping Chen ◽  
Biao Qiu
Keyword(s):  
Polymer Flooding ◽  
Displacement Efficiency ◽  
Oil Viscosity ◽  
Permeability Ratio ◽  
Ratio Increase ◽  
Displacement Effect ◽  
Oil Displacement ◽  
Heat Resistant ◽  
Homogeneous Core ◽  
Oil Displacement Efficiency

The displacement performance of heat-resistant polymer is evaluated with the artificial cores and natural cores under 95°C. The best concentration of BH heat-resistant polymer is 1500 mg/L, and the best slug is 0.6 PV on the condition of the average permeability is 600×10-3μm2 of the homogeneous core and the oil viscosity is 2.3mPa • s. Under the best concentration and the PV size, BH heat-resistant polymer solution has better displacement effect for the artificial double core whose permeability ratio is less than 4. When permeability ratio exceed 4, the displacement affect no longer increase. When the mobility ratio increase from 0.05 to 0.2, for the artificial cores, the recovery of polymer flooding reduce by 3.17%, and for the natural cores, the recovery of polymer flooding reduce by 2.26%. The recovery of BH polymer that is aged for 90 days after vacuumed is 32.29%. Comparing with the fresh BH polymer, it is lower by 6.56%. That is to say that the aged BH polymer still has good oil displacement efficiency.

scholarly journals Analysis of the Influence of Gas Distribution on Flora Structure and Oil Displacement Effect During Microbial Oil Displacement

2021 ◽  
Vol 329 ◽  
pp. 01038
Author(s):  
Chenying Wang
Keyword(s):  
Industrial Production ◽  
Rapid Development ◽  
Social Economy ◽  
Petroleum Industry ◽  
Microbial Oil ◽  
Gas Distribution ◽  
Displacement Effect ◽  
Factors Affecting ◽  
Oil Displacement ◽  
Oil Production Technology

In the context of the rapid development of my country's social economy, the total demand for energy in my country's industrial production continues to increase, of which petroleum energy is an important type of energy required in industrial production. At present, China's petroleum energy mainly depends on imports, so in order to promote the productivity of China's petroleum industry, we must carry out comprehensive innovation of oil displacement technology. Microbial oil displacement is an important technical means, which needs to accurately grasp the factors affecting the oil displacement effect, so as to optimize and innovate the technology. Therefore, this paper will deeply study and analyze the influence of gas distribution on flora structure and oil displacement effect in the process of microbial oil displacement, and put forward some reasonable opinions and measures to further promote the improvement of oil production technology.

The Evaluation Experiment Research on Sp Binary Composite System Performance and the Oil Displacement Effect

2013 ◽  
Vol 807-809 ◽  
pp. 2534-2543
Author(s):  
Yang Liu ◽  
Jiu Hong Feng
Keyword(s):  
Complex System ◽  
Binary System ◽  
Oil Recovery ◽  
System Performance ◽  
Composite System ◽  
Polymer Flooding ◽  
Binary Complex ◽  
Displacement Effect ◽  
Oil Displacement ◽  
Binary Composite

SP binary composite system can reduce the interfacial tension, has good viscoelasticity, and has similar displacement effect with ASP ternary composite system. In addition, the scaling formation can be weaken because it does not contain alkali. Therefore, it plays a important role in guiding the formulas of SP binary composite system and designing the injection scheme to evaluate the main performance and oil displacement effect of SP binary composite system. Experiments on the main performance evaluation, microscopic simulation model for oil displacement and oil displacement in cores have been carried in this paper, which is intended for the new type of surfactant (HLX-BO1 type)/polymer binary complex system which is applied in SP binary composite flooding test block of Daqing oil field. The emulsification property, adsorption characteristics, stability and rheological property of the SP binary composite system have been evaluated. The oil displacement effect of polymer flooding, surfactant flooding, and SP binary composite flooding have been analyzed in this paper. The evaluation experimental research on SP binary complex system performance shows that: 1The binary composite system has good viscosity stability and interfacial tension stability. 2the emulsification time and emulsification degree both increase With the increasing of surfactant concentration. 3The higher oil content in the oil sand, the greater the surfactant adsorption capacity. 4The concentration of surfactant has less affect on the apparent viscosity of the polymer solution, while alkali has greater influence on the apparent viscosity of the polymer solution. The oil displacement experimental research on SP binary system shows that the oil displacement effect of SP binary system is significantly better than that of the unitary system of polymer or surfactant alone. The oil displacement effect is well whether SP system is flooded after water flooding or polymer flooding. The average enhanced oil recovery rates of artificial cores in the oil displacement experiment are 17.5% and 10.10% respectively. The average enhanced oil recovery rate of natural cores in the oil displacement experiment after polymer flooding is 9.5%.

INFLUENCE OF GAS-DYNAMIC TESTING RIG PIPELINES MATERIAL ON THEIR DYNAMIC CHARACTERISTICS

2021 ◽  
pp. 118-125
Author(s):  
А.В. Саврико ◽  
С.Н. Лымич ◽  
К.В. Кружаев ◽  
В.С. Левин ◽  
А.В. Москвичев
Keyword(s):  
Flow Rate ◽  
Dynamic Characteristics ◽  
Dynamic Testing ◽  
Analytical Calculation ◽  
Working Fluid ◽  
Factors Affecting ◽  
Pressure Losses ◽  
Steel Pipes ◽  
Gas Dynamic ◽  
Friction Pressure

Приведено исследование зависимости газодинамических характеристик стенда от применяемого материала трубопровода. Oсновополагающими факторами, влияющими на работоспособность стенда, являются выходные параметры - давление и расход рабочего тела, которые напрямую зависят от потерь давления на трение, создаваемого элементами стенда. Для оценки степени влияния материалов на потери стенда выбраны два вида труб: полипропиленовые и металлические. Аналитические расчёты потери давления рассматриваемых трубопроводов из различного материала показали, что трубопроводы из полипропилена предпочтительнее. Однако при проведении эксперимента получены противоположные данные, которые показали, что в полипропиленовых магистралях возможно присутствие значительного количества диафрагм: в местах пайки труб, образовавшихся в процессе изготовления. Именно этот факт способствует существенному повышению значений сопротивлений в полипропиленовых трубопроводах на 20 % по сравнению со стальными трубами, где диафрагмы отсутствуют. В результате проведения исследования был введен коэффициент, учитывающий влияние диафрагм полипропиленового трубопровода при аналитическом расчете на сопротивление. Для сохранения более точных снимаемых значений с газодинамических стендов целесообразнее использовать трубопроводы из металла, в которых рассчитать потери возможно с отклонениями до 3 % Here we give the study of the dependence of the gas-dynamic characteristics of the stand on the pipeline material used. The fundamental factors affecting the performance of the stand are the output parameters-the pressure and flow rate of the working fluid, which directly depend on the friction pressure losses created by the elements of the stand. To assess the degree of influence of materials on the losses of the stand, we selected two types of pipes: polypropylene and metal. Analytical calculations of the pressure loss of the considered pipelines made of various materials have shown that pipelines made of polypropylene are preferable. However, during the experiment, we obtained the opposite data, which showed that a significant number of diaphragms may be present in polypropylene pipelines: in the places of soldering of pipes formed during the manufacturing process. This fact contributes to a significant increase in the resistance values in polypropylene pipelines by 20 % compared to steel pipes, where there are no diaphragms. As a result of the study, we introduced a coefficient that takes into account the influence of polypropylene pipeline diaphragms in the analytical calculation of resistance. To preserve more accurate values taken from gas-dynamic stands, it is more expedient to use metal pipelines in which it is possible to calculate losses with deviations of up to 3 %

The Screening of Oil Resistant Foaming Agents and Oil Displacement Effect Evaluation of Foam Flooding

2014 ◽  
Vol 694 ◽  
pp. 354-358 ◽  
Author(s):  
Ke Liang Wang ◽  
Xue Li ◽  
Shu Jie Sun ◽  
Jin Yu Li ◽  
Yuan Yuan ◽  
...  
Keyword(s):  
Oil Recovery ◽  
High Performance ◽  
Effect Evaluation ◽  
Displacement Effect ◽  
Foaming Agents ◽  
Oil Displacement ◽  
The Poor ◽  
Gas Channeling ◽  
Foam Flooding ◽  
Low Tension

The poor oil resistance of traditional foam system leads to gas channeling and low oil recovery in the process of foam flooding field trial. Aiming at this phenomenon, a new oil resistant and low tension foam system is proposed. Firstly, dodecyl hydroxypropyl phosphate betaine and fluorocarbon 101005 were selected as oil resistant foaming agents from several high performance foaming agents. Then, mixed the two agents with low tension betaine in certain proportions to form oil resistant and low tension foam system and compared oil displacement effect with single foam system, traditional foam system and single low tension system. Experimental results show that, foam performance of oil resistant and low tension foam system is the best in the presence of oil, and the foam flooding recovery reaches to 16.10%, which is much higher than that of single foam system, traditional foam system and single low tension system.

The Effect of Following Water after Polymer Flooding on the Displacement Efficiency with Alternately Injecting Slug of Gel and Polymer/Surfactant

2013 ◽  
Vol 734-737 ◽  
pp. 1290-1293 ◽  
Author(s):  
Ji Hong Zhang ◽  
Yu Wang ◽  
Xi Ling Chen ◽  
Zi Wei Qu ◽  
Dong Ke Qin
Keyword(s):  
Polymer Flooding ◽  
Experimental Results ◽  
Compound System ◽  
Residual Oil ◽  
Displacement Efficiency ◽  
Flat Panel ◽  
Oil Displacement ◽  
Panel Model ◽  
Displacement Experiments ◽  
Polymer Surfactant

Aiming at the development of remaining oil after polymer flooding, the author develops an oil displacement technology, alternately injecting the slug of the gel and polymer/surfactant compound system, which can advanced improve the remained oil after polymer flooding. By using the artificial large flat-panel model, the oil displacement experiments are carried on to study the injection characteristics and the displacement efficiency of the alternately injecting the slug of gel and polymer/surfactant compound system, and whether the following water should be injected after polymer flooding has been discussed. The experimental results show that, the recovery of alternately injecting the gel and polymer/surfactant slug after polymer flooding could enhance recovery more than 10% on the basis of polymer flooding, the following water after polymer flooding has a little impact on the final recovery but increasing time and the difficulty of development. Therefore, these results provide the technology that alternately injecting the slug of the gel and polymer/surfactant could advance develop the residual oil and enhance the recovery after polymer flooding.

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