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《中国石油和化工标准与质量》2013,(21)
通过对元城油田储层岩心进行水敏实验,找到引起储层损害临界矿化度,并计算由水敏引起的储层损害程度,从而为合理的注入水开发提供科学依据。实验表明:水敏是元50-10-77、元50-10-89、元50-10-61、元56-70岩石伤害的潜在因素。在注水开发中,注入水的矿化度应不低于90000mg/L,或者在注入水中加入高效粘土稳定剂防止造成伤害。 相似文献
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HH油田属于典型的低孔特低渗储层油田。注入水与储层流体的配伍性对注水开发方案设计极为重要。通过开展HH油田注入水与C8、C9储层地层水的水质测定、结垢趋势预测和静、动态配伍性实验以及注入水与储层原油的配伍性实验,明确了HH油田注入水与C8、C9储层流体配伍性。结果表明,HH油田注入水与C8、C9地层水不配伍,存在碳酸钙垢趋势,且随着注入水比例的增加、温度的升高,碳酸钙结垢越严重,注入水与地层水比例为9∶1时结垢指标SI值为2.354,SAI值为2.873,结垢程度严重;注入水与地层原油之间配伍性良好。该研究结果对HH油田注水水质指标标准制定、注水开发方案制定及水质处理等研究提供了依据。 相似文献
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常规注水开发是目前低渗透油田最为常见的开发手段。随着开发的进行,受储层物性及注入水水质的影响,地层内部易受到一定程度损害导致储层渗透性进一步降低,地层亏空加剧。通过对XX油田低渗透油藏BL49区块进行储层岩性特征、微观孔隙结构特征及注入水水质等分析研究,发现该块储层具有一定的水敏、盐敏及酸敏性;储层喉道半径主要集中在0.2~0.9μm之间,与注入水中的悬浮颗粒粒径不配伍,易在地层内形成堵塞。同时注入水细菌含量及含油量超标,会对储层造成一定程度伤害。 相似文献
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商河油田属低渗储层,为了预防在注水过程中对储层造成的伤害,在投入注水开发前室内采用静态分析与动态流动实验相结合的手段,对现场提供的注入水与储层的配伍性以及增注解堵措施进行实验研究。结果表明:明化镇水对储层产生较强的水敏伤害,渗透率降低58~85%,如作为注水水源,在注水前和注水过程中必须对储层进行粘土稳定处理;沙二水对储层的伤害主要表现为中等水敏伤害、悬浮颗粒堵塞,对储层的粘土稳定处理和对沙二水的精细处理可显著提高储层的渗流能力;KS-1型粘土稳定荆适合该储层低渗的特点,可作为该储层的粘土稳定处理荆;盐酸可作为注入沙二水后储层解堵首选酸液。 相似文献
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曹新 《精细与专用化学品》2023,(3):14-18
阳离子季铵盐聚合物BHFP-02防膨剂长期应用于海上S油田A区块、B区块注水井防膨作业,防膨缩膨效果优异。从历次现场防膨井施工作业效果反馈,44井次防膨作业效果明显,19井次防膨作业效果不明显。历次防膨作业井中挑选效果不明显的3口井,根据防膨井选井依据,对S油田区块岩芯模拟地层水及标准盐水水敏性实验、地层水速敏及煤油速敏性实验及单井注入量、防膨剂耐冲刷性、防膨率实验、单井设计药剂量及油藏单井配注量等,分析不明显防膨井存在的影响因素。结果表明:S油田储层水敏指数为0.43~0.63,属于中偏强水敏,注入水矿化度低于临界矿化度,防膨井储层存在水敏伤害;S油田A区块地层属弱速敏性,B区储层为弱以及中等偏弱的流速敏感,注水速度应控制在临界流速以下,减小速敏对防膨井储层均影响;对注水量高的防膨井,可优化注水频次和提高防膨剂的吸附能力,来保证防膨井效果及防膨有效期。 相似文献
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低渗透油藏注水开发存在问题分析 总被引:1,自引:0,他引:1
针对目前低渗透油田注水开发存在注水井注入压力上升快、吸水能力变差,采油井产量下降快、采收率低的一些突出问题,分析了产生这些问题的主要原因。研究表明,由于注入水水质问题、储层的敏感性、开采过程中储层有效应力增加以及低渗透油藏过度压裂造成注入水沿裂缝窜流等是造成低渗透油藏注水开发效果差的主要原因,并且储层伤害具有动态性、叠加性和不可恢复性。低渗透油藏注水开发中,应注重注水水质精细处理和注入水与地层水的配伍性,合理控制注采速度,保持地层能量,优化压裂方案,避免因过度压裂引起的注入水窜流,不能有效地开采基质中的剩余油。 相似文献
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水基压裂液对储层伤害性研究 总被引:3,自引:0,他引:3
通过室内实验,测定了4种类型压裂液(羟丙基胍胶型压裂液、田菁胶型压裂液、香豆胶型压裂液、胍胶原粉型压裂液)的性能,评价了压裂液与模拟延长川口采油厂储层岩石和地层水的相容性,并对模拟长6油层岩心进行了五类敏感性的分析,找出了压裂液对储层伤害的原因,为改善本油层使用压裂液性能提供依据。实验结果表明,4种类型压裂液的残渣量均较大,是造成压裂低效的主要原因;压裂液中破胶剂浓度相同的情况下,破胶时间与温度成反比,胶囊破胶剂有相对较高的降粘率;长6油层具有较强的水敏性、中度酸敏性和碱敏性,且压裂液对岩心渗透率损害严重。 相似文献
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敏感性评价是研究储层伤害机理、减小储层损害的依据,是油田高效开发的基础.安塞油田属于开发难度较大的低孔特低渗油田,其主力开发层长6油层孔隙度低,渗透性差,非均质性较强.结合该地区的地质特征和储层特征,对安塞油田长6储层进行敏感性室内评价实验,室内评价实验表明:安塞油田长6储层具有中偏强速敏、弱水敏、弱盐敏、中等酸敏和弱~中等碱敏的特征. 相似文献
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N.S. Kolhe Y.H. Mirage A.V. Patwardhan V.K. Rathod N.K. Pandey U. Kamachi Mudali R. Natarajan 《Chemical Engineering Research and Design》2011,89(10):1909-1918
This paper intends to study the single phase axial dispersion in pulsed sieve plate column using a combination of computational fluid dynamics (CFD) simulations and experimental measurements. Experiments and CFD simulations were conducted on 0.076 m diameter pilot scale column having standard geometry of 0.05 m plate spacing, 0.003 m hole diameter and 0.21 fractional free area. The effect of density of tracer solution and radial probe position on axial dispersion coefficient has been studied to ensure precision of the experimental measurement method. The effect of pulse velocity from 0.01 to 0.025 m/s and superficial velocity of water from 0.01 to 0.03 m/s has been studied. Simulations were carried out using commercial CFD software, FLUENT 6.2.16, with standard k–? model for turbulence. An unsteady state tracer injection technique was used for axial dispersion measurement. The range of velocity ratio (ψ = Reo/Ren) employed in this work was 1–4 which is very low. Therefore the effect of superficial velocity, Vc was found to be greater than pulse velocity. These results were critically compared with published data and it has been found that single phase axial dispersion coefficient is directly proportional to effective velocity (Af + 0.5 Vc). The presented CFD predictions and validation with experimental data will provide useful basis for further work on single phase axial dispersion with various geometrical parameters and understanding the two phase flow patterns in pulsed sieve plate column. 相似文献
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Ali Hojeij Laurent Jossic Philippe Séchet Cyrille Bonamy Albert Magnin Stéphane Hattou 《American Institute of Chemical Engineers》2022,68(2):e17442
Mixing by gas injection is an operation used in industrial processes such as wastewater treatment, metallurgy, or methanization in which pressurized gas is injected into a fluid in order to reduce concentrations and temperatures gradients. This study demonstrates how the CFD toolbox OpenFOAM can be used to simulate such flows. Experimental measurements and observations have been performed on a pilot-scale reactor where pressurized air is injected in a yield stress fluid. The volume of fluid method and an adaptive mesh with refinement at the interface have been used to track the gas inclusions. The numerical model accuracy has been assessed by comparing experimental and numerical results related to the bubble's frequency, dimensions, and rising velocities as well as the fluid recirculation, yielded, and unyielded regions in the tank. The influence of injection parameters such as the injection flow rate and the fluid rheological parameters has been quantified. 相似文献
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《Powder Technology》2005,149(2-3):139-147
The purpose of this paper is to study the effects of a secondary flow injection method on submicron particle separation in a cyclone. It is found that particle collection efficiency increased with an increased secondary flow rate in the upper cylindrical section of the cyclone.In order to achieve a high particle collection efficiency, the location of the secondary flow injection should be close to the upper plate and a high injection velocity should be used.The use of a newly developed cyclone (type A) resulted in a high particle collection efficiency. Nearly all particles are collected by the secondary injection fluid flow. Three-dimensional simulation results are qualitatively agreed with the experimental data. 相似文献