共查询到17条相似文献，搜索用时 500 毫秒
1.
李笑薇 《东北石油大学学报》2012,(5):72-75,3
在地层温度45℃条件下,开展强碱三元复合体系与大庆原油多次乳化实验,分析多次乳化后水相的化学剂组成及性能.结果表明:聚合物质量浓度降低主要为水解作用;表面活性剂和碱质量分数随乳化次数增多而降低;该表面活性剂构成合理,与大庆原油配伍性好;复合体系在乳化第5次仍与原油有较低的界面张力;多次乳化过程中存在水中含油过饱和阶段.这为加强复合体系与大庆原油乳化作用和三元体系动态驱油机理的认识,为化学驱油配方筛选及机理研究提供参考. 相似文献
2.
《东北石油大学学报》2016,(4)
大庆油田西区二类油层平面、纵向非均质性强,井组油层条件差异大,采用一类油层均一化各种参数和调整方法难以满足二类油层三元复合驱的要求,致使二类油层三元复合驱效果差。首先通过实验建立大庆油田西区二类油层三元复合体系浓黏曲线、质量浓度与渗透率匹配关系模板;然后结合区块渗透率分布、三元复合驱控制程度及已注三元复合驱区块经验,确定全区基本注入参数。通过精细油层地质解剖、单井量化井组分类和数值模拟,个性化设计大庆油田西区二类油层注入参数,提出适合西区二类油层不同类型井组的注入参数优化设计方法,优化全区及单井注入方案。结果表明:单井注入聚合物质量浓度为1.35~1.95g/L,前置聚合物段塞为0.040PV,主段塞(P+0.30%S+1.20%A)(质量分数)为0.350PV,副段塞(P+0.15%S+1.00%A)(质量分数)为0.150PV,后续聚合物保护段塞为0.250PV时,储层动用程度达到79.5%。相对于西区二类油层笼统三元复合驱注入聚合物,含水率下降3.76%,提高采收率1.70%。该方法可为其他类似区块的三元复合驱开发提供指导。 相似文献
3.
《东北石油大学学报》2015,(5)
目前大庆油田采用深度处理污水进行复合驱回注,污水处理工艺复杂.分析油田深度处理污水(深污)、普通处理污水(普污)和强碱三元采出污水(三元污)等,对强碱三元复合体系界面性能、稳定性、乳化能力、抗吸附性能、岩心注入能力及驱油效率的影响程度.结果表明:深度处理污水和普通处理污水配制体系有较好的抗吸附性能,同时与原油配伍性较好,普通处理污水比深度处理污水表现出更好的注入能力和驱油效率;强碱三元采出污水注入能力最好,但水质成分复杂,原油配伍性和抗吸附性能较差.根据配制三元复合体系性能,优选结果为普污深污三元污.普通处理污水和深度处理污水达到复合体系性能要求,可以回注强碱三元复合驱区块,降低成本,减少采出液排放污染;三元采出污水有待采用更先进的手段进行处理. 相似文献
4.
注水开发中油层结垢伤害机理与防治措施 总被引：1，自引：0，他引：1
油层结垢是油田注水开发中主要油层伤害类型,严重影响油田开发的经济效益.为了解决油田结垢伤害问题,国内外各油田采用了机械除垢、化学除垢等多种方法,并开发了针对不同油田、不同垢类的除垢、防垢产品,但到目前为止还没有找到一种经济实用、简单易行,并能从根本上解决该问题的有效方法.针对该难题,首次提出了一种防治结垢新方法--油田水源混配防垢法.该方法主要是通过采用地层水或油田污水与注入水在地表提前以最佳比例混配,用Ca(OH)2调节pH值,一方面可去除水中的Ba2+、Ca2+、Fe3+、SO2-4、CO2、HCO-3、CO2+3、S2-等成垢离子,避免地层水和注入水在油层内相遇而结垢,达到保护油层的目的;另一方面使铁进入腐蚀钝化区,防止输水管道结垢与锈蚀.此方法改变了传统的防垢、除垢思路,把地层水或油田污水作为除垢的沉淀剂, 通过在地表提前消除混合水中的成垢离子,实现了对各种成垢物的一次性清除,不但防止了油层结垢伤害,而且解决了输水管道结垢与锈蚀问题,同时还可实现油田污水的利用.该法可大大降低采油成本,并适用于任何油田. 相似文献
5.
基于大庆油田三元复合驱采出污水回注对地层存在的损害现象,研究了污水回注渗透率的影响因素。采用室内水驱实验方法,对三元复合驱采出污水中悬浮物、油、碱、聚合物等因素进行了分析,阐述了各种成分对渗透率的影响机理。结果表明,悬浮物颗粒会堵塞孔隙喉道,油产生的"贾敏效应"将增大油水流动阻力,碱与岩石及黏土矿物间的物理化学作用会使地层结垢,聚合物在岩芯中的吸附和滞留共同造成地层渗透率的下降。因此,建议将三元复合驱采出污水中悬浮物、油、碱、聚合物等处理合格后再进行回注,以减轻对地层的损害。 相似文献
6.
《东北石油大学学报》2017,(5)
为了改善咪唑啉类缓蚀剂耐高温性能,满足油气井酸化施工需要,在一种新型咪唑啉缓蚀剂基础上,添加丙炔醇、碘化钾等助剂进行复配,得到一种具有抗高温性能的酸化缓蚀剂MZL-1,采用失重法测试MZL-1缓蚀性能,采用电化学测试和SEM、EDS等实验分析MZL-1缓蚀机理。结果表明∶在20.00%HCl、1.0%加量、90℃温度条件下,添加酸化缓蚀剂MZL-1的N80试片的腐蚀速率为1.30g/(m2·h)。腐蚀速率降低原因是MZL-1缓蚀剂分子吸附到碳钢表面,形成一层致密的吸附膜,阻碍侵蚀性离子和试片表面的接触,有效抑制钢铁试片在酸液中的腐蚀。 相似文献
7.
为研究岩心微观孔隙结构在强碱三元复合驱替过程中的变化特征,以大庆油田南5-4-检725井855.0m处岩心为对象,通过原子力显微镜观察岩心形貌特征,定量分析孔喉宽度和深度;分析驱替过程中岩心样品的面孔率、孔喉宽度和深度、分形维数等参数变化反映的微观孔隙结构变化规律.结果表明:原子力显微镜获得的图像可以真实反映储层岩石微观形貌特征,储层微观孔隙结构具有二段式分形特点.微观孔隙结构变化特征在驱替初期,主要表现为岩石粒间颗粒运移;在驱替中后期,主要表现为强碱三元驱替剂与岩石相互作用,生成驱替剂残留或其他产物.该研究结果对分析强碱三元复合驱替后剩余油分布规律、制定后续开发方案具有指导意义. 相似文献
8.
注水开发中油层结垢伤害机理与防治措施 总被引：4，自引：0，他引：4
油层结垢是油田注水开发中主要油层伤害类型，严重影响油田开发的经济效益。为了解决油田结垢伤害问题，国内外各油田采用了机械除垢、化学除垢等多种方法，并开发了针对不同油田、不同垢类的除垢、防垢产品，但到目前为止还没有找到一种经济实用、简单易行，并能从根本上解决该问题的有效方法。针对该难题，首次提出了一种防治结垢新方法——油田水源混配防垢法。该方法主要是通过采用地层水或油田污水与注入水在地表提前以最佳比例混配，用Ca(OH)2调节pH值，一方面可去除水中的Ba^2 、Ca2^2 、Fe^3 、SO4^2-、CO2、HCO3^-、CO3^2-等成垢离子，避免地层水和注入水在油层内相遇而结垢，达到保护油层的目的；另一方面使铁进入腐蚀钝化区，防止输水管道结垢与锈蚀。此方法改变了传统的防垢、除垢思路，把地层水或油田污水作为除垢的沉淀剂，通过在地表提前消除混合水中的成垢离子，实现了对各种成垢物的一次性清除，不但防止了油层结垢伤害，而且解决了输水管道结垢与锈蚀问题，同时还可实现油田污水的利用。该法可大大降低采油成本，并适用于任何油田。 相似文献
9.
稠油油藏单一方式火烧开采后期存在易气窜、燃烧不充分、波及效果差等问题.以辽河油田G3块火驱试验区天然岩心为研究对象,进行稠油油藏一维火烧物理模拟实验,结合产出流体、储层矿物特征,分析火烧蒸汽复合驱热采技术优势,应用数值模拟进行特征验证和生产预测.结果 表明:火烧蒸汽复合驱比单一方式火烧的火线最高温度提高150℃以上、高温区域扩大2倍以上.水蒸汽参与火烧过程产生化学反应,降低开发后期对空气的需求;反应过程中释放大量热能,既加热原油促进流动性,又加热储层岩石提高储层渗流能力.火烧蒸汽复合驱提高阶段采油速度,改善开发效果,数值模拟结果与物理模拟实验特征吻合.该结果为稠油油藏进一步改善火烧油层开发效果提供依据. 相似文献
10.
设计一种新型光纤光栅锈蚀传感器,主要由锈蚀体、不锈钢体和2段串联的光纤布拉格光栅（FBG）组成。缠绕于锈蚀体表面的FBG监测钢筋的锈胀应变,缠绕于不锈钢体表面的FBG用作温度补偿器,消除温度变化对锈胀应变监测的影响。此外,设计电化学加速腐蚀实验,探究该传感器在不同强度等级混凝土中的工作性能。结果表明,该传感器监测质量腐蚀率的灵敏度为0.02%,监测范围大于1%,可实时监测混凝土中钢筋的锈蚀过程及特征,为预警钢筋锈蚀引起的钢筋混凝土结构耐久性损失提供阈值,在结构健康监测领域具有较大的应用价值。 相似文献
11.
INTR0DUCnONAlloycoatingscandetivelyproteCtsteelagainstcormsioninseri0uscormsionenvir-orunent,suchasthedrinesplashandtidalzones-TwoInainhodiptincaldrinumalloycOaingswidelyusedcommroiallyareGalfancoaing(contalningZn-5wt%kl-us)devel-oPedbytheIntemaionaltalZincReenhheZaionandhocoating(c0n-talningZn-55Wt%Al-1.6Wt%Si)develoPedbytheBethlehemSteelCorpOration-Anewrinc-basedalloycOaingdevel0PedbyNortheaStemUniversityisdiscussedinthesPaperbyelecthehendcalmethod.FromSun(l996),welmOWthecorms… 相似文献
12.
The corrosion of rebar in reinforced concrete in marine environments causes significant damage to structures built in ocean environments. Studies on the process and mechanism of corrosion of rebar in the presence of multiple ions may help to control damage and predict the service life of reinforced concrete structures in such environments. The effect of interactions between sulfate and chloride ions and calcium hydroxide on the electrochemical behavior of rebar are also important for evaluation of structure durability. In this work, electrochemical impedance spectroscopy(EIS) plots of rebar in Ca(OH)_2 solution and cement grout, including NaCl and Na_2SO_4 as aggressive salts, were measured for different immersion times. The results show that corrosion of rebar was controlled by the rate of charge transfer as the rebar was exposed to chloride solution. In the presence of high concentrations of sulfate ions in the electrolyte, generation and dissolution of the passive film proceeded simultaneously and corrosion was mainly controlled by the diffusion rate. When Na_2SO_4 and NaCl were added to Ca(OH)_2 solution, the instantaneous corrosion rate decreased by a factor of 10 to 20 as a result of the higher p H of the corroding solution. 相似文献
13.
《中国海洋湖沼学报》2017,(2)
Considering the continuous exploitation of marine resources,it is very important to study the anticorrosion performance and durability of zinc coated streel(ZCS) because its increasing use as reinforcements in seawater.Tafel polarization curves and linear polarization curves combined with electrochemical impedance spectroscopy(EIS) were employed to evaluate the corrosion performance of ZCS at Qingdao test station during long-term immersion in seawater.The results indicated that the corrosion rate of the ZCS increased obviously with immersion time in seawater.The corrosion products that formed on the zinc coated steel were loose and porous,and were mainly composed of Zn_5(OH)_8Cl_2,Zns(OH)_6(CO_3)_2,and ZnO.Pitting corrosion occurred on the steel surface in neutral seawater,and the rate of ZCS corrosion decreased with increasing pH. 相似文献
14.
Daqing Oilfield has carried out the production of polymer flooding was promoted since in 1996.Presently, polymer flooding is very successful in several production plants of Daqing Oilfield, and getting into industrialisation production. It has played a very important role in maintaining the oilfield stable production of over 50 million tons of oil.But the high permeability variation is serious, resulting in polymer production in some production wells recylingly and production concentration increasing slowly, which adversely affects polymer flooding efficiency.Colloid dispersion gels (CDG) is a unique in- depth permeability modification process. It can reduce in- depth reservoir permeability variation by moving into highly permeable, water saturated zones and providing high resistance to subsequent water injection in those zones, so that oil can be produced from tighter rock. So CDG can enlarge volumetric sweep, and improve oil recovery efficiency.We had a CDG pilot programme in Daqing Oil Field in 1999, now this pilot has been entering into effective period with produing more oil and less water.Introduction 相似文献
15.
ImooUonONSCCisoneofthemosttwortantcausoffailureofstaiuleSsstalequipmentandfacilitieS.Studiesonunh0refacilitiesshowedthatanaddicchloridesolutionfilmcouldbefo~onthescheeofstalandthatstaiuleSSstalisinaCtivedissolutionstateinaedicchloridesolutionopinetal.,l99O;Gnanamoorthyetal.,l99O).ltisgenerallythoughtxthatSCCcannotoimrwhenthematerialisinaCtiveanodicdissolutionstate,soitsomcewithresultingcasualties(0ldfieldetal.,l99O)arousedattentiont0it.SomeSCCmeCanisrnsproposedpeuang,l988,Newmanctal.,… 相似文献
16.
Princinple of colloidal dispersion gels technologyColloidal dispersion gels are made of low concentrations of POlymer and crosslinker. Polymer concentrations normally range from 100 to 1200 ppm.In this concentration range, there is not enoughpolymer to fo… 相似文献
17.
GAO Rongjie DU Min SUN Xiaoxia PU Yanli 《中国海洋大学学报(英文版)》2007,6(4):349-354
The corrosion resistance of electroless Ni-P deposits with phosphorous contents from 12% to 14% in sodium chloride solutions was studied. The deposits were immersed in 3.5% NaCl solutions for 29 d to obtain the electrochemical parameters and were examined in a standard salt spray test for 15 d respectively. The corrosion resistance of the deposits was studied by poten- tio-dynamic scan, electrochemical impedance spectroscopy (EIS), X-ray diffraction (XRD) and cold-field emission scanning electron microscopy (FE-SEM) equipped with an energy dispersive X-ray detector (EDX). The patterns of XRD and the results of FE-SEM showed that the prepared deposits were amorphous. But after a 15 d standard salt spray test, a few pinholes appeared on the surface of the deposit and the weight content of phosphorus on the surface of the deposit was higher (which was beneficial to the formation of the passivation films) than that before the standard salt spray test when the nickel content was lower because the dissolved weight of nickel was greater than that of phosphorus. The results from potentio-dynamic scan and EIS showed that passivation films formed on the Ni-P deposit after immersion in the NaCl solutions, which decreased the corrosion rate of Ni-P samples. The results of this work show their potential applications in marine corrosion. 相似文献