共查询到19条相似文献,搜索用时 156 毫秒
1.
《中国石油和化工标准与质量》2020,(1):237-238
为提高采油工程水资源利用率,技术人员常利用采出的地层污水进行除油、除污处理后再回注入地层。本文以陶瓷膜为除油、除污核心分离组件,考察了物料流速、物料温度、压差、陶瓷膜孔道孔径对除油、除污效果的影响。结果表明,在最佳的工艺条件下油田回注水满足回注水质要求。 相似文献
2.
3.
4.
为满足低渗油田回注水的水质要求,采用自行设计并建造的功能陶瓷膜含油污水处理装置对油田回注水进行处理,试验研究了进水中悬浮物浓度、悬浮物粒径中值及含油量对功能陶瓷膜处理装置运行效果的影响,当进水中悬浮物质量浓度低于120 mg/L、悬浮物粒径中值小于5μm以及油质量浓度小于80 mg/L时,功能陶瓷膜装置的出水水质达到SY/T 5329—2012《碎屑岩油藏注水水质指标及分析方法》中低渗油田回注水水质"5.1.1"标准,并且装置已连续运行超过6个月,出水水质保持稳定。 相似文献
5.
6.
压裂及酸化作业后返排液处理是近年来低渗油田及非常规油气田开发面临的重要问题,在作业现场对返排液进行处理,处理后回注地层是最有效的解决措施.通过在延长油田某低渗油田开发区块现场取返排液水样进行化验分析,分析处理后水质指标情况,并利用实验分析了处理后压裂及酸化后排液对岩心的伤害情况.研究表明:现场水处理工艺处理后的水质指标达到了回注地层要求,处理后的返排液对岩心伤害率超过20%,需要进一步去除油和悬浮物颗粒,防止对储层造成伤害.分析了回注水矿化度对岩心伤害的影响,实验表明当回注水矿化度在60 g·L-1时岩心伤害率最低(9%左右),当矿化度增大时岩心伤害率大幅增加,因此应严格控制酸化后返排液回注水矿化度指标. 相似文献
7.
8.
9.
在油田生产中,往往将油田污水处理后回注,这样不仅可以节约生产成本,还可以避免污水随意排放造成的环境污染。但是,如何使回注污水符合油田回注水质指标,以防止造成集输系统和井筒的腐蚀和结垢,使回注水对地层的伤害最小化,一直是油田污水处理的难题。对现阶段国内外主要的污水处理技术及其应用进行了概述,并提出了对油田污水处理技术发展前景的展望。 相似文献
10.
11.
12.
Development of a biofilm-MBR for shipboard wastewater treatment: The effect of process configuration
The direct discharge of wastewater from ships is prohibited by the International Maritime Organization, especially discharge of oily bilge water. This study aims to develop a compact onboard integrated wastewater treatment system for all the wastewater streams on ships, including grey water, black water and bilge water, using biofilm-MBR technology. Both dead-end side-stream and recycle side-stream configurations of a biofilm-MBR concept have been investigated. Flat sheet ceramic membranes from KeraNor AS were applied in the membrane filtration unit. A good membrane permeate quality was achieved in each process configuration, with oil concentrations < 5 mg/L. However, the membrane was seriously fouled when the dead-end side-stream configuration was operated with a high filtration unit recovery (93%). A significantly improved membrane performance, and better permeate quality, was achieved by recycling the concentrate solution back to the biofilm reactor due to better bio-flocculation and biodegradation of oil compounds in the process. The effect of process configuration was investigated by comparing oil concentration, SMP, TSS, FCOD, TCOD, PSD of the concentrate solutions around the membrane in filtration unit. The membrane fouling rate was found to be directly related to oil concentration and oily biomass characteristics in the membrane filtration unit. 相似文献
13.
结垢是油田注水普遍存在的问题,严重影响油田的正常生产,对此以新疆某结垢井区为例开展结垢机理分析和防垢技术研究。通过荧光光谱仪和电镜扫描分析垢样,结合水质分析和结垢趋势预测可知垢物以锶钡垢为主,成垢的主要原因在于:地层水锶、钙离子含量高,较高矿化度的采出水逐渐在井筒内壁形成垢层,且地层水与回注污水配伍性差。采用化学阻垢结合工艺防垢的方法,通过清、污水混配防垢技术最大程度去除成垢SO42-离子,选用油井井下释放式的投加方式投加溶度为100 mg/L的KZG-01。利用岩心驱替实验模拟地层真实情况实验,结果表明该方法有较好的阻垢效果且有效期长,可以用于指导现场施工。 相似文献
14.
《Ceramics International》2023,49(20):32727-32738
Insufficient permeability and membrane fouling significantly influence the efficiency of ceramic microfiltration (MF) membranes in oil/water emulsion treatment. In this study, a high-flux whisker layer ceramic MF membrane with super-hydrophilicity was successfully fabricated through gel-spin coating method and a low-temperature oxidation method, which was used to separate oil/water emulsion. The effects of the whisker layer and surface wettability were systematically investigated, and the mechanism of in-situ gelling and pore size distribution was proposed. The super-hydrophilic ceramic MF membrane with an average pore size of 250 nm exhibited a high gas flux of 934 m3/(m2·h·bar) and excellent pure water flux of 9754 L/(m2 h bar). Even after a long-term circulating filtration process, the super-hydrophilic ceramic MF membrane still maintained a high water flux of over 50 L/(m2·h) at a transmembrane pressure of 5 KPa during the treatment of oil-in-water emulsion with a concentration of 1000 mg/L. Overall, the developed ceramic MF membrane demonstrated high permeability and excellent anti-fouling performance, making it a promising candidate for oil/water emulsion wastewater treatment. 相似文献
15.
16.
油田产出液污水处理是注水生产的关键所在,通过水质分析,该水质主要表现为矿化度高、铁含量高、CO2含量及PH值低的特点,水质极不稳定,腐蚀性很强。电化学水处理技术利用污水高矿化度,电解产生·OH、O、H2O2、Cl2(ClO-)等强氧化性物质,杀灭细菌,氧化Fe2+、S2-离子成为Fe3+和S单质并沉淀去除,实现水质稳定,平均腐蚀速率降低到0.031 mm/a,并结合油田生产实际设计的用于电化学预氧化技术处理污水的新工艺流程,现场试验取得满意效果,在跟踪研究中实现了良性循环。所在用的电化学预氧化技术机理和设计的新工艺流程为油田企业提供了一定的借鉴作用。 相似文献
17.
无机陶瓷膜作为多孔介质具有分离效率高、耐酸、耐碱等优点,被视为在海水淡化、废水处理、气体分离等领域的研究热点。采用Al2O3管式单通道陶瓷膜材料构建膜组件,以燃煤电厂自来水、烟气冷凝水、脱硫废水三种不同水质为例,开展低跨膜压差下的膜组件透水性能实验,研究了膜参数、跨膜压差及水体温度等因素对渗透通量、渗透水质的影响,并对引发膜污染的机理过程进行了探讨分析。实验结果表明:陶瓷膜管的结构参数是关键因素,如孔隙率、孔径及厚度等;低跨膜压差下的渗透通量随压力增大呈线性提高,并未发现浓差极化现象,水体温度变化通过改变黏度进而影响渗透通量,同时水质较差时会导致渗透通量降低;陶瓷膜管的孔径是影响渗透水质的核心要素,微滤与纳滤膜对改善悬浮物含量、浊度及色度效果明显,不同孔径对盐度、电导率影响不同;从SEM图可以看出,污染物在膜表面或膜内部发生的沉积、架桥等现象导致严重的膜污染。充分认识影响陶瓷膜管渗透特性的关键因素及污染物的作用机理,对提高无机陶瓷膜的应用前景具有重要意义。 相似文献
18.
Membrane filtration technology combined with coagulation is widely used to purify river water. In this study, micro filtration (MF) and ultrafiltration (UF) ceramic membranes were combined with coagulation to treat local river water located at Xinghua, Jiangsu province, China. The operation parameters, fouling mechanism and pilot-scale tests were investigated. The results show that the pore size of membrane has small effect on the pseudo-steady flux for dead-end filtration, and the increase of flux in MF process is more than that in UF process for cross-flow filtration with the same increase of cross-flow velocity. The membrane pore size has little influence on the water quality. The analysis on membrane fouling mechanism shows that the cake filtrationhas significant in fluence on the pseudo-steady flux and water quality for the membrane with pore size of 50, 200 and 500 nm. For the membrane with pore size of 200 nm and backwashing employed in our pilot study, a constant flux of 150 L-m^-2-h^-1 was reached during stable operation, with the removal efficiency of turbidity, total organic carbon (TOC) and UV254 higher than 99%, 45% and 48%, respectively. The study demonstrates that coagulation-porous ceramic membrane hybrid process is a reliable method for river water purification. 相似文献
19.