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Preparation and performance evaluation of the slickwater using novel polymeric drag reducing agent with high temperature and shear resistance ability
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作者 Ming-Wei Zhao Zhen-Feng Ma +5 位作者 Cai-Li Dai WeiWu Yong-Quan Sun Xu-Guang Song Yun-Long Cheng Xiang-Yu Wang 《Petroleum Science》 SCIE EI CAS CSCD 2024年第2期1113-1121,共9页
Slickwater fracturing fluids are widely used in the development of unconventional oil and gas resources due to the advantages of low cost,low formation damage and high drag reduction performance.However,their performa... Slickwater fracturing fluids are widely used in the development of unconventional oil and gas resources due to the advantages of low cost,low formation damage and high drag reduction performance.However,their performance is severely affected at high temperatures.Drag reducing agent is the key to determine the drag reducing performance of slickwater.In this work,in order to further improve the temperature resistance of slickwater,a temperature-resistant polymeric drag reducing agent(PDRA)was synthesized and used as the basis for preparing the temperature-resistant slickwater.The slickwater system was prepared with the compositions of 0.2 wt%PDRA,0.05 wt%drainage aid nonylphenol polyoxyethylene ether phosphate(NPEP)and 0.5 wt%anti-expansion agent polyepichlorohydrindimethylamine(PDM).The drag reduction ability,rheology properties,temperature and shear resistance ability,and core damage property of slickwater were systematically studied and evaluated.In contrast to on-site drag reducing agent(DRA)and HPAM,the temperature-resistant slickwater demonstrates enhanced drag reduction efficacy at 90℃,exhibiting superior temperature and shear resistance ability.Notably,the drag reduction retention rate for the slickwater achieved an impressive 90.52%after a 30-min shearing period.Additionally,the core damage is only 5.53%.We expect that this study can broaden the application of slickwater in high-temperature reservoirs and provide a theoretical basis for field applications. 展开更多
关键词 Unconventional resources Polymeric drag reducing agent Slickwater High drag reduction rate Temperature resistance
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Syntheses and properties of associative acrylamide copolymers containing short hydrophobic chains used in a friction reducer for slick-water fracturing
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作者 Ya-Xing Dai Xian-Li Zhang +6 位作者 Si-Yuan Liu Feng-Run-Ze Zhang Yi-Xi Zhang Yu-Tong Sang Jing-Xi Zheng Zhao-Sheng Liu Peng Zhang 《Petroleum Science》 SCIE EI CAS CSCD 2024年第3期1889-1901,共13页
Two allyldimethylalkyl quaternary ammonium salt(AQAS)monomers,N,N-dimethylallylphenylpropylammonium bromide(AQAS1)and N,N-dimethylallylnonylammonium bromide(AQAS2),were synthesized and used to prepare modified polyacr... Two allyldimethylalkyl quaternary ammonium salt(AQAS)monomers,N,N-dimethylallylphenylpropylammonium bromide(AQAS1)and N,N-dimethylallylnonylammonium bromide(AQAS2),were synthesized and used to prepare modified polyacrylamide materials.Two new drag reducers were synthesized from acrylamide(AM),sodium acrylate(Na AA)and a cationic modified monomer(AQAS1 or AQAS2)via aqueous solution polymerization,and the copolymers were named P(AM/Na AA/AQAS1)and P(AM/Na AA/AQAS2),respectively.The structures of the drag reduction agents were confirmed by IR and1H NMR spectroscopies.The molecular weight(Mw)of P(AM/Na AA/AQAS1)was 1.79×10^(6)g/mol.When the copolymer concentration was 1000 mg/L and the flow rate was 45 L/min,in fresh water the highest drag reduction rate was 75.8%,in 10,000 mg/L Na Cl solution the drag reduction rate decreased to 72.9%.The molecular weight of P(AM/Na AA/AQAS2)was 3.17×10^(6)g/mol.When the copolymer concentration was500 mg/L and the flow rate was 45 L/min,the drag reduction rate reached 75.2%,and in 10,000 mg/L Na Cl solution the drag reduction rate was 73.3%,decreased by approximately 1.9%.The drag reduction rate for partially hydrolyzed polyacrylamide(HPAM)was also investigated,and the results showed that the drag reduction rates for 500 and 1000 mg/L HPAM solutions were merely 43.2%and 49.0%in brine,respectively.Compared with HPAM,both of the above copolymers presented better drag reduction capacities. 展开更多
关键词 Shale gas Slick water drag reducer Modified monomer COPOLYMERIZATION
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Synthesis and Performance of an Associative Anti-shear Drag Reducer Based on Hydrogen Bond Association of Dodecyl Methacrylate
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作者 Lu Yong Li Chenhao +5 位作者 Li Hao Chen Yue Xu Dan Wang Yiran Meng Yeqiao Zhang Xiaolai 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS CSCD 2023年第1期23-33,共11页
Using K2S2O8-Na2SO3 as the redox initiation system,a hydrogen-bond-association-based dodecyl methacrylate system associative anti-shear drag reducer was synthesised by standard emulsion polymerisation.The reaction pro... Using K2S2O8-Na2SO3 as the redox initiation system,a hydrogen-bond-association-based dodecyl methacrylate system associative anti-shear drag reducer was synthesised by standard emulsion polymerisation.The reaction process was simple and gentle as well as safe and stable.Molecular design was carried out using molecular dynamics simulation methods.The results of infrared spectroscopy,thermogravimetric analysis,differential scanning calorimetry,gel chromatography,and laser light scattering showed that the reaction polymerisation was relatively complete,the product was uniform,the molecular weight distribution was controllable,and the synthesised polymer had good flexibility.The donor lauryl methacrylate-styrene-methacrylic acid(LMA-St-MAA)and acceptor lauryl methacrylate-styrene-dimethylaminoethyl methacrylate(LMA-St-DMA)polymers had an associative intermolecular interaction force,which increased the molecular cluster size of the associative system complex.The complex had good shear resistance,and the test results of the tube pump shear test showed that the synthesised associative oil-soluble polymer drag reduction system exhibited better drag reduction rate performance than poly-α-olefins over repeated cycles.The research results provide a reference plan for minimising the number of station-to-station inputs,thereby ensuring the stability of oil pipelines and reducing transportation costs. 展开更多
关键词 drag reducer associative effect drag reduction rate shear resistance
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Preparation of Poly-α-Olefin Microcapsule Particles Coated with Polyurethane as a Drag Reducer Based on Interface Polymerization
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作者 Li Chenhao Lu Yong +6 位作者 Li Hao Chen Yue Meng Yeqiao Zhou Pengfei Xu Dan Wang Yiran Zhang Xiaolai 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS CSCD 2023年第2期101-112,共12页
The molecular behavior of polyurethane(PU)coating materials during the surface adsorption of poly-α-olefin as a drag reducing polymer was explored by a molecular dynamics simulation.Three different PU capsule wall ma... The molecular behavior of polyurethane(PU)coating materials during the surface adsorption of poly-α-olefin as a drag reducing polymer was explored by a molecular dynamics simulation.Three different PU capsule wall materials were synthesized using two reaction monomers,and a poly-α-olefin/PU drag reducer microcapsule was prepared based on interface polymerization.The structure,morphology,thermal stability,compressive strength,and drag reduction performance of the microcapsules were characterized and compared.The results showed that a non-bonding interaction induced the adsorption of the PU coating material,poly-α-olefin and PU then fused at the interface,and the PU coating material was embedded into the inner grooves of poly-α-olefin in the form of a local mosaic,thereby forming a stable core–shell structure.The morphological characterization indicated that PU and poly-α-olefin could form microcapsule structures.The thermal decomposition temperature of the microcapsule was dependent on the type of capsule wall material.The microcapsule structure had a slight effect on poly-α-olefin drag reduction.The system enabled poly-α-olefin to exist in powdered particles through microcapsulation,and had a good dispersion effect that facilitated storage and transport processes.The method effectively inhibited the accumulation and bonding of poly-α-olefin at room temperature. 展开更多
关键词 drag reducer poly-α-olefin POLYURETHANE microcapsules particles interfacial polymerization
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Synthesis and evaluation of an oil-soluble viscosity reducer for heavy oil 被引量:27
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作者 Guo Jixiang Wang Heyi +2 位作者 Chen Chaogang Chen Yun Xie Xiaohai 《Petroleum Science》 SCIE CAS CSCD 2010年第4期536-540,共5页
To reduce the viscosity of highly-viscous oil of the Tahe oilfield (Xinjiang,China),an oilsoluble polybasic copolymer viscosity reducer for heavy oil was synthesized using the orthogonal method.The optimum reaction ... To reduce the viscosity of highly-viscous oil of the Tahe oilfield (Xinjiang,China),an oilsoluble polybasic copolymer viscosity reducer for heavy oil was synthesized using the orthogonal method.The optimum reaction conditions are obtained as follows:under the protection of nitrogen,a reaction time of 9 h,monomer mole ratio of reaction materials of 3:2:2 (The monomers are 2-propenoic acid,docosyl ester,maleic anhydride and styrene,respectively),initiator amount of 0.8% (mass percent of the sum of all the monomers) and reaction temperature of 80 oC.This synthesized viscosity reducer is more effective than commercial viscosity reducers.The rate of viscosity reduction reached 95.5% at 50 oC.Infrared spectra (IR) and interfacial tensions of heavy oil with and without viscosity reducer were investigated to understand the viscosity reduction mechanism.When viscosity reducer is added,the molecules of the viscosity reducer are inserted amongst the molecules of crude oil,altering the original intermolecular structure of crude oil and weakening its ability to form hydrogen bonds with hydroxyl or carboxyl groups,so the viscosity of crude oil is reduced.Field tests of the newly developed oil-soluble viscosity reducer was carried out in the Tahe Oilfield,and the results showed that 44.5% less light oil was needed to dilute the heavy oil to achieve the needed viscosity. 展开更多
关键词 oil-soluble viscosity reducer heavy oil SYNTHESIS EVALUATION
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A high salt tolerance and low adsorption drag reducer based on non-covalent enhancement 被引量:1
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作者 MA Yingxian ZHU Zhi +4 位作者 GUO Jianchun ZHOU Han LI Jia XIONG Yujia MA Leyao 《Petroleum Exploration and Development》 2020年第6期1333-1341,共9页
To formulate fluids with flowback water,produced water directly to improve the utilization rate of recycling and reduce the adsorption damage of slick water to reservoirs,a high salt tolerance and low adsorption drag ... To formulate fluids with flowback water,produced water directly to improve the utilization rate of recycling and reduce the adsorption damage of slick water to reservoirs,a high salt tolerance and low adsorption drag reducer was designed and prepared by introducing polar cation fragments to enhance the non-covalent interactions between the chains.The drag reducer was characterized by IR and NMR.Friction resistance and viscosity tests were conducted to evaluate its salt resistance property.Static adsorption and dynamic adsorption retention tests were carried out to evaluate the damage of this reducer to shale reservoirs.The introduction of cation units into the molecular structure can weak the shielding effect of metal cations to some extent,so the drag reducer can keep a stable molecular structure and good resistant reducing performance under high salinity.The enhancement of non-covalent interaction between chains decreased the free polarity sites,further reduced the possibility of hydrogen bonding between drag reducer molecules and shale.In high salinity condition,both the adsorption capacity of the drag reducer on the shale surface and the average damage rate to the core permeability are low.Compared with the conventional salt-tolerant system,the overall liquid cost was reduced by 17%and the production per well increased by 44%.The application of this slick water system has achieved remarkable results. 展开更多
关键词 SHALE hydraulic fracturing slick water drag reducer low adsorption high salt tolerance
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Research on Emulsion Stability and Solubility of Polymer Drag Reducer
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作者 Lei Yu Weichu Yu +5 位作者 Li Jia Yadong Sun Feng Zhou Min Li Lei Zhang Wei Yin 《Open Journal of Applied Sciences》 CAS 2022年第12期1955-1967,共13页
In oilfield fracturing construction, to solve the technical problems such as poor dissolution effect and long dissolution time of polymer drag reducer powder, the rheological regulator, phase transfer agent, organic s... In oilfield fracturing construction, to solve the technical problems such as poor dissolution effect and long dissolution time of polymer drag reducer powder, the rheological regulator, phase transfer agent, organic solvent, and drag reducer powder were compounded to prepare a drag reducer emulsion that was soluble in water. The stability of the drag reducer emulsion was observed at room temperature for 90 days. The effects of the rheological regulator, phase transfer agent, and organic solvent on the stability and solubility of the drag reducer emulsion were studied. The dissolution time, dissolution effect, viscosity of the aqueous solution, and drag reduction performance of the drag reducer emulsion were evaluated. The results show the stability rate of the drag reducer emulsion prepared by MOST-1 rheological regulator, BHJ-8 and BHJ-6 compound phase inversion agent, ethylene glycol ether and 120 - 140 mesh powder can reach 97% at room temperature for 90 days. Compared with the drag reducer powder, when the aqueous solution concentration is 0.1%, the dissolution time is only 28 s, the viscosity can be increased by 30%, and the drag reduction rate can be increased by up to 8%. 展开更多
关键词 drag reducing Agent Dissolution Effect Dissolution Time Stability Rate drag reduction Rate
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Review on the applications and developments of drag reducing polymer in turbulent pipe flow 被引量:12
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作者 M.A.Asidin E.Suali +1 位作者 T.Jusnukin F.A.Lahin 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2019年第8期1921-1932,共12页
Drag reduction phenomenon in pipelines has received lots of attention during the past decades due to its potential engineering applications, especially in fluid transporting industries. Various methods to enhance drag... Drag reduction phenomenon in pipelines has received lots of attention during the past decades due to its potential engineering applications, especially in fluid transporting industries. Various methods to enhance drag reduction have been developed throughout the years and divided into two categories;non-additives method and additives method. Both categories have different types of methods, with different formulations and applications which will generally be discussed in this review. Among all the methods discussed, drag reduction using polymer additive is as one of the most enticing and desirable methods. It has been the subject of research in this field and has been studied extensively for quite some time. It is due to its ability to reduce drag up to 80% when added in minute concentrations. Reducing drag in the pipe will require less pumping power thus offering economic relieves to the industries. So, this paper will be focusing more on the use of polymer additives as drag reducing agent, the general formulations of the additives, major issues involving the use of drag reducing polymers, and the potential applications of it. However, despite the extensive works of drag reduction polymer, there are still no models that accurately explain the mechanism of drag reduction. More studies needed to be done to have a better understanding of the phenomenon. Therefore, future research areas and potential approaches are proposed for future work. 展开更多
关键词 Pipe LINES drag reduction POLYMER ADDITIVES drag reducING AGENTS
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Preparation of microencapsulatedα-olefin drag reducing polymer used in oil pipeline transportation 被引量:3
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作者 Li Bing Xing Wenguo +4 位作者 Dong Guilin Chen Xiangjun Zhou Ningning Qin Zhanbo Zhang Changqiao 《Petroleum Science》 SCIE CAS CSCD 2011年第1期99-107,共9页
Microcapsules containing oil drag-reducing polymer particles were prepared by melting-scattering and condensing of polyethylene wax,in-situ polymerization of urea and formaldehyde,and interfacial polymerization of sty... Microcapsules containing oil drag-reducing polymer particles were prepared by melting-scattering and condensing of polyethylene wax,in-situ polymerization of urea and formaldehyde,and interfacial polymerization of styrene respectively.The related processes were studied by a molecular dynamics simulation method,and molecular design of microcapsule isolation agent was carried out on the basis of the simulation.The technologies for preparing microencapsulated oil drag-reducing polymer particles were compared and the circulation drag reducing efficiency of the microencapsulated polymer particles was evaluated based on the characterization results and their dissolution properties.Molecular design of a microcapsule isolation agent suggests that a-olefin polymer particles can be stably dispersed in water by using long-chain alkyl sodium salt surfactant which can prevent the agglomeration ofα-olefin polymer particles.The results of simulation of the adsorption process shows that the amount of alkyl sodium salt surfactant can directly affect the stability of microencapsulatedα-olefin polymer particles, and there must be a minimum critical amount of it.After characterization of the morphology by Scanning Electron Microscopy(SEM) and comparison of the static pressure stability,especially the conditions of reaction and technological control of microcapsules with different shell materials,microencapsulation of a-olefin polymer particles with poly-(urea-formaldehyde) as shell material was selected as the optimum scheme,because it can react under mild conditions and its technological process can be controlled in a large range.The relationship of drag reducing rate and dissolving time of microcapsules showed that the formation of microcapsules did not affect the maximum drag reducing rate,and the drag reducing rate of each sample can reach about 35%along with the dissolving time,i.e.microencapsulation did not affect the drag reducing property ofα-olefin polymer. 展开更多
关键词 α-olefin polymer molecular design coating material microcapsule preparation stability and solubility drag reducing property
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Drag-reducing characteristics of cationic surfactant solution flow in copper pipe
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作者 朱蒙生 邹平华 +2 位作者 曹慧哲 蔡伟华 李凤臣 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2010年第6期837-841,共5页
The drag-reducing characteristics of a cationic surfactant solution flow in copper pipe have been investigated experimentally.The tested drag-reducing fluid was an aqueous solution of the cationic surfactant cetyltrim... The drag-reducing characteristics of a cationic surfactant solution flow in copper pipe have been investigated experimentally.The tested drag-reducing fluid was an aqueous solution of the cationic surfactant cetyltrimethyl ammonium chloride(CTAC).The experimental results show that the maximum drag reduction percentage reduces with the increase of fluid temperature at low concentration of CTAC,such as 100×10-6 or 150×10-6.Furthermore,the concentration and temperature changes of CTAC solution have significant influences on the drag-reducing ability.The drag-reducing effect of CTAC additives shows great potentials in the application in a district heating/cooling(DHC)system,especially for the radiant floor heating(RFH)system. 展开更多
关键词 drag-reducing characteristics cationic surfactant solution experimental study
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TRPIV measurement of turbulent coherent structures in a drag-reducing flow by polymers
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作者 Xinlei Guan Nan Jiang +1 位作者 Lu Cheng Hao Zhang 《Theoretical & Applied Mechanics Letters》 CAS 2013年第4期40-43,共4页
Fully developed turbulent flow fields with and without polymer solution at the same Reynolds number were measured by time-resolved particle image velocimetry (TRPIV) in a water channel to investigate the mechanism o... Fully developed turbulent flow fields with and without polymer solution at the same Reynolds number were measured by time-resolved particle image velocimetry (TRPIV) in a water channel to investigate the mechanism of drag-reducing solution from the view of coherent structures manipulation. The streamwise mean velocity and Reynolds stress profiles in the solution were compared with those in water. After adding the polymer solution, the Reynolds stress in the near-wall area decreases significantly. The result relates tightly to the decease of the coherent structures' bursting. The spatial topology of coherent structures during bursts has been extracted by the new mu-level criterion based on locally averaged velocity structure function. The effect of polymers on turbulent coherent structures mainly reflects in the intensity, not in the shape. In the solution, it is by suppressing the coherent structures that the wall friction is reduced. 展开更多
关键词 spatial topology of coherent structures turbulent drag-reducing flow polymer additives TRPIV
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一种具有超长侧链的疏水缔合型聚合物的合成及减阻性能评价
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作者 张亚东 敬显武 +1 位作者 刘友权 戴茜 《石油化工》 CAS CSCD 北大核心 2024年第11期1604-1610,共7页
采用曲拉通和丙烯酰氯醇解合成一种水溶性可聚合单体,仅使用水作为溶剂合成一种具有超长侧链的疏水缔合型聚丙烯酰胺(HAPAM)作为减阻剂,通过分子动力学模拟方法对比了聚丙烯酰胺、部分水解聚丙烯酰胺和合成的具有超长侧链的HAPAM与水的... 采用曲拉通和丙烯酰氯醇解合成一种水溶性可聚合单体,仅使用水作为溶剂合成一种具有超长侧链的疏水缔合型聚丙烯酰胺(HAPAM)作为减阻剂,通过分子动力学模拟方法对比了聚丙烯酰胺、部分水解聚丙烯酰胺和合成的具有超长侧链的HAPAM与水的相互作用,并分别以去离子水和盐水配液改变HAPAM含量,测量不同HAPAM含量的滑溜水在不同流速下的摩阻,并计算相应的减阻率。实验结果表明,具有超长侧链的HAPAM与水的相互作用最强;减阻率随流速的增加而增大,HAPAM含量越高,减阻率达到70%所需的流速越高,减阻率最高可达80%以上;盐对滑溜水的减阻率和黏度有显著负面影响,需提高HAPAM含量才能获得理想的减阻率;SEM表征结果显示,HAPAM在清水和盐水中的分布形态均为网状结构。 展开更多
关键词 滑溜水压裂液 疏水缔合型聚合物 减阻剂 摩阻 减阻率 网状结构
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生物柴油基减阻剂研制及滑溜水压裂液体系构建
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作者 杨明 蔡金波 +2 位作者 张莉伟 王瑞 郑存川 《油田化学》 CAS CSCD 北大核心 2024年第3期413-421,共9页
为了解决常规白油基滑溜水体系在运输过程中容易分层以及减阻剂溶解太慢、对环境污染大等问题,首先通过测试不同相对分子质量及水解度的减阻剂F1~F6的溶解性和增黏性能优选了减阻剂F4;通过对稠化剂、分散剂及固液比筛选,研制了配方为34... 为了解决常规白油基滑溜水体系在运输过程中容易分层以及减阻剂溶解太慢、对环境污染大等问题,首先通过测试不同相对分子质量及水解度的减阻剂F1~F6的溶解性和增黏性能优选了减阻剂F4;通过对稠化剂、分散剂及固液比筛选,研制了配方为34.0%生物柴油+3.0%稠化剂F-120+3.0%分散剂S-85+60.0%减阻剂F4的生物柴油基悬浮减阻剂,并将生物柴油基悬浮减阻剂与助排剂、防膨剂构建变黏滑溜水压裂液体系。实验结果表明,减阻剂F4在180℃下恒温剪切2 h后的表观黏度保留率为33.0%,热稳定性较好;变黏滑溜水压裂液具有良好的抗剪切能力和抗温性能,在剪切速率为170 s^(-1)下长期剪切后,常温下黏度保留率均可达90%以上,90℃下黏度保留率均达50%以上,其中高黏滑溜水压裂液黏度保留率可高达70%以上,低黏滑溜水压裂液的减阻率可达70%以上;高黏滑溜水压裂液的携砂性能比低、中黏滑溜水压裂液的高,且沉降速率最低,为0.005272 m/min。变黏滑溜水压裂液破胶后表面张力均小于27 m N/m,与煤油间的界面张力均小于2.0 mN/m,破胶液黏度均小于5.0mPa·s,且残渣含量均小于50 mg/L,满足标准要求。 展开更多
关键词 生物柴油 悬浮减阻剂 变黏滑溜水 压裂液 性能评价
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黏重黑土条件下马铃薯收获机挖掘装置设计与试验
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作者 吕金庆 刘金妮 +2 位作者 竹筱歆 李季成 齐钰 《东北农业大学学报》 CAS CSCD 北大核心 2024年第5期76-89,共14页
针对东北地区黏重黑土条件下马铃薯收获机工作阻力大、挖掘铲寿命短、挖掘质量难以保证等问题,将双行升运链式马铃薯收获机挖掘装置改进并设计一种分离式防堵马铃薯挖掘装置。采用理论分析研究方法,解析马铃薯收获机关键部件挖掘铲挖掘... 针对东北地区黏重黑土条件下马铃薯收获机工作阻力大、挖掘铲寿命短、挖掘质量难以保证等问题,将双行升运链式马铃薯收获机挖掘装置改进并设计一种分离式防堵马铃薯挖掘装置。采用理论分析研究方法,解析马铃薯收获机关键部件挖掘铲挖掘过程,探明影响马铃薯收获机挖掘铲工作阻力的主要影响因素;结合黏重黑土条件下马铃薯收获的农艺要求,以行驶速度、铲面铲宽和铲面倾斜角度为试验因素,以挖掘铲最大工作阻力和土壤最大压缩力为试验指标,进行多因素正交仿真试验,设计得出,挖掘铲在保证良好碎土效果且不造成马铃薯损伤的最佳参数,即行驶速度1.11 m·s^(-1),铲面铲宽150 mm,铲面倾斜角度30°时,挖掘铲最大工作阻力为566 N,土壤最大压缩力为152 N。田间验证试验表明,各项指标达到要求且均优于改进前整片式挖掘铲马铃薯收获机。 展开更多
关键词 农业机械 机械化 试验 马铃薯挖掘铲 黏重黑土 减黏减阻
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非常规油气开采压裂用减阻剂的研究现状及展望
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作者 李亭 何美琪 +2 位作者 李少明 吴清苗 赵佳乐 《科学技术与工程》 北大核心 2024年第17期7014-7023,共10页
为降低压裂施工摩阻,提高非常规储层的压裂改造效果,在系统调研国内外关于压裂用减阻剂文献的基础上,综述了减阻剂的类型和减阻机理,分析了减阻性能的影响因素,介绍了减阻剂的现场应用情况和减阻剂主要存在的问题,并提出了减阻剂未来的... 为降低压裂施工摩阻,提高非常规储层的压裂改造效果,在系统调研国内外关于压裂用减阻剂文献的基础上,综述了减阻剂的类型和减阻机理,分析了减阻性能的影响因素,介绍了减阻剂的现场应用情况和减阻剂主要存在的问题,并提出了减阻剂未来的发展方向。结果表明:目前常用的减阻剂主要存在成本高、性能不稳定、减阻机理不明确的问题;低成本、对储层伤害低、减阻性能高效的多功能型纳米复合减阻剂将是未来减阻剂研究的重点和热点。通过对减阻剂的全面研究,可为目前减阻剂性能的提升、新型减阻剂的研发和非常规油气的开采提供可行性的帮助。 展开更多
关键词 压裂 减阻剂 减阻机理 纳米复合 综述
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变体飞行器的气动与多学科设计需求
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作者 王跃 马建华 +2 位作者 韩忠华 宋文萍 杨宇 《航空科学技术》 2024年第5期15-27,共13页
变体飞行器可以通过局部或整体变形来改变飞行器的外部形状,实时适应多种任务需求,在多种飞行环境下保持气动性能最优,已经成为21世纪航空航天领域的前沿研究热点。本文首先梳理了变体飞行器的气动与总体设计、结构、控制、噪声、隐身... 变体飞行器可以通过局部或整体变形来改变飞行器的外部形状,实时适应多种任务需求,在多种飞行环境下保持气动性能最优,已经成为21世纪航空航天领域的前沿研究热点。本文首先梳理了变体飞行器的气动与总体设计、结构、控制、噪声、隐身之间的联系,然后针对变体飞行器气动设计面临的任务需求,阐述了增升减阻、稳定性和操纵性、降低气动噪声以及增强飞行器隐身性等气动与多学科设计对不同变形方式的需求,最后对变体飞行器关键技术和未来发展方向进行了展望,为变体飞行器气动与多学科设计的发展提供参考。 展开更多
关键词 变体飞行器 气动设计 增升减阻 稳定性和操纵性 降低气动噪声 增强飞行器隐身性
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低品位砂岩气藏压裂技术研究及应用——以DF109H井为例
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作者 钟森 赵祚培 +1 位作者 王淑静 杜杰 《天然气技术与经济》 2024年第4期32-36,72,共6页
四川盆地中部东峰场地区上三叠统须家河组气藏孔隙度、渗透率特低,含水饱和度高,常压,前期采用常规压裂后天然气增产及稳产效果差。为了动用该区须家河组低品位天然气储量,在新井DF109H开展了压裂技术系统化攻关,通过对减小地层伤害、... 四川盆地中部东峰场地区上三叠统须家河组气藏孔隙度、渗透率特低,含水饱和度高,常压,前期采用常规压裂后天然气增产及稳产效果差。为了动用该区须家河组低品位天然气储量,在新井DF109H开展了压裂技术系统化攻关,通过对减小地层伤害、加快返排、增大改造体积、支撑剂高效铺置等开展研究,形成了地质工程一体化紧密结合的高效压裂技术。研究结果表明:①前置液氮气体增能及水性降阻剂工作液体系,在常压致密气藏能增加返排能量,加快排液,降低储层伤害,实现天然气产能快速突破;②优选测录井甜点射孔,差异化高密度布缝,通过大排量、复合暂堵等提升人造裂缝体积,降低渗流距离,提升远端供给能力;③提升裂缝长期有效性是稳产的关键,加砂阶段伴注纤维+分散剂,采用脉冲段塞注入模式,使支撑剂铺置更为均匀。结论认为,该技术体系应用后天然气产量大幅度提升,在致密气藏显示了较好适应性,成为该区致密砂岩气藏有效开发的重要技术措施。 展开更多
关键词 砂岩气藏 水性降阻剂 高密度裂缝 支撑剂高效铺置 压裂
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耐盐性PAM-AMPS/Fe_(3)O_(4)纳米减阻剂流变性 被引量:2
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作者 秦文龙 李璐 +2 位作者 李国庆 李晗晰 秦国伟 《石油学报(石油加工)》 EI CAS CSCD 北大核心 2024年第1期137-145,共9页
采用丙烯酰胺/2-丙烯酰胺基-2-甲基丙磺酸(AM/AMPS)共聚物接枝纳米Fe_(3)O_(4)合成了一种PAM-AMPS/Fe_(3)O_(4)纳米减阻剂,并利用动态流变仪研究了PAM-AMPS/Fe_(3)O_(4)减阻剂的剪切稀释性,分析了纳米Fe_(3)O_(4)、盐含量及剪切作用对... 采用丙烯酰胺/2-丙烯酰胺基-2-甲基丙磺酸(AM/AMPS)共聚物接枝纳米Fe_(3)O_(4)合成了一种PAM-AMPS/Fe_(3)O_(4)纳米减阻剂,并利用动态流变仪研究了PAM-AMPS/Fe_(3)O_(4)减阻剂的剪切稀释性,分析了纳米Fe_(3)O_(4)、盐含量及剪切作用对其流变行为的影响规律。结果表明:PAM-AMPS/Fe_(3)O_(4)纳米减阻剂的粒径为100~500 nm、黏均分子质量为4.99×10^(6)g/mol;在30℃下,剪切速率大于0.3 s^(-1)时PAM-AMPS/Fe_(3)O_(4)减阻剂表现出显著的剪切稀释特征,该减阻剂具有更复杂的微观结构,其超临界质量分数为0.035%,相比空白聚合物表现出更优良的增黏性能和黏弹性;由于AMPS含有耐温耐盐基团,在NaCl和CaCl2质量分数分别为10%和5%的条件下,PAM-AMPS/Fe_(3)O_(4)减阻剂黏度保留率分别为69%和53%,表现出了较强的耐盐性;同时,该减阻剂在剪切速率1000 s^(-1)条件下剪切3600、7200 s后的黏度回复率分别为100%和94%,表现出良好的耐剪切性。 展开更多
关键词 减阻剂 聚丙烯酰胺 纳米Fe_(3)O_(4) 黏弹性流体 耐盐性 耐剪切性 流变行为
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工业用减阻剂对射流泵性能影响的试验研究
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作者 侯凌风 劳星胜 +2 位作者 李邦明 孙坤杰 龙新平 《排灌机械工程学报》 CSCD 北大核心 2024年第11期1091-1097,共7页
为探究减阻剂对射流泵性能的影响,进行了添加聚氧化乙烯(PEO)与阳离子聚丙烯酰胺(CPAM)2种减阻剂对射流泵性能影响的试验研究.结果表明:减阻剂的质量分数对射流泵性能的变化有决定性的作用,质量分数为(0,0.10‰]时,2种减阻剂对射流泵性... 为探究减阻剂对射流泵性能的影响,进行了添加聚氧化乙烯(PEO)与阳离子聚丙烯酰胺(CPAM)2种减阻剂对射流泵性能影响的试验研究.结果表明:减阻剂的质量分数对射流泵性能的变化有决定性的作用,质量分数为(0,0.10‰]时,2种减阻剂对射流泵性能无明显影响;质量分数为(0.10‰,0.25‰]时,部分工况的射流泵性能甚至出现下降;随着质量分数提高,射流泵性能均有一定的提升,质量分数为1.00‰~1.25‰时,射流泵性能提升达到最大,效率最大可提高6.15%;质量分数进一步提高,射流泵性能提升的幅度有所下降;相同质量分数下PEO提升射流泵性能的效果要优于CPAM;减阻剂对2个不同面积比的射流泵性能在大流量工况下提升效果更为明显,但在极限工况时,剧烈空化影响了减阻剂的效果,导致提升幅度有限;PEO在面积比1.78的射流泵中的减阻效果强于在面积比4.00的射流泵中的减阻效果,而CPAM在面积比1.78的射流泵中的减阻效果弱于在面积比4.00的射流泵中的减阻效果. 展开更多
关键词 工业用减阻剂 射流泵 高分子聚合物 减阻试验
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滑溜水压裂液用超疏水型多功能减阻剂制备及应用
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作者 冯奇 蒋官澄 +3 位作者 张朔 黄胜铭 王全得 王文卓 《钻井液与完井液》 CAS 北大核心 2024年第3期405-413,共9页
目前常规滑溜水压裂液体系普遍具有减阻、携砂、抗盐和耐温等多种功能,但均没有考虑通过改变储层表面润湿性而实现储层保护功能。因此,以丙烯酸、丙烯酰胺、自制材料2-丙烯酰胺基-2-苯基乙烷磺酸和疏水改性剂等为原料,合成了一种超疏水... 目前常规滑溜水压裂液体系普遍具有减阻、携砂、抗盐和耐温等多种功能,但均没有考虑通过改变储层表面润湿性而实现储层保护功能。因此,以丙烯酸、丙烯酰胺、自制材料2-丙烯酰胺基-2-苯基乙烷磺酸和疏水改性剂等为原料,合成了一种超疏水型多功能压裂液用减阻剂SHJZ-1。通过红外光谱仪对合成产物减阻剂结构进行表征,且通过高温高压岩心动态损害评价系统、接触角测量仪、哈克流变仪、闭合管路摩阻测试仪等方法对其性能进行综合评价。结果表明,该减阻剂SHJZ-1溶解时间短,起黏快;当盐水的矿化度达到40000 mg/L时,0.5%SHJZ-1溶液的减阻率在68%左右;0.15%SHJZ-1溶液在140℃下高温老化,减阻率仍能达到70%以上;1.3%SHJZ-1溶液处理后的岩心表现出超疏水效果,岩心接触角为151.21°;该减阻剂溶液对岩心平均渗透率伤害率仅为11.6%。超疏水型多功能压裂液体系在HX-1井顺利进行了现场应用,压裂过程中压裂液性能比较平稳,压后产量与临井相比提升10%以上,实现了提质增效的目的。 展开更多
关键词 滑溜水压裂液 减阻剂 超疏水 现场应用
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